When aqueous solutions of ammonium phosphate and chromium(II) iodide are combined, solid chromium(II) phosphate and a solution of ammonium iodide are formed. The net ionic equation for this reaction is: (Use the solubility rules provided in the OWL Preparation Page to determine the solubility of compounds.)

The net ionic equation for this reaction is as follows

Explanation:

2Cr3+(aq) + 3CO32-(aq) - - - - - > Cr2(CO3)3(s)

Explanation

The Chromium carbonate is insoluble compound, so there is a reaction

The Total ionic equation is

2Cr3+(aq) + 6NO3-(aq) + 6NH4+(aq) + 3CO32- (aq) - - - - - - > Cr2(CO3)3(s) + 6NH4+ (aq) + 6NO3- (aq)

The Ions NH4+ and NO3- are spectator ions, so after the removing these ions net ionic equation is

2Cr3+(aq) + 3CO32-(aq) - - - - - > Cr2(CO3)3 (s)

the answer is d. 74.02