Iodometric Titration is an indirect method where iodine is liberated and then titrated.

1. Step: The unknown oxidizing agent (like $K_{2}C{r}_2{O}_7$) is reacted with an excess of Potassium iodide ($KI$) in acidic medium. $C{r}_2{O}_7^{2-}+14H^{+}+6I^{-}\to 2C{r}^{3+}+3I_2+7H_{2}O$
2. Step: The liberated Iodine ($I_2$) is then titrated with a standard Sodium thiosulfate ($N{a}_2{S}_2{O}_3$) solution using starch as an indicator.

• This contrasts with Iodimetric titrations, where iodine is the direct titrant.