Question

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

• A. 0.875 M
• B. 1.00 M
• C. 1.75 M
• D. 0.975 M

Answer 1

The correct option is A 0.875 M

The molarity of a solution obtained by mixing 750 mL of 0.5M $HCl$ with 250 mL of 2M $HCl$ given by
$Molarity=\frac{M_1{V}_1+M_2{V}_2}{V_1+V_2}$
$\text{Molarity}=\frac{750\times 0.5+250\times 2}{1000}=0.875M$