Respuesta :

Willchemistry

Hey there!


V/V % = ( volume of solute ( mL ) / volume solution ) * 100


volume solute = 25 mL acetone


Volume solvent = 75 mL water


So :


v/v =        25

            ------------ * 100

              25 + 75


v/v = ( 25 / 100 ) * 100


v/ v = 25%


hope this helps!

lyespitiar

Answer:

The answer is: 25 %

Explanation:

In order to know the concentration, we need to know the amount of solution we have, that is:  25 ml of acetone + 75 ml of water = 100 ml of solution. Now, as the units are in volume, and we need to know te concentration in %v/v (percentage volume/volume), we can operate normally (in the same units). The concentration in % v/v is going to to be the amount of the solute over the amount of solution multiplied by 100, and in this case the solute is the acetone:

%v/v = (25/100) * 100 = 25 %