The ratio of amounts of H2S needed to precipitate all the metals ions from 100 ml of 1 M AgNO3 and 100 ml of 1 M CuSO4 is :

  • Option 1)

    1:2

  • Option 2)

    2:1

  • Option 3)

    Zero

  • Option 4)

    Infinite

 

Answers (1)

As discussed in

Mole Fraction -

It is ratio of moles of solute or moles of solvent to moles of solution.

- wherein

If a substance ‘A’ dissolves in substance ‘B’ and their number of moles are nA and nB respectively; then the mole fractions of A and B are given as

Mole fraction of A = (number of moles of A)/(number of moles of solution ) = nA/(nA+ nB)

 

 

 2 AgNO_{3}+H_{2}S \rightarrow Ag_{2}S+2HNO_{3}

1 Molel H2S react with 2moles AgNo3

ratio (H2S:AgNO3)1:2

CUSO_{4}+H_{2}S\rightarrow CuS+H_{2}SO_{4}

Ratio(H_{2}S:CuSO_{4})=1:1

Required\: Ratio =\frac{\frac{1}{2}}{\frac{1}{1}}

=1:2


Option 1)

1:2

Option is Correct

Option 2)

2:1

Option is incorrect

Option 3)

Zero

Option is incorrect

Option 4)

Infinite

Option is incorrect

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