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Solutions

Question

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

0.875 M

1.00 M

1.75 M

0.0975 M

Solution

A.

0.875 M

M₁V₁ + M₂V₂ = MV

straight M space equals fraction numerator straight M subscript 1 straight V subscript 1 space plus straight M subscript 2 straight V subscript 2 over denominator straight V end fraction space equals space fraction numerator 0.5 space straight x 750 plus 2 space straight x 250 over denominator 1000 end fraction

M= 0.875

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