Page 1 of I Homework#7 (Due l0/16) CHEM 118 Part A For each of the following com

Question

Page 1 of I Homework#7 (Due l0/16) CHEM 118 Part A For each of the following combinations of reactants, do the following: Name: Predict possible products with phase labels Write the balanced chemical equation. if no visible reaction occurs, write NR. If a precipitate forms, give the formula and name of the precipitate. Write the complete ionic equation and net ionic equation for all reactions (whether or not a visible reaction occurs). 5. Solutions of calcium chloride and potassium phosphate are mixed. Fall 2017 Dr. Wilson

Explanation / Answer

1.

Molecular equation:

Na2S (aq.) + ZnSO4 (aq.) ---------------> ZnS (s) + Na2SO4 (aq.)

Complete ionic equation:

2 Na+ (aq.) + S2- (aq.) + Zn2+ (aq.) + SO42- (aq.) -------> ZnS (s) + 2 Na+ (aq.) + SO42- (aq.)

Net ionic equation:

S2- (aq.) + Zn2+ (aq.) ----------> ZnS (s)

2.

Molecular equation:

Al(NO3)3 (aq.) + Na3PO4 (aq.) --------> AlPO4 (s) + 3 NaNO3 (aq.)

Complete ionic equation:

Al3+ (aq.) + 3 NO3- (aq.) + 3 Na+ (aq.) + PO43- (aq.) ------> AlPO4 (s) + 3 Na+ (aq.) + 3 NO3- (aq.)

Net ionic equation:

Al3+ (aq.) + PO43- (aq.) -------------> AlPO4 (s)

3.

Molecular equation:

(NH4)2CO3 (aq.) + MgSO4 (aq.) ---------> MgCO3 (s) + (NH4)2SO4 (aq.)
Complete ionic equation:

2 NH4+ (aq.) CO32- (aq.) + Mg2+ (aq.) + SO42- (aq.) -----> MgCO3 (s) + 2 NH4+ (aq.) + SO42- (aq.)

Net ionic equation:

CO32- (aq.) + Mg2+ (aq.) -------------> MgCO3 (s)
4.

Molecular equation:

Pb(NO3)2 (aq.) + 2 LiI (aq.) -----------> PbI2 (s) + 2 LiNO3 (aq.)

Complete ionic equation:

Pb2+ (aq.) + 2 NO3- (aq.) + 2 Li+ (aq.) + 2 I- (aq.) -------> PbI2 (s) + 2 Li+ (aq.) + 2 NO3- (aq.)

Net ionic equation:

Pb2+ (aq.) + 2 I- (aq.) -------------> PbI2 (s)

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