Question

You have 57.0 mL of a 0.400 M stock solution that must be diluted to 0.100 M. Assuming the volumes are additive, how much water should you add?

Answer 1

\[M _{1}\times V _{1} = M _{1}\times V _{1}\]
\[4 \times 57=1\times V _{2}\]
\[V _{2} =228 ml\]
\[V _{water added} =228-57=171ml\]