Why only `As^(+3)` gets precipitated as `As_(2)S_(3)` and not `Zn^(+2)` as ZnS when `H_(2)S` is passed through an acidic soluiotn containing `As^(+3)` and `Zn^(+2)` ?

Why only As^(+3) gets precipitated as As_(2) S_(3) and not Zn^(2+) as ZnS when H_(2) S is passed through an acidic solution containing As^(+3) and Zn^(+2) ?

Why only As^(+3) gets precipitated as As_(2) S_(3) and not Zn^(2+) as ZnS when H_(2) S is passed through an acidic solution containing As^(+1) and Zn^(+2) ?

Why does not ZnS get precipitated when H_2S is passed through an acidic solution of Zn -salt?

Explain what happens when H_2S gas is passed through acidified mixture of the solutions of Cu^(2+) and Zn^(2+) .

Both Cus and ZnS are precipitated if H_(2)S gas is passed through an alkaline solution of Cu^(2+) and Zn^(2+) . Explain.

Explain giving reasons why (Give equations in support of your answer) :^(**"**) Cu is precipitated as Cus while Zn is not precipitated when H_2S is passed through an acidic solution of Cu(NO_3)_2 and Zn(NO_3)_2 respectively.

When H_(2)S gas is passed through an acidified solution of Cu^(2+) and Zn^(2+) , only CuS is precipitated-why?

When H_(2)S gas is passed through ZnCl_(2) solution. ZnS is not precipitated, why?