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Q.

25 mL of HCl solution is titrated with 0.10 mole L–1 NaOH solution in a conductivity cell. The data obtained were plotted to give the graph shown below

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The concentration of HCl solution is

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a

0.060 M

b

0.040 M   

c

0.080 M   

d

0.01 M    

answer is C.

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Detailed Solution

When 20 ml of NaOH is added, equivalents point is reached.

Equivalents of HCl = Equivalents of NaOH

25 x 10-3 x M = 10-1 x 20 x 10-3

M=2025×10=0.08M

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