Question

If 10 g oxalic acid is dissolved in 500 n solution (density = 1.1g mL^-1) then calculate the percentage mass of oxalic acid.

Answer 1

Solution: Weight of solute 'WR' = 10 g 

Density of solvent 'd' = 1.1 g/mL 

Mass of solution = Volume x Density 

= 500 × 1.1 

= 550 g 

Mass percentage 

\(\frac{\text{Mass} \ \text{of} \ \text{solute}}{\text{Mass}\ \text{of} \ \text{solution} }\times 100\)

\(\frac{10}{550}\times 100\)

 1.82%