Passing (H\_2 S) gas integralo a mixture of (Mn^{2+}, Ni^{2+... | Chemistry | SolveeIt | Solveeit

Today, August 18

Question

Passing $H_2 S$ gas into a mixture of $Mn^{2+}, Ni^{2+}, Cu^{2+}$ and $Hg^{2+}$ ions in an acidified aqueous solution precipitates

A

CuS and HgS

B

MnS and CuS

C

MnS and NiS

D

NiS and HgS

Answer

CuS and HgS

Explanation

Solution

In acidic medium, $H_2 S$ is very feebly ionised giving very small concentration of sulphide ion for precipitation. Therefore, the most insoluble salts CuS and HgS are precipitated only.