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Question

1 L of a N2HCl solution is heated in a beaker. It was observed that when the volume of the solution was reduced to 600 mL, 3.25 g of HCl is lost. Calculate the normality of the new solution.

A
1.70 N
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B
0.685 N
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C
0.342 N
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D
0.171 N
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Solution

The correct option is B 0.685 N
Normality=number of gram equivalentstotal volume of the solution in L
Number of gram equivalents of HCl = 0.5
Mass of HCl in solution =0.5×36.5=18.25 g
Mass of HCl remaining =18.253.25=15 g
Number of gram equivalents of HCl =1536.5
New volume =0.6 L
New normality 15/36.50.6=0.685 N

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