When `Cu^(2+)` ion is treated with KI, a white precipitate is formed. Explain the reaction with the help of chemical equation.

Explanation

`i^(-)` ion is a strong reducing agent. It reduces `Cu^(2+)` to `Cu^(+)`
`2Cu^(2+) + 4I^(-) rarr underset("(white ppt.)")(Cu_(2)I_(2)) + I_(2)`