# Question #1a210

Jan 9, 2015

The answer is $\text{16 mL}$.

In order to solve this problem, you need to use the following equation $\text{M"_1"V"_1}$ = $\text{M"_2"V"_2}$, in which $\text{M}$ is molarity and $\text{V}$ is volume.

Known/Given:
$\text{M"_1}$ = $\text{6.0 M HCl}$
$\text{M"_2}$ = $\text{0.800 M HCl}$
$\text{V"_2}$ = $\text{120.0 mL}$

Unknown:
$\text{V"_1}$

Equation:
$\text{M"_1"V"_1}$ = $\text{M"_2"V"_2}$

Solution: Rearrange the equation to isolate $\text{V"_1}$ and solve for $\text{V"_1}$.

$\text{V"_1}$ = $\text{M"_2"V"_2"/M"_1}$ = $\text{0.800 M x 120.0mL"/"6.0 M}$ = $\text{16 mL}$