Calculate the mass of KCl in a 3.35% KCl solution that has a mass of 155.0 g.

Answer 1

You don't necessarily need to approach this like a chemistry problem.

% KCl = (mass KCl / total mass of solution)100

%KCl = 3.35

mass KCl = ?

total mass of solution = 155.0 g

3.35=(x/155.0)100

x≈5.1925 g KCl

or you can rearrange it so that:

mass KCl = (percent as a decimal ) (total mass)

mass KCl = 0.0335 (155.0 g solution)

mass KCl = 5.1925 g