Question

A solution contains 50mL of alcohol mixed with 150mL of water. Calculate concentration of this solution.

Answer 1

This solution contains a liquid solute (alcohol) mixed with a liquid solvent (water), so we have to calculate the concentration of this solution in terms of volume percentage of solute (alcohol). Now, we know that :

Here, Volume of solute (alcohol) = 50mL

And. Volume of solvent (water) = 150mL

So, Volume of solution = Volume of solute + Volume of solvent

= 50 + 150 = 200mL

Now, putting these values of ‘volume of solute’ and ‘volume of solution’ in the above formula we get :

Concentration of solution 25/200 x 100 = 50/2 = 25 percent (by volume)

Thus, the concentration of this alcohol solution is 25 per cent or that it is a 25%.