Question

2. A solution is made by adding 25 ml of benzene to 80ml of toluene. What is the percent by volume of benzene?​

Answer 1

Answer:

Volume of benzene (solute) = 25mL

Volume of solution = 80mL

% volume conc. = volume of solute/volume of solution × 100%

% volume conc. = 25/80 × 100%

% volume conc. = 31.25%

The %concentration by volume of benzene in toluene is therefore 31.25%.

Answer 2

Given - Volume of benzene: 25 ml

The volume of toluene: 80 ml

To find: Percent by volume of benzene

Solution - Benzene will be taken as a solute for the solution of benzene and Toluene. Hence, the volume of solute = 25 ml

The volume of solvent = 80 ml

Thus, the volume of solution = volume of solute + volume of solvent

The volume of solution = 25 + 80

The volume of solution = 105 ml

Percent by volume of benzene = volume of solute/volume of solution*100

Percent by volume of benzene = 25/105*100

Percent by volume of benzene = 23.8%

Hence, percent by volume of benzene is 23.8%.