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Which of the following methods of determining total hardness of water uses a solution of di-ethylene diamine tetra acetic acid?

Which of the following methods of determining total hardness of water uses a solution of di-ethylene diamine tetra acetic acid? Correct Answer Versenate method

Concepts:

Hardness in water is due to presence of multivalent metallic cations.

Versenate method is used to determine the total hardness of fresh water. The method uses a molecule called EDTA (ethylene diamine tetra acetic acid) which forms a complex with calcium and magnesium ions. EDTA is short for. A blue dye called Eriochrome Black T (EBT) is used as the indicator.

Clarks’s Method is the water softening process. It removes the hardness of water by converting bicarbonates into carbonate.

The Hoyer system is generally used for the production on large scale of pre-tensioned structural element of the structure.

Hehner’s method is used to determine the temporary hardness of water. It is determined by finding the alkalinity of water before boiling and that left after boiling. 

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