Chemical Reaction Review

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Chapter 8 Assignment

Chemical Reaction Review

Chemical Reactions • Multiple Choice + Short Answer • Submit for Grade at the End

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Multiple Choice

1. When a solid produced by a chemical reaction separates from the solution it is called

a. a precipitate. b. a reactant. c. a molecule. d. the mass of the product.

2. What is the small whole number that appears in front of a formula in a chemical equation?

a. a subscript b. a superscript c. a ratio d. a coefficient

3. A chemical equation is balanced when the

a. coefficients of the reactants equal the coefficients of the products. b. same number of each kind of atom appears in the reactants and in the products. c. products and reactants are the same chemicals. d. subscripts of the reactants equal the subscripts of the products.

4. In what kind of reaction do two or more substances combine to form a new compound?

a. decomposition reaction b. ionic reaction c. double-displacement reaction d. synthesis reaction

Short Answer

5. A properly written chemical equation must contain known facts, ________________, and the law of conservation of mass must be satisfied.

6. A formula equation is an equation in which the ____________________ are represented by symbols and formulas.

7. ___________________ provide valuable information such as the number of moles or atoms of the elements or formulas contained in the equation.

8. What does the symbol “(aq)” in a chemical reaction represent?

9. What are “coefficients” in a chemical reaction?

10. Explain the difference between a single replacement and a double displacement reaction.

11. Explain how you can recognize a combustion reaction.

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