Name________________________________________________ Date________________________ Class_____________________

Chemical Reactions Review

Reviewing VocabularyMatch the definition in Column A with the term in Column B.

Column A Column B

________ 1. A reaction in which a compound breaks down into two or more elements or new compounds

________ 2. A number written in front of a chemical formula

________ 3. A solid produced during a chemical reaction in a solution

________ 4. When something is dissolved in water

________ 5. A statement that uses chemical formulas to show the identities and relative amounts of the substances involved in a chemical reaction

_______ 6. A reaction in which oxygen combines with a substance and releases heat and light energy

_______ 7. A reaction in which the atoms of one element replace the atoms of another element in a compound

_______ 8. A reaction involving the exchange of positive ions between two compounds dissolved in water

_______ 9. The process by which the atoms of one or more substances are rearranged to form different substances

_______ 10. A starting substance in a chemical reaction

_______ 11. A substance formed during a chemical reaction

_______ 12. A reaction in which two or more substances react to produce a single product

a. aqueous solution

b. chemical equation

c. chemical reaction

d. coefficient

e. combustion reaction

f. decomposition reaction

g. double-replacement reaction

h. precipitate

i. product

j. reactant

k. single-replacement reaction

l. synthesis reaction

Name____________________________________________ Date______________________ Class_______________________

Add the appropriate coefficient to balance the following chemical equations. Then identify the type of equation. Synthesis (S), Decomposition (D), Single Replacement (SR), Double Replacement (DR), Combustion (C)

_______13. ________ Al(s) _________ Cl2(g) _______ AlCl3(s)

_______14. ________S8(s) _______ Cu(s) _________ Cu2S(s)

_______15. ________ Cu(NO3)2(aq) _________ NaOH(aq) Cu(OH)2(s) ________ NaNO3(aq)

_______16. ________ SO2(g) O2(g) _______ SO3(g)

_______17. ________H3PO4(aq) ______ KOH(aq) _______ H2O(l) K3PO4(aq)

_______18. ________C3H8(g) _______ O2(g) ________ CO2(g) ______ H2O(g)

19. Explain why the following equation is not correctly balanced.

Sc2O3(s) 3H2O(l) 2ScOH3

20. Write and balance this equation.

Sodium metal plus chlorine gas combine to form solid sodium chloride.

21. When sodium metal is placed in a beaker of water, hydrogen gas and sodium hydroxide solution are formed.

22. Change these reactions into word equations.

a. H2O → H2 + O2

b. Cu(NO3)2(aq) NaOH(aq) Cu(OH)2(s) NaNO3(aq)