How many ions when react with NaOH (excess), precipitate is formed which is insoluble in excess NaOH
Bi³⁺, Cd²⁺, Zn²⁺, Al³⁺, Pb²⁺, Sn²⁺, Mn²⁺, Co²⁺, Cu²⁺

Question

How many ions when react with NaOH (excess), precipitate is formed which is insoluble in excess NaOH Bi³⁺, Cd²⁺, Zn²⁺, Al³⁺, Pb²⁺, Sn²⁺, Mn²⁺, Co²⁺, Cu²⁺

TestHub · Accepted Answer

On adding NaOH (excess), hydroxides of Zn²⁺, Al³⁺, Pb²⁺, and Sn²⁺ dissolve due to amphoteric nature. Hydroxides of Bi³⁺, Cd²⁺, Mn²⁺, Co²⁺, and Cu²⁺ remain insoluble in excess NaOH. Therefore, the number of ions giving a precipitate insoluble in excess NaOH is 5.

Chemistry - Salt Analysis Question with Solution | TestHub

Doubts & Discussion