Classifying Reactions - Anne Elizabeth Franck | Library

Introduction: Chemical equations show how compounds and elements react with one another. An element is a substance consisting of one kind of atom, such as aluminum (Al) or oxygen gas (O2). A compound is a substance made of more than one kind of atom, such as water (H2O) or table salt (NaCl).

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Match: Most chemical reactions can be classified as one of four types. Using your notes as a guide, match the following definitions to the type of reaction. Drag the term to match to the correct definition.

Draggable item		Corresponding Item
Decomposition		One reactant is broken down into two or more products.
Double replacement		Two or more reactants combine to form one product.
Single replacement		Two compounds react to form two different compounds.
Synthesis		A compound reacts with an element to form a new compound and a different element.

Practice: Balance each of the chemical equations below. (Some equations may already be in balance.) And then below it, classify the reaction as a synthesis, decomposition, single replacement, or double replacement reaction.

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_______ AgNO3 + _______ KCl → _______ AgCl + _______ KNO3

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Classify the reaction above.

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_______ H2O + _______ SO3→ _______ H2SO4

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Classify the reaction above.

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_______ KBr + _______ Cl2→ _______ KCl + _______ Br2

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Classify the reaction above.

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_______ NaHCO3 → _______ Na2CO3 + _______ CO2 + _______ H2O

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Classify the reaction above.

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_______ Zn + _______ HCl → _______ ZnCl2 + _______ H2

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Classify the reaction above.

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_______ BaCl2 + _______ Na2SO4 → _______ BaSO4 + _______ NaCl

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Classify the reaction above.

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_______ Na+ _______ O2 → _______ Na2O

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Classify the reaction above.

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_______ CaCO3 → _______ CaO + _______ CO2

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