Answer / Krishan Kumar Goyal

The hardness of water can be determined using various methods such as the titration method, the German hardness test, and the EDTA (Ethylene Diamine Tetraacetic Acid) colorimetric method. The primary reason for determining water hardness is to understand its effects on household appliances, plumbing systems, soap usage, and laundry.nnHard water can lead to the buildup of scale in pipes, reducing their efficiency and lifespan. It can also make it more difficult to create a lather with soap, leading to wasted product.

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