Question

Buffer is added during the determination of hardness of water using edta

Answer 1

Answer:

so what do u want to ask exactly??

Answer 2

A few drops of an indicator are added to a water sample. ... In order for this analysis to work well, the water sample must be kept at a basic pH. Since both EDTA and the indicator are themselves weak acids, a buffer solution , which is able to maintain a fairly constant pH even when acids and bases are added, is used.

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