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What is maximum pH required to prevent t...

What is maximum pH required to prevent the precipitation of ZnS in a solution that is 0.01 M `ZnCl_(2)` and saturated with 0.10M `H_(2)S`?
[Given : `K_(sp)(ZnS)=10^(-21),`
`K_(a_(1))xxK_(a_(2))` (of `H_(2)S`)=`10^(-20)`]

A

0

B

1

C

2

D

4

Text Solution

Verified by Experts

The correct Answer is:
B
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What is the minimum pH required to prevent the precipitation of ZnS in a solution which is 0.01 M ZnCl_2 and saturated with 0.1 M H_2S ? K_(sp)" of " (ZnS)=10^(-21),K_(a_1)xxK_(a_2)(H_2S)=10^(-20)

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