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Question

Find the molarity of a 15% (w/w) H2SO4 solution.
(Density of the solution is 1.10 g/mL)

A
1.68 M
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B
2.45 M
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C
4.58 M
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D
8.6 M
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Solution

The correct option is A 1.68 M
15% (w/w) H2SO4 15 g H2SO4 in 100 g of solution
150 g H2SO4 in 1000 g solution
Volume of the solution=Massdensity=10001.10=909 mLMolarity=Number of moles of Solutevolume of solution in L
150×100098×909=1.68 M

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