# Question #a18e4

Feb 10, 2015

The dilution factor will be 500, or 1:500.

Basically, you start with the volume of steel-acid solution you have in the $\text{100-mL}$ flask. For a solution, the dilution factor is defined as the ratio between the final volume - after the dilution - and the initial volume - before the dilution

$\text{DF" = V_"final"/V_"initial}$

Your initial volume before the dilution will be $\text{1 mL}$, the aliquot you take from the solution you've prepared. After you dilute the aliquot, the final volume will be $\text{500 mL}$. As a result,

$\text{DF" = V_"final"/V_"initial" = "500 mL"/"1 mL" = "1:500}$

This is the equivalent of adding $\text{499 mL}$ to your $\text{1-mL}$ aliquot for a dilution factor of 1/500.