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Question

Concentrated aqueous sulphuric acid is 98% H2SO4 by mass and has a density of 1.80 g mL1. Volume of acid required to make one litre of 0.1 M H2SO4 is:

A
5.55 mL
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B
11.10 mL
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C
16.65 mL
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D
22.20 mL
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Solution

The correct option is A 5.55 mL

98% by weight H2SO4=98 g H2SO4100 g solution

Volume of 100 g solution =massdensity=1001.8=55.55 mL

For, 0.1 M, we need 9.8 g H2SO4

55.55 mL acid=98 g

5.55 ml acid=9.8 g=0.1 Molar acid


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