Calculate the (w/W)% of 10 g of potassium hydroxide in 40 g of solvent.

25%

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20%

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30%

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40%

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Solution

The correct option is C 20%
Weight of KOH = 10g

Weight of solvent = 40g

Total weight of solution = 40 +10 =50g

Therefore, $(\frac{w}{W})$ % = $\frac{10}{50} \times 100$ = $20$ %

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