In which method of determining total hardness of water is based on the premise t

Question

In which method of determining total hardness of water is based on the premise that hardness producing substance react with soap and form insoluble compounds before lather is produced?

Options:

A . Clark’s method

B . Hehner’s method

C . Versenate method

D . EDTA method

Answer: Option A
Answer: (a).Clark’s method

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