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Pure sulphuric acid is a liquid of 1:84 density. What volume of it would be requ...


Question

Pure sulphuric acid is a liquid of 1:84 density. What volume of it would be required to prepare 250 cm3 of 2.0 M solution?

(H = 1, S = 32, O = 16)

Options

A)
2.00
B)
2.66
C)
3.00
D)
3.66
E)
4.00

The correct answer is B.

Explanation:

1000 cm3 of 1 m H2SO4 contains 98 gm of H2SO4
250 of 1 m H2SO4 (98)/(4) x (2)/(10) = 4.9 gm
But density = (mass)/(volume)
Volume = (Mass)/(Density) (4.90)/(1.84) = 2.66

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Dicussion (1)

  • 1000 cm3 of 1 m H2SO4 contains 98 gm of H2SO4
    250 of 1 m H2SO4 (98)/(4) x (2)/(10) = 4.9 gm
    But density = (mass)/(volume)
    Volume = (Mass)/(Density) (4.90)/(1.84) = 2.66

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