The molarity of a solution obtained by mixing 750 mL of 0.5M HCl with 250 mL of 2M HCl will be:
(IIT-JEE-2013)

1.00 M

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1.75 M

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0.975 M

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0.875 M

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Solution

The correct option is D 0.875 M
$M_{1} V_{1} + M_{2} V_{2} = M V$
$M = \frac{M_{1} V_{1} + M_{1} V_{2}}{V} = \frac{0.5 \times 750 + 2 \times 250}{1000}$
M = 0.875

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