Answer to Question #103314 in General Chemistry for Mari

Question

What volume of 0.220 MM ethanol solution contains each of the following number of moles of ethanol?

a) 0.47 molmol ethanol

5) 1.20 molmol ethanol

c) 1.2×10−2 molmol ethanol

Answer 1

Molarity$(M)=\frac{N_{mol}}{V_{sol}}$

where $N_{mol}$ is number of moles of solute and $V_{sol}$ is volume of solution.

$\implies V_{sol}=\frac{N_{mol}}{M}$

Given,The solution has $M=0.220 \ mol/L$ .

$a)$ $0.47$ mol ethanol 

$N_{mol}=0.47$

$\implies V_{sol}=\frac{0.47}{0.220}=2.13\ L$

$b) \ 1.20$ mol ethanol

$N_{mol}=1.20$

$\implies V_{sol}=\frac{1.20}{0.220}=5.45\ L$

$c)\ 1.2\times 10^{-2}$ mol ethanol

$N_{mol}=1.2\times 10^{-2}$

$\implies V_{sol}=\frac{1.2\times10^{-2}}{0.220}=5.45\times 10^{-2}\ L=54.5\ ml$