Question

if 2 moles of solute is dissolved in 200g water . Find %w/w​

Answer 1

Let the molar mass of solute be x grams

So 2moles have=2xgrams

W/w concentration=

$\dfrac{mass \: of \: solute}{mass \: of \: solvent} \times 100\% \\ \\ \\ = \frac{x}{200} \times 100 \\ \\ \\ = \frac{x}{2} \%$