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Question

The weight of mixture containing HCl and H2SO4 is 0.1g on treatment with an excess of an AgNO3 solution, reacted with this acid mixture gives 0.1435g of AgCl, weight percentage of H2SO4 in mixture is:

A
36.5
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B
63.5
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C
50
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D
80
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Solution

The correct option is A 63.5
Let mass of HCl be x
Mass of H2SO4 is 0.1x
Moles of HCl=x36.5
HCl+AgNO3AgCl+HNO3
Moles of HCl= moles of AgCl
Moles of AgCl=0.1435143.3=103 moles
x36.5=103
x=36.5×103
Weight of HCl=0.0365 g
Weight of H2SO4=0.0635
% weight of H2SO4=0.06350.1×100=63.5%

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