2 The sample of etazol CroH2N0S 03000 g was dissolved in hyd

2. The sample of etazol CroH2N0,S 0.3000 g was dissolved in hydrochloric acid and titrated with standard solution of sodium nitrite with titer by etazol 0.02844 giml. Calculate the mass fraction of etazol in the sample.

Solution

Mass fraction of etazol in the sample=actual mass of etazol/mass of sample

concentration of etazol determined by titration=0.02844 g/ml

Mass fraction of etazol in the sample=(0.02844 g/ml/0.3g)=0.0948 (per ml)