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Burning of fuel releases heat and light this process is an example of which type of reaction

Webster's Dictionary: A fire is an exothermic chemical reaction that emits heat and light Fire can also be explained in terms of the Fire Tetrahedron - a geometric representation of what is required for fire to exist, namely, fuel, an oxidizing agent, heat, and an uninhibited chemical reaction This process in known as Combustion. Combustion is a chain reaction chemically similar to photosynthesis in reverse. Photosynthesis requires a large amount of heat which is furnished by the sun. The Combustion process releases this heat A fire's colorful flame results from a chemical reaction known as combustion. During combustion, atoms rearrange themselves irreversibly. In other words, when something burns, there's no un-burning it. Fire also is a glowing reminder of the oxygen that pervades our world

Combustion is a chemical process or a reaction between Fuel (Hydrocarbon) and Oxygen. When fuel and oxygen react it releases the heat and light energy. Heat and light energy then result in the flame. So, the formula for Combustion reaction is Hydrobcarbon + Oxygen = Heat energy Hot charcoal. Fuel combustion, also known as burning fuel, is the process by which a fuel is consumed in an exothermic chemical reaction that released a great deal of heat and light. Usually, the fuel that is combusted is a hydrocarbon that reacts with the oxygen in the air Fire is burning, which is combustion, and combustion is a type of oxidation reaction. Oxidation means combined chemically with oxygen . Oxidation is an exothermic reaction, meaning it gives releases heat energy. The chemical equations for the oxidation of carbon and hydrogen are: These reactions release the energy you feel as heat and light

This energy was stored inside the fuel and is released when you burn it in a process called combustion. Combustion is where you burn a fuel in the presence of an oxidant, which is usually just.. Answer: (C) light. Solution: Combustion or burning is an exothermic chemical reaction (in the presence of oxygen) that releases a significant amount of heat and light. Light is either in the form of a glow or a flame. Not all substances have a flame when burned. Flame depends on whether or not combustible vapours are released by the fuel. An.

When fuels burn they release heat energy and light energy to the surroundings in exothermic reactions known as combustion reactions. The energy released can be calculated using the equation Eh=cm∆T When you see a fire burning, you have wood (fuel) interacting with oxygen which (through a chemical reaction) gives off heat - and light.. But the light appears to emit at some point well-away from the actual fuel - i.e. the flames appear to rise inches (or more) above the actual fuel source where (I assume) the actual combustion/reaction is taking place Energy is obtained from fossil fuels through combustion (burning) of the fuel. Although impurities exist in fossil fuels, hydrocarbon combustion is the primary process in the burning of fossil fuel. An example of hydrocarbon combustion is illustrated in Figure 1. See simulation at the bottom of the page for more examples

Combustion is a chemical reaction that occurs between a fuel and an oxidizing agent that produces energy, usually in the form of heat and light. Combustion is considered an exergonic or exothermic chemical reaction. It is also known as burning. Combustion is considered to be one of the first chemical reactions intentionally controlled by humans Rapid combustion otherwise known as fire is a type of reaction which releases a large amount of heat and light and results in a flame often. This reaction is used in the form of machinery like internal combustion engines and thermobaric weapons. This combustion is intermittently known as explosion combustion. 5.Spontaneous combustion Overall, combustion is an exothermic reaction given off or exiting, which means that energy is released. Usually, heat and light are released during a combustion reaction. During exothermic reactions (like combustion), bonds are broken, which allows the energy trapped in the bonds to be released and do work Combustion of Fossil Fuels Combustion is a reaction with oxygen. of the combustion of fossil fuels, the combustion reaction is what we think of as a burning process. In the combustion reaction, the species reacting wit

Fire Dynamics NIS

Combustion is a chemical reaction in which substances react with oxygen to produce heat and light as energy forms. In common, we call it burning. The light energy that comes out as an outcome of this reaction appears as a flame. However, most of the energy released as heat. There are two types of complete and incomplete combustion You can see an example of a combustion reaction in Figure below. Combustion is commonly called burning. The substance that burns is usually referred to as fuel. The products of a combustion reaction include carbon dioxide (CO 2) and water (H 2 O). The reaction typically gives off heat and light as well But lean flames do burn hotter just by adding more air, see this figure for example. It's a non-linear process -- there is less heat release because there is less fuel, but air heats up with less energy than fuel does. - tpg2114 Jan 29 '16 at 10:1

Combustion is a chemical reaction where a material quickly reacts with oxygen and gives off heat. The initial material is called a gasoline, and the oxidizer is considered the source of oxygen. The fuel may be a solid, liquid, or gas, although the fuel is typically a liquid for airplane propulsion Typically, fire comes from a chemical reaction between oxygen in the atmosphere and some sort of fuel (wood or gasoline, for example). Of course, wood and gasoline don't spontaneously catch on fire just because they're surrounded by oxygen. For the combustion reaction to happen, you have to heat the fuel to its ignition temperature Combustion is often hot enough that incandescent light in the form of either glowing or a flame is produced. A simple example can be seen in the combustion of hydrogen and oxygen into water vapor, a reaction commonly used to fuel rocket engines Combustion is an exothermic reaction, meaning it releases heat, but sometimes the reaction proceeds so slowly that the change in temperature is not noticeable. Combustion doesn't always result in fire, but when it does, a flame is a characteristic indicator of the reaction

material is consumed first. If the energy release is large and of sufficient duration, the drying of green, live material occurs, with subsequent burning of this material as well. Under proper environmental and fuel conditions, this process may initiate a chain reaction that results in a widespread conflagration Burning a fuel is called combustion, a chemical process that we study in middle or high school. Because combustion is so important for rocket propulsion, we will review the fundamentals. Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source. Burning of fuels - whether it is a car's engine or a gas stove, burning of fuels is also an exothermic reaction. The generated heat is used for purposes ranging from driving a motor, cooking, etc. The burning of hydrogen in hydrogen-oxygen fuel cells is a type of exothermic reaction as it undergoes combustion and produces an electric charge.

The Combustion Process - Auburn Universit

  1. Combustion, a chemical reaction between substances, usually including oxygen and usually accompanied by the generation of heat and light in the form of flame
  2. The charcoal and coal bums in air producing carbon dioxide, heat and light. Air or oxygen which helps in burning is called supporter of combustion and the chemical reaction which takes place with the release of heat and light energy is called combustion
  3. The defining difference between a fire and your half-eaten apple is speed: fire is an oxidation process that happens very fast, so that light, heat and sound are released — often with enough force and majesty to justify the ancients' reverence.The sudden release of energy causes temperatures to rise, sometimes by thousands of degrees
  4. Combustion is the scientific word for burning. In a combustion reaction, a substance reacts with oxygen from the air. Combustion reactions happen at high temperatures, and transfer energy to the..
  5. What is actually burning is it fuel heat vapor or oxygen? Fire is a chemical reaction in which energy in the form of heat is produced. When forest fuels burn, there is a chemical combination of the oxygen in the air with woody material, pitch and other burnable elements found in the forest environment. The Combustion process releases this heat

Explainer: How and why fires burn Science News for Student

rapid chemical reaction of two or more substances with a characteristic liberation of heat and light; it is commonly called burning. The burning of a fuel (e.g., wood, coal, oil, or natural gas) in air is a familiar example of combustion light. Solution: Combustion or burning is an exothermic chemical reaction (in the presence of oxygen) that releases a significant amount of heat and light. Light is either in the form of a glow or a flame. Not all substances have a flame when burned. Flame depends on whether or not combustible vapours are released by the fuel. An example of.

Fire can take a variety of forms, but all fires involve a heat- producing chemical reaction between some type of Fuel and an oxidizer, Most commonly oxygen in the air. Combustion A chemical process of oxidation that occurs at a rate fast enough to produce heat and usually light in the form or either a glow or flame Combustion is a chemical process or a reaction between Fuel i.e. Hydrocarbons and Oxygen. When fuel and oxygen react it releases the energy in form of heat and light. Heat and light energy then result in a flame. The combustion process is used in car motors and rocket engines and in many other types of machinery Combustion is a chemical process in which a substance reacts rapidly with oxygen and gives off heat. The original substance is called the fuel, and the source of oxygen is called the oxidizer. The fuel can be a solid, liquid, or gas, although for airplane propulsion the fuel is usually a liquid

When it gets hot, it releases a lot of extra oxygen and heat. This makes the match head burn quickly and strongly. When you put it all together - the heat, the fuel, and the oxygen - you get a. A chemical reaction that releases energy is called an exergonic reaction. This type of reaction can be represented by a general chemical equation: \[\mathrm{Reactants \rightarrow Products + Energy}\] Besides rusting and burning, examples of exothermic reactions include chlorine combining with sodium to form table salt Combustion reactions are more often simply called burning. There are two parts that are essential to combustion reactions, including hydrogen combustion: a fuel and an oxidizing agent. With the input of heat, hydrogen reacts with oxygen to release heat and light energy. The end products of the reaction include water vapor and heat

The endpoint is helium, known to be the second most abundant element in the sun. It is often referred to as hydrogen burning to helium, and hydrogen is often called fuel, but one must understand that the reaction is not burning in the sense of a chemical reaction between a fuel, such as coal or wood, and oxygen. It is a nuclear reaction The heat generated by the reaction is what sustains the fire. The heat of the flame will keep remaining fuel at ignition temperature. The flame ignites gases being emitted, and the fire spreads. As long as there is enough fuel and oxygen, the fire keeps burning. Fuel + oxygen (from the air) = combustion products (mainly CO 2 + H 2 O) + heat energy A combustion reaction is a reaction in which a substance reacts with oxygen gas, releasing energy in the form of light and heat. Combustion reactions must involve \(\ce{O_2}\) as one reactant. The combustion of hydrogen gas produces water vapor The specific heat capacity of water is 4.18 J/(g · °C), meaning it takes 4.18 J to raise the temperature of 1 g of water by 1°C. Calculate the heat of combustion in kJ/g for the sample of biodiesel you burned. The heat of combustion is the quantity of thermal energy given off when a certain amount of a substance burns A: The burning of wood is an exothermic reaction. You can tell by the heat and light energy given off by a wood fire. Summary. A chemical reaction is a process in which some substances, called reactants, change into different substances, called products. During the reaction, chemical bonds break in the reactants and new chemical bonds form in.

Combustion - Definition, Types of Combustion, Example

This ignition source may be electrical, heat, or pressure, but whatever its form, it initiates the chain reaction. As a result, CO 2 and H 2 O are given off as the products of combustion (step 4) Combustion Examples. When a type of fuel combines with oxygen, the reaction causes the substances to combust. The products of combustion reactions are heat, light, and a byproduct (typically soot, smoke, or ash). Some examples of combustion include combustion, rapid chemical reaction of two or more substances with a characteristic liberation of heat and light; it is commonly called burning. The burning of a fuel (e.g., wood, coal, oil, or natural gas) in air is a familiar example of combustion. Combustion need not involve oxygen; e.g., hydrogen burns in chlorine to form hydrogen chloride. New catalyst turns ammonia into an innovative clean fuel. Ammonia (NH3) has attracted attention in recent years as a carbon-free fuel that does not emit carbon dioxide. For use as a fuel, it. Wood is a complex fuel thatWood is a complex fuel that undergoes dramatic changes as it burns. When heated to 500 600 °F wood Wood Higher Heating Value per CSA B415 When heated to 500- F, wood 40 000 undergoes pyrolysis which liberates organic gases and leaves behind carbon rich 20,000 30,000 40,000 KJ/KG 10,000 15,000 Btu/lb Average HH

Burning fossil fuels yields carbon dioxide, water and energy; the process of burning fossil fuels is known as combustion. The combustion reaction During chemical reactions, energy is either absorbed into the environment (endothermic reaction) or released into the environment (exothermic reaction), and chemical bonds are broken and formed 2. Burn wood. Hydrocarbons in wood combine with oxygen to form water and carbon dioxide. This is a very energetic reaction, so it generates large amounts of heat and light to release that energy. It is an incomplete combustion because it generates soot. 3. A lit match

Combustion is an example of a redox reaction that occurs so rapidly that noticeable heat and light are produced. Corrosion, decay, and various biological processes are examples of oxidation that occurs so slowly that noticeable heat and light are not produced. Combustion. Combustion means burning Ishwar C. Yadav, Ningombam L. Devi, in Encyclopedia of Environmental Health (Second Edition), 2019 Abstract. Biomass burning refers to the burning of living or dead vegetation including grassland, forest, agricultural waste, and burning of biomass for fuel. It is a complex process involving physical and chemical reaction and transfer of mass and heat. Burning can be natural or man- A combustion reaction is the chemical term for a process known more commonly as burning. Combustion reaction is a type of chemical reaction involving two substances which usually include oxygen and heat. In addition to heat, it is common for a combustion reaction to release light or produce a flame This combustion releases energy which we experience as the heat and light given off by the flame. Most of the fires that we see in everyday life are carbon combustion: campfires, oven flames, candle flames, barbecue grills, forest fires, gas furnaces, gasoline burning in engines, etc. The key to remember is that carbon combustion requires oxygen

Furnaces for burning coal are more liberally sized than those for gas or fuel oil firing, as illustrated in Figure 5-19 [8].This is necessary to complete combustion within the furnace and to prevent the formation of fouling or slagging deposits. A furnace is designed to take advantage of the high radiant heat flux near the burners [14].Because the flue gas temperature at the exit of the boiler. Reaction. When magnesium is in its metal form it will burn very easily in air. However, in order to start the reaction (the burning) the magnesium metal needs a source of energy. The flame provides a source of heat so that the magnesium metal atoms can overcome their activation energy Combustion definition, the act or process of burning. See more Burning a substance is a type of chemical change. Similar to rusting, burning happens when the molecules in the wood interact with the oxygen in the air. This process releases heat and light energy. Mixing acids and bases create a chemical change. Acids and bases create a chemical reaction when mixed together absolutely not , combustion is a process in which a substance reacts with oxygen to produce energy in form of light and heat . but in sun there is no reaction involving oxygen . sun produces its light and heat by nuclear fusion , a process in which hydrogen atoms fuse together due to huge amount of gravity to form helium atoms . this reaction releases a lot of energy in form of light and heat

The burning of wood in a campfire that produces heat and light would be both an _____ and an _____ reaction. Exergonic, Exothermic If heat must be added to a chemical reaction for the reaction to take place, the reaction is ______ Pyrolysis, the chemical decomposition of organic (carbon-based) materials through the application of heat.Pyrolysis, which is also the first step in gasification and combustion, occurs in the absence or near absence of oxygen, and it is thus distinct from combustion (burning), which can take place only if sufficient oxygen is present. The rate of pyrolysis increases with temperature The nuclear fuel cycle: industrial processes which involve the production of electricity from uranium in nuclear power reactors. Electricity is created by using the heat generated in a nuclear reactor to produce steam and drive a turbine connected to a generator. Fuel removed from a reactor, after it has reached the end of its useful life, can be reprocessed to produce new fuel Have a glance at the MCQ of Chapter 6 Science Class 8 and cross-check your answers during preparation. Question 1. Wood produces ash on burning. Question 2. The zone of a flame used by goldsmith for melting gold and silver is outermost zone because it is the hottest zone. Question 3 When burning heavy oils, particulate levels mainly depend on four fuel constituents: sulfur, ash, carbon residue, and asphalenes. These constituents exist in fuel oils, particularly residual oils, and have a major effect on particulate emissions. By knowing the fuel constituent levels, the particulate emissions for the oil can be estimated

What is Fuel Combustion? (with pictures

The Chemistry of Fir

Fire is a rapid, self-sustaining _________ process, accompanied by the evolution of heat and light and varying intensities. a molecular. b exothermic. c oxidation. d endothermic. c oxidation. The fire triangle includes fuel, an oxidizer, and: A a chemical chain reaction. B energy d. Fuel Ans.16. (a) 17. Rapid combustion is a. When gas burns, it produces heat and light b. When material suddenly burst into flames c. When there is evolution of heat d. None of these Ans.17. (a) 18. Explosion is the evolution of a. Heat b. light c. Sound d. All of these Ans.18. (d) 19. Substance which vaporise during Burning gives a. Sound b. This is the same process that powers the sun and creates huge amounts of energy—several times greater than fission. It also doesn't produce highly radioactive fission products. Fusion reactions are being studied by scientists, but are difficult to sustain for long periods of time because of the tremendous amount of pressure and temperature. In nuclear fusion reactions, two light atomic nuclei combine to form a heavy atomic nucleus, which releases an enormous amount of light and heat energy.Fusion is what powers the sun. Atoms of deuterium and tritium (isotopes of hydrogen, Hydrogen-2, and Hydrogen-3, respectively) fuse under extreme temperature and pressure, producing a neutron and a helium isotope It occurs rapidly, evolving a lot of heat and light in a short period of time. For example: LPG( Liquified Petroleum Gas), Kerosene oil, Coal etc. Example: Bring a burning matchstick or a gas lighter near a gas stove in the kitchen. Turn on the knob of the gas stove. We find that the gas burns rapidly and produces heat and light

The heat change, q, in a reaction is given by the equation q = mcΔT; where m is the mass of the substance that has a temperature change ΔT and a specific heat capacity c. Students should be able to: use this equation to calculate the molar enthalpy change for a reaction. OCR Chemistry A. Module 3: Periodic table and energy. 3.2 Physical chemistr Once the volatile gases released by the fuel have reached ignition temperature, the compound molecules break apart and recombine with oxygen to form water vapour, carbon dioxide, various combustion products, and more heat. This process is called oxidation, and can be recognised as burning and smoke. Uninhibited Chain Reaction. The final face of. A wood-burning fire also transfers heat through electromagnetic radiation. This includes both the visible light that the fire produces, and light of longer wavelengths such as the infrared range of light that the human eye cannot see. A fire radiates heat with light in much the same way that the sun does. The process is also similar to the heat. Water in the heat exchanger tubes is heated as it moves upward through the tubes. Cast iron boilers produce low pressure steam or hot water, and generally burn oil or natural gas. They are used primarily in the residential and commercial sectors. Another type of heat transfer configuration used on smaller boilers is the tubeless design. This

Fuel Oil No.-1: A light liquid distillate with distillation range of about 325 to 570 F. Use is generally in vaporizing pot-type burners for space heaters, but is not recommended for wick burners. As of Oct. 1, 1993, this product may be dyed. Ultra Low-sulfur grade available. Average of 135,000 BTUs per gallon A change that releases heat is called an exothermic process. For example, the combustion reaction that occurs when using an oxyacetylene torch is an exothermic process—this process also releases energy in the form of light as evidenced by the torch's flame . A reaction or change that absorbs heat is an endothermic process. A cold pack used. Waste incineration is one of many societal applications of combustion. As illustrated in Figure 3-1, the typical waste-incineration facility includes the following operations: Waste storage and feed preparation. Combustion in a furnace, producing hot gases and a bottom ash residue for disposal. Gas. If you drive a car, heat your home, turn on a light, or enjoy a good backyard barbecue, the energy you are using most likely comes from burning fossil fuel hydrocarbons, a process called combustion the process of burning something; example is when a substance such as wood, coal, or gas reacts with oxygen to produce carbon dioxide, water vapor.

How Fuel Becomes Heat Energy - Video & Lesson Transcript

The process of burning. (noun) Dictionary Menu. Dictionary The definition of combustion means burning, or a chemical change that produces heat and light. An example of combustion is an explosion. In the older type the combustion chamber (of metal or glass). The reaction of magnesium with oxygen releases a huge amount of energy which you can see as heat and bright light. Answer 3: When magnesium burns, it is actually reacting with oxygen in the air and not with fire. Fire is what we call the heat and light produced when things burn

CBSE Class 8 Science Chapter 6 Combustion and Flame

Methane and the Environment. Natural gas, which primarily consists of methane, is the cleanest burning fossil fuel. When methane is produced from non-fossil sources such as food and green waste , it can literally take carbon out of the air. Methane provides a great environmental benefit, producing more heat and light energy by mass than other. fossil fuel production, the livestock industry, rice cultivation, biomass burning, and waste management. These activities release significant quantities of methane to the atmosphere. LANDFILLS Methane is generated in landfills and open dumps as waste decomposes under anaerobic conditions (oxygen-free). The amount of methane create

The process is known as gasification, a set of chemical reactions that uses limited oxygen to convert a carbon-containing feedstock into a synthetic gas, or syngas. Advertisement. It sounds like combustion, but it's not. Combustion uses an abundance of oxygen to produce heat and light by burning In combustion, the atoms or molecules of the fuel (coal, oil, wood, etc.) are joined to molecules of oxygen in a process that releases heat. In a nuclear reactor, the fuel atoms themselves are split into smaller atoms in a process called fission. Pound for pound, the amount of energy released in a fission reaction is over a million times larger. 6. Now sketch a detailed drawing of the burning candle, an enlargement of the portion about a centimeter from the top of the candle to the topmost tip of the flame: Label the following regions of the candle in your drawing: solid wax. liquid wax. region of wick without flame. region of wick with flame An exothermic process is a procedure where energy is produced as an output of the process when it's done. Usually the energy forms as heat energy. But it also might be in the form of light, sound or electricity. After an exothermic reaction or process, more energy is released to the environment than that was absorbed while initiating it

Calculating the energy released when fuels burn - Energy

combustion - How is the light from a fire emitted

Burning plastic trash to create energy sounds sensible: Plastic is, after all, made from hydrocarbons, just like oil, and is more energy-dense than coal. But several obstacles loom to a big. Furthermore, because of the intensified burning, it also enables the reaction to take place under more fuel-lean conditions, in which there is more oxygen than chemically required to consume the fuel Fuel-air mass ratio This is the ratio of the mass of fuel to the mass of air in the reactants. The fuel-air ratio is a method of measuring the composition of a potentially flammable mixture. Heat of combustion Ideal amount of energy that can be released by burning a unit amount of fuel. This is between 45 and 50 MJ/kg for kerosenes The basic of combustion is explained in the previous post which comprises many subjects like thermodynamics, heat and mass transfer, chemical kinetics and turbulent chemistry interaction (TCI). Mixing of air and fuel decided premixed and non-premixed flames. Many industrial problems where combustion comprises many complex physical and chemical processes such as Example. The fuel you burn in your car's engine contains octane, C 8 H 18. When octane is burned, the products are CO 2 and H 2 O. 2C 8 H 18 (l) + 25O 2 (g) → 16CO 2 (g) + 18H 2 O(g) The key ingredient to the process is the availability of oxygen. Combustion cannot take place in an atmosphere devoid of oxygen

Hydrocarbon combustion - Energy Educatio

The ideal burn of propane gas constitutes having 4 parts propane and 96 parts air. If the supply of propane and air falls within the range of 2.2 parts propane and 97.8 parts air, and 9.6 parts propane and 90.4 parts air, the combustion reaction produced will not have the desired outcome and may waste fuel or use up too much Hydrogen Fuel Cells are one example: A chemical reaction occurs wherein Hydrogen reacts with Oxygen in an electrolyte bath to produce H 2 O, and releases electricity and heat. The reaction is non-polluting, but currently has problems, such as safely storing and distributing compressed hydrogen gas, and producing hydrogen efficiently Something heats the wood to very high temperatures. This could be any number of things -- focused light, friction, something else that is already burning.; When the wood reaches about 500 degrees Fahrenheit (260 degrees Celsius), the heat decomposes some of the cellulose material that makes up the wood.; Decomposed material is released as volatile gases, typically a compound of hydrogen. Chemists call this reaction combustion, and whether we are talking about burning logs, coal, or oil, this term refers broadly to any reaction in which a substance combines with oxygen to form carbon dioxide and water, as shown in the equation below: ( S u b s t a n c e) + O X 2 → C O X 2 + H X 2 O. \ce { (Substance) + O2 -> CO2 + H2O} The formation of new bonds is an exothermic process where heat is given off. Again the energy given off is totaled to form new bonds in carbon dioxide and water molecules. Finally, the overall reaction yields an excess of energy given off -802 kj. (the minus sign means that this is an exothermic process)

Combustion Definition in Chemistry - ThoughtC

Combustion Reaction: Combustion Types and Fuels

Once the match starts burning, it releases more energy than was required for ignition so the reaction is still exothermic. The products still have less chemical energy than the reactants. In energy consuming (endothermic) reactions the total energy of the products is more than that of the reactants - heat is taken from the surrounding substances The exothermic reaction between O 2 and Fe generates enough heat to continue the thermal cutting process without the use of preheating flame using only oxygen but in practice it is not possible because a lot of heat is used up in burning dirt, paint, scale, etc., and a considerable amount is lost by radiation. Also, the high speed jet impinging. Combustion is an exothermic reaction that produces heat and can also produce light in the form of a flame or glow. Burning of propane and acetic acid produces water and releases carbon dioxide. Neutralization or Acid-Base Reaction. HBr + NaOH NaBr + H 2 O HNO 3 + Mg(OH) 2 2H 2 O + Mg(NO 3)