Question

The molarity of a solution obtained by mixing 750 mL of 0.5 M HCl with 250 mL of 2 M HCl will be
A. `0.975 M`
B. `0.875 M`
C. `1.00 M`
D. `1.75 M`

Answer 1

Correct Answer - B
`M_(1)V_(1)+M_(2)V_(2)=M_(3)(V_(1)+V_(2))`
`0.5xx750+2xx250=M_(3)(750+25)`
`375+500=1000M_(3)`
`therefore" "M_(3)=(875)/(1000)=0.875M.`