Question

A litre of pure alcohol is added to 6 litres of 30% alcohol solution. the percentage of water in the solution is

Answer 1

use the formula i.e percentage by mass= mass of solute/mass of solution putting the in formula.

Answer 2

Answer:

Alcohol =

30

× 6 = 1.8 litres

100

Water = 4.2 litres

On mixing 1 litre of pure alcohol,

Percentage of water =

4.2

× 100 = 60%

7

Explanation: