Structure of Chemical Reactions

chemical reactions and chemical equations

By LORDWALLY BERDIN

​Chemical Reaction

• a process in which ​a substance is changed into a one or more new substances

• When there is a chemical reaction, it means there is a change in one or more components of the substance or there is rearranging of the different components (atoms and molecules).​

• ​examples that depict chemical reactions are burning of wood, adding muriatic acid to water produced bubbles, rusting of iron and even the rotting of fruits.

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​Chemical Equation

• uses symbols to symbols to show what happens during a chemical reaction.

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​Chemical Equation

• uses symbols to symbols to show what happens during a chemical reaction.

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• "+" ​is read as "reacts with"

• the arrow means "produce" or "yields to"

• Reactants -starting substance

• Products -​ substance produced

To conform with the law of conservation of mass, there must be the same number of each type of atom on both sides of the arrow; that is, we must have as many atoms after the reaction ends as we did before it started​

CHEMICAL EQUATION

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To provide additional information, chemists often indicate the physical states of the reactants and products by using the letters g, l, and s to denote gas, liquid, and solid, respectively.

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​COMBINATION REACTION (COMPOSITION REACTION)

​two or more simple substances combine to form one complex substance. It is also called synthesis reaction.

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​two or more simple substances combine to form one complex substance.

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​a complex substance is broken down into two or more simpler substances.

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one element is substituted for another element in a compound

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the exchange of two ionic compounds forming two new

compounds.