Equation for the reaction of iodide to iodine using hydrogen peroxide under acidic conditions?
We know that this is a redox situation, where iodide ion is oxidized to iodine, and where hydrogen peroxide is reduced to water.

The oxidation equation is as such: $\ce{2I- -&gt; I2 + 2e-}$

The reduction equation is as such: $\ce{2H+ + H2O2 + 2e- -&gt; 2H2O}$

Therefore, the overal equation is as such: $\ce{2H+ + H2O2 + 2I- -&gt; 2H2O + I2}$

You can read more about redox reactions here.