Q.

The density of 1.48 mass percent calcium hydroxide solution is 1.025 g mL-1. The volume of 0.1 M HCI solutions required to neutralise 25 mL of this solution is

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a

102.5 mL

b

95.5 mL

c

90.0 mL

d

85.5 mL

answer is A.

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Detailed Solution

Mw of Ca(OH)2=74g Ew of Ca(OH)2=742=37gNCa(OH)2=% by weight ×10×dEw2=1.48×10×1.02537=0.41mEq of Ca(OH)2 ≡mEq of HCl25 mL ×0.41 N ≡0.1×VHClVHCl=102.5 mL
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