Ch. 7  chemical equations        test                   35 points                                  chemistry

 

1. Write the chemical equation that describes the following reactions; need not balance the chemical equation; show the physical state of each chemical in the reaction.  [10 points]

a. solid sodium carbonate was added to an aqueous solution of hydrogen chloride forming liquid water, gaseous carbon dioxide, and an aqueous solution of sodium chloride.

b. Mixing aqueous solutions of calcium nitrate and potassium phosphate forms an aqueous solution of potassium nitrate and solid calcium phosphate

2. Fill-in the below blanks to balance the chemical equation using the lowest ratio of coefficients and enter “1” as appropriate.  [25 points]

a.  ___  SO2  +  ___  O2  →  ___ S  +  ___ H2O

b. ___ NH3  +  __  O2  →  ___ N2  +  ___ H2O

c. ___  NO  +  ___  H2O  →  ___ NH3  +  ___ O2

d. ___  Sr(C2H3O2)2  +  ___  Li3(PO4)   →  ___ LiC2H3O2  +  ___  Sr3(PO4)2 

e. ___   sodium hydroxide  +  ___  copper (II) chloride  →  ___ copper (II) hydroxide  +  ___  sodium chloride