Question

11 g oxalic acid is used to prepare 500 mL solution. The density of this solution is 1.1 g mL^–1 . Calculate the mass percentage of oxalic acid in solution.

Answer 1

Mass of oxalic acid = 11 g

Mass of solution = Volume × Density

= 500 × 1.1

= 550 g

\(\therefore\) Mass % of oxalic acid =  \(\frac{Mass\,of\,oxalic\,acid}{Mass\,of\,solution}\) x 100

= \(\frac{11}{550}\) x 100 = 2%