Question

If $50mL$ of $0.1M$ $HCl$ and $200mL$ of $0.01M$$HCl$ are mixed together. The molarity of mixture will be:

• A. $0.28$ M
• B. $2.8$ M
• C. $0.028$ M
• D. $28.57$ M

Answer 1

The correct option is C $0.028$ M

$M_{\left(mixture\right)}=\frac{M_1{V}_1+M_2{V}_2}{V_1+V_2}$

$=\frac{(0.1\times 50)+(0.01\times 200)}{(50+200)}$

$=\frac{5+2}{250}=\frac{7}{250}$

Molarity of mixture$=0.028$ m.

Hence, option C is correct.