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Question

If 25% (w/v) of solution has a density of 1.12 g ml−1, then:

A
weight of the solvent in 100 ml of solution is 87 g
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B
weight of the solution per 100 ml is 106 g
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C
weight of the solution per 100 ml is 112 g
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D
weight of the solution per 100 ml of solution is 100 g
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Solution

The correct options are
C weight of the solvent in 100 ml of solution is 87 g
D weight of the solution per 100 ml is 112 g
25% w/v mean that 25g solute dissolved in 100ml solution
density = 1.12
massofsolutionvolumeofsolution=1.12
mass of solution = 112 in 100 ml solution
mass of solvent =11225
=879 in 100ml solution.

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