is passed into one 
of a solution containing 0.1 mole of 
and 0.01 mole of 
till the sulphide ion concentration reaches 
moles. Which one of the following statements is true? [ 
of 
and 
are 
and 
respectively]
precipitate
Text Solution
Verified by ExpertsB
: Precipitation occurs only when ionic product exceeds the value of solubility product.
of a solution containing 0.1 mole of 
, 0.01 mole of 
and 
mole of 
. Let us calculate the ionic product in each case.
Ionic product of 
Ionic product 
.
Ionic product of 
But it has 
Ionic product 
Both 
and CuS have less 
values than their respective ionic products so 
and 
both precipitates.
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