Chemistry, asked by aakashreddy385, 3 months ago

S2.What is the role of buffer in the estimation of hardness of water?

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Answered by dayesha2005

4

Answer:

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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