Question

10 litres of water is added to 50 litres of a solution containing 20% of alcohol in water . What is the strength of alcohol in the solution now ?

Answer 1

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Answer 2

The strength of alcohol in the solution now is 16.7 %

Explanation:

According to the dilution law,

$C_1V_1=C_2V_2$

where,

$C_1$ = concentration of pure solution = 20 %

$V_1$ = volume of pure acid solution = 50 L

$C_2$ = concentration of diluted solution= ?

$V_2$ = volume of diluted solution= (50+10)L = 60 L

$20\times 50=C_2\times 60$

$C_2=16.7$

Thus the strength of alcohol in the solution now is 16.7 %

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