Question

Concentrated hydrochloric acid is 36% by mass has density of 1.18g /ml. how many grams of pure hydrochloric acid are present in 250ml of this solution? ​

Answer 1

mass%=36

36gram solute in 100 gm solution

density=mass. =1.18

volume

and rest you solve

Answer 2

Density = 1.18 g/mL

Volume of solution = 250 mL

D = m/v

Mass of solution = Density x volume => 1.18 x 250

=> 295 grams.

Hence, 36 % of 295 grams is pure conc. HCl

36/100 * 295 => 106.2 grams of pure hydrochloric acid are present.