Question

A standard solution was prepared by dissolving 2g of CaCO3 in a litre of water.10ml of this solution required 27.6 ml EDTA solution. The same EDTA was titrated with a sample of water taken 10ml and it required 12.3ml EDTA. Calculate total, temporary and permanent hardness of sample water if same volume of boiled water consumed 4.3ml EDTA.

Answer 1

Explanation:

A standard solution was prepared by dissolving 2g of CaCO3 in a litre of water.10ml of this solution required 27.6 ml EDTA solution. The same EDTA was titrated with a sample of water taken 10ml and it required 12.3ml EDTA. Calculate total, temporary and permanent hardness of sample water if same volume of boiled water consumed 4.3ml EDTA.