Chemical Equation Examples

By: Madeline Hiebert, Nikki Loewen, Ashley Harder

Want to hear a joke about Nitrogen oxide? ..............NO.

Chemical Equation: An equation characterized by a chemical change that yields different products.

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Combustion


In a combustion reaction oxygen must be present in the reactant side and it always yields carbon dioxide and water. The reactants may have other elements but oxygen must be a part of the reactants.
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Synthesis


Synthesis occurs when two chemical parts come together to form one whole chemical product. There can not be two products, it has to be the combined answer of the two reactants at the beginning of the equation.

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Decomposition


Decomposition reactions occur when one combined reactant yields two products. The reactants have to be one part together and the product has to be split into two parts.
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Single-replacement


In a single-replacement reaction occurs when one element is displaced by another element that is a part of that compound. It has to replace one in the product side and switch off. This reaction will only occur if a more reactive element is replacing a less reactive element. Usually, the reaction consists of a solid being added to the solution.
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Double-replacement


In a double-replacement reaction, two compounds have to exchange elements or bonds that form different compounds in the product side. Both compounds have to switch off elements in order for it to be considered a double-replacement reaction. Like single-replacement reactions metals always replace metals and non-metals always replace non-metals. Double replacement reactions often produce precipitates when non-soluble compounds are produced.
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Acid base


In Acid Base reactions, an acid and a base must be present in the reactant side and the product side will always contain water and a salt. This is because when an acid and a base are placed together, they react to neutralize each others properties producing a salt. Therefore, It can be any acid and base in the reactant side, but the product has to be a salt and water.
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My Chemistry teacher threw sodium chloride at me.... that's a salt.

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