is it possible to test hardness of water using soap? Give scientific reason for your answer
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Fill the bottle one-third full, add a few drops of pure liquid soap and shake vigorously for a few seconds. If there is a distinct lack of fluffy bubbles and the water appears cloudy and/or milky, your water is hard.
Soaps get precipitated as insoluble calcium and magnesium soaps in hard water as a scum but detergents do not.
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