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)