A sample of sodium carbonate contains impurity of sodium sulphate. 1.25 g of this sample are dissolved in water and volume made up to 250 mL. 25 mL of this solution neutralise 20 mL of N/10sulphuric acid. Calculate the percentage of sodium carbonate in the sample.

A sample of sodium carbonate contains impurity of sodium sulphate. 1.2

1.	A sample of sodium carbonate contains impurity of sodium sulphate. 1.25 g of this sample are dissolved in water and volume made up to 250 mL. 25 mL of this solution neutralise 20 mL of N/10sulphuric acid. Calculate the percentage of sodium carbonate in the sample.
Answer» ANSWER :84.9