Question

A solution is 5.00% by volume of ethanol dissolved in water. How many mL of ethanol are in 500 mL of the solution?

Answer 1

Answer:

$v_{solute}=25mL$

Explanation:

Hello there!

In this case, according to the by-volume concentration of this solution, it is possible for us to use its mathematical definition as shown below:

$\%v=\frac{v_{solute}}{v_{solution}}*100\%$

Thus, given the percent and the volume of the solution, we can solve for the volume of ethanol (solute) as shown below:

$v_{solute}=\frac{\%v*v_{solution}}{100\% }\\\\v_{solute}=\frac{5.00\%*500mL}{100\%}\\\\ v_{solute}=25mL$

Best regards!