Question

I really need help with this chem question. Can anybody answer it with an explanation for the answer? Thanks.

Which is the correct net ionic equation for the following reaction:
2HI (aq) + Ca (OH)2 (aq) arrow CaI2 (aq) + H2O (l)?


A.) H+ (aq) + Ca+2 (aq) + 2 I− (aq) arrow CaI2 (aq)

B.)Ca+2 (aq) + 2 OH− (aq) to Ca(OH)2 (aq)

C.)H+ (aq) + OH− (aq) to H2O (l)

D.)2HI (aq) + Ca (OH)2 (aq) to CaI2 (aq) + H2O (l)

Answer 1

C. Because you eliminate "spectator ions" or ions that are repeated and you can only do that to aqueous. So, Ca +2 and 2I -1 are the only ones you can remove for net ionic.