Question

Please help me write molecular , total, net ionic equation for the following reactions:

Ca(NO3)2 +NaCl

Na2CO3 + Ca(NO3)2

Na2SO4 + CuCl2

Na2SO4 +Pb(NO3)2

Pb(NO3)2 +CuCl2

AgNO3 + Na2SO4

AgNO3 +CuCl2

Answer 1

Molecular equation

Ca(NO3) 2 (aq) + 2 NaCl (aq) $\rightarrow$ No reaction Possible products are CaCl 2 and NaNO3. Both products are water soluble , they are present in the form of ions. Hence, we can assume reaction is not happening.

Molecular equation	Na2CO 3 (aq) + Ca(NO3) 2 ( aq) $\rightarrow$ CaCO 3 (s) + 2 NaNO 3 (aq)
Total Ionic equation	2 Na + (aq) +  CO3 2- (aq) + Ca 2+ (aq) + 2 NO 3- (aq) $\rightarrow$ CaCO 3 (s) + 2 Na + (aq) +  2 NO 3- (aq)
Net ionic equation	Ca 2+ (aq) + CO3 2- (aq) $\rightarrow$ CaCO 3 (s)

Molecular equation

Na2SO4 (aq) + CuCl2 (aq) $\rightarrow$   No reaction Products CuSO4 and NaCl are water soluble. They are present in the form of ions in the solution , hence we can assume there is no reaction.

Molecular equation	Na2SO4 (aq) + Pb(NO3) 2 (aq) $\rightarrow$ PbSO 4 (s) + 2 NaNO 3 (aq)
Total Ionic equation	2 Na+ (aq) + SO 42- (aq) + Pb 2+ (aq) + 2 NO 3- (aq) $\rightarrow$ PbSO 4 (s) + 2 Na+ (aq) + 2 NO 3- (aq)
Net ionic equation	Pb 2+ (aq) +SO 42- (aq) $\rightarrow$ PbSO 4 (s)

Molecular equation	Pb(NO3) 2 (aq) + CuCl 2 (aq) $\rightarrow$ PbCl 2 (s) + Cu (NO3) 2 (aq)
Total Ionic equation	Pb 2+ (aq) + 2 NO 3- (aq) + Cu 2+ (aq) + 2 Cl - (aq) $\rightarrow$ PbCl 2 (s) + Cu 2+ (aq) + 2 NO 3- (aq)
Net ionic equation	Pb 2+ (aq) + 2 Cl - (aq) $\rightarrow$ PbCl 2 (s)

Molecular equation	2 AgNO 3 (aq) + Na2SO4 (aq) $\rightarrow$   Ag2SO4 (s) + 2 NaNO 3 (aq)
Total Ionic equation	2 Ag + (aq) + 2 NO 3- (aq) + 2 Na+ (aq) + SO 42- (aq) $\rightarrow$   Ag2SO4 (s) + 2 Na+ (aq) +  2 NO 3- (aq)
Net ionic equation	2 Ag + (aq) +  SO 42- (aq) $\rightarrow$   Ag2SO4 (s)

Molecular equation	2 AgNO 3 (aq) + CuCl 2 (aq) $\rightarrow$ 2 AgCl (s) + Cu(NO 3 ) 2 (aq)
Total Ionic equation	2 Ag + (aq) + 2 NO 3- (aq) + Cu 2+ (aq) + 2 Cl - (aq) $\rightarrow$ 2 AgCl (s) + Cu 2+ (aq) +  2 NO 3- (aq)
Net ionic equation	2 Ag + (aq) + 2 Cl - (aq) $\rightarrow$ 2 AgCl (s) or Ag + (aq) + Cl - (aq) $\rightarrow$ AgCl (s)