CBSE Class 11-science Answered

The reaction of AgNO₃ with H₂S is:

2AgNO₃ + H₂S → Ag₂S + 2HNO₃

1 mole of H₂S reacts with 2 moles of AgNO₃

So, the ratio of amount of H₂S required precipitating all the metal ions from 100 mL 1 M AgNO₃ is,

1 H₂S : 2AgNO₃

The reaction of CuSO₄  with H₂S can be represented as follows:

CuSO₄ + H₂S → CuS + H₂SO₄

Here, 1 mole of H₂S reacts with 1 mole of CuSO₄

Hence,

The ratio of amount of H₂S required precipitating all the metal ions from 100 mL 1 M CuSO₄ is,

1H₂S : 1CuSO₄