PART II
For each of the following chemical reactions, write out the reaction in words. Don’t worry about balancing the reactions. Some of the chemicals may be in the lists of common acids or common gases.

5. H2(g) + O2(g) —> H2O(l)

“Hydrogen gas and oxygen gas react to form liquid water.”

6. CaO(s) + CO2(g) —> CaCO3(s)

7. Pb(CH3CO2)2(aq) + NaI(aq) —> PbI2(s) + NaCH3CO2(aq)

8. Zn(s) + HCl(aq) —> ZnCl2(aq) + H2(g)

9. Fe(s) + O2(g) —> Fe2O3(s)

10. AgNO3(aq) + KBr(aq) —> AgBr(s) + KNO3(aq)

PART III
For each of the following chemical sentences, write out the reaction in as an equation. Don’t worry about balancing the reactions.

11. “Hydrogen gas and oxygen gas react to form liquid water.”

H2(g) + O2(g) —> H2O(l)

12. Hydrogen chloride gas reacts with solid sodium sulfide to make solid sodium chloride and hydrogen sulfide gas.

13. Dissolved barium nitrate reacts with dissolved potassium sulfate to form solid barium sulfate and potassium nitrate solution.

14. Aqueous hydrochloric acid reacts with solid sodium bicarbonate to form carbon dioxide gas and a salt water solution.

15. Aqueous ammonium hydroxide decomposes to produce liquid water and ammonia gas.

16. Copper metal corrodes slowly in oxygen to form a “patina” of solid copper(II) oxide.

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