# What is the net ionic equation of 2H^+ + SO_4^(2-) + Ca^(2+) + 2I^- -> CaSO_4 + 2H^+ + 2I^-?

Mar 25, 2017

Simply cancel out the ions that are COMMON as reactants and products......

#### Explanation:

$\cancel{2 {H}^{+}} + S {O}_{4}^{2 -} + C {a}^{2 +} + \cancel{2 {I}^{-}} \rightarrow C a S {O}_{4} \left(s\right) \downarrow + \cancel{2 {H}^{+}} + \cancel{2 {I}^{-}}$

to give.......

$C {a}^{2 +} + S {O}_{4}^{2 -} \rightarrow C a S {O}_{4} \left(s\right) \downarrow$

And the questions you've gots to be asking yourself are:

$\text{(i) Is mass balanced?}$

$\text{(ii) Is charge balanced?}$

Well are they? If they are not, then you have not made a reasonable representation of chemical reality. $C a S {O}_{4}$ is reasonably insoluble in aqueous solution, and it precipitates from solution as a white solid.