Question

Dilute $20.8$ mL of $6.0M{H}_{2}S{O}_4$ to a volume of $1$ L. The concentration of the resultant $H_{2}S{O}_4$ solution is $25y\times {10}^{-3}M$, then $y$ is ________.

Answer 1

The following formula is used for the dilution.
$M_1{V}_1=M_2{V}_2$.
By substituting the values in the above expression, we get
$6.00\times 20.8=M_2\times 1000$
The molarity of the diluted solution will be $0.125$ M = $125\times {10}^{-3}$ M.

hence $y$ =$5$