Q4 / 90 · JEE Main 2013 (07 Apr) · Chemistry

The molarity of a solution obtained by mixing $750 mL$ of $0.5 (M) HCl$ with $250 mL$ of $2 (M) HCl$ will be

A
$1.75 M$
B
$0.975 M$
Correct answer
C
$0.875 M$
D
$1.00 M$

Solution

M = \frac{M_{1} V_{1} + M_{2} V_{2}}{V_{1} + V_{2}}

= \frac{750 \times 0.5 + 250 \times 2}{1000}

= \frac{375 + 500}{1000} = 0.875 M

Hence, the correct answer is option: 'C'.

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