Question

Find the molarity of resultant solution made by mixing 200ml of 98 % (w/v) H2SO4 and 800ml of 49%(w/v) H2SO4.

Answer 1

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12th

Chemistry

Solutions

Expressing Concentration of Solutions

H2SO4 solution is 98% by we...

CHEMISTRY

H

2

SO

4

solution is 98% by weight of solution with density 1.8gmL

−1

. Express concentration as percent H

2

SO

4

weight by volume of solution.

December 20, 2019avatar

Bhavan Chavan

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ANSWER

98% by weight of solution means 98g of H

2

SO

4

is present in 100g of solution.

Volume of solution =

density of solution

mass of solution

=

(1.8×1000)g/L

100g

Volume of solution =

18

1

L

Per cent H

2

SO

4

w/v of solution = molarity =

volume of solution (in L)

number of moles of H

2

SO

4

Molarity =

volume of solution

given mass of H

2

SO

4

/ molar mass of H

2

SO

4

Molarity =

1/18

98/98

=18M