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

Options

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

Answer

A

Explanation

Let the molarity of mixed HCl solution be `M_(mix)`
`M_(mix)(V_(1)+V_(2))=M_(1)V_(1)+M_(2)V_(2)`
`therefore M_(mix)=(M_(1)V_(1)+M_(2)V_(2))/(V_(1)+V_(2))`
`=(0.5xx750+2xx250)/(750+250)=0.875` (M)