Q.

To 1 L of 1.0 M impure H2SO4 sample, 1.0 M NaOH solution was added and a plot was obtained as follows:The % purity of H2SO4   is

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a

65%

b

75%

c

85%

d

50%

answer is B.

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Detailed Solution

(i) Mole of NaOH=1.0M×1.5L=1.5molMole of H2SO4=1.0M×1L=1.0 mol2NaOH2mol+H2SO4⟶Na2SO4+2H2O1molMoles of H2SO4 reacted with NaOH=12mol of NaOH=12×1.5=0.75molH2SO4% purity of H2SO4=0.75mol×1001.0mol=75%
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