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Question

The molarity of a solution when 245 g of H2SO4 is dissolved in 1 L of solution is .

A
2.5
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B
9.6
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C
10
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Solution

The correct option is A 2.5
Given mass of H2SO4 = 245 g
Gram molecular mass of H2SO4 = 2(1)+ 32 + 4(16) = 98 g

Number of moles = Mass in gramsGram molecular mass

= 24598

= 2.5 moles

Molarity is defined as the number of moles of solute present in 1 L of solution.

M = Number of moles of soluteVolume of solution in litres

= 2.51

= 2.5 M

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