Question

Solution A contains 30g of acid in 500cm3 of water and solution B contains 15g of acid in 250cm3 of water. Which one is more concentrated? Show your working.

Answer 1

The concentration of an acid solution can be measured by the formula:

(weight of acid)/(volume of solution) X 100 %

Solution A:

Concentration = 30/500 X 100 => 6 % w/v acid solution

Solution B:

Concentration= 15/250 X 100 => 6   % w/v acid solution

Hence, both solution A and solution B are of the same concentration.