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Standard XII

Chemistry

Percentage Composition

The weight pe...

Question

The weight percentage of NaCl solution is 10. If the weight of the solution is 150 gms, then calculate the weight of Na and water in gms.

15,135

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25,125

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50,100

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75,75

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Solution

The correct option is A 15,135
Weight percent $= \frac{w e i g h t o f s o l u t e}{w e i g h t o f s o l u t i o n} \times 100 %$
Given, Weight percent $= 10$
Weight of solution $= 150 g m s$
$\Rightarrow 10 = \frac{w e i g h t o f s o l u t e}{150 g m s} \times 100 %$
$∴$ Weight of solute $= 15 g m s$
$∴$ Weight of water $= (150 - 15) = 135 g m s$ .

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The weight percentage of NaCl solution is 10. If the weight of the solution is 150 gms, then calculate the weight of Na and water in gms.

The correct option is A 15,135Weight percent=weightofsoluteweightofsolution×100%Given, Weight percent=10Weight of solution=150gms⇒10=weightofsolute150gms×100%∴Weight of solute=15gms∴Weight of water=(150−15)=135gms.