Question

Find out the amount of solvent in 40% copper sulphate solution, if mass of solute is 5 g.

Answer 1

Answer:

as we know concentration=

$\frac{solute}{solution} \times 100$

thus

$\frac{5}{x + 5} \times 100 = 40$

$\frac{5}{x + 5} = 0.4$

$\frac{5}{x} = 0.4 - \frac{1}{ - 5}$

$\frac{5}{x} = \frac{19}{5}$

$\frac{1}{x} = \frac{19}{25}$

$x = \frac{25}{19} g$