Write your observation. when hard water is added to a beaker containing soap solution.
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A white cloudy precipitate can be observed which is a micelle i.e impurities or dirt present in the hard water trapped between the molecules of soap.
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Answer:
Precipitation occurs when hard water is added to beaker containing soap water. Thus formed precipitate is called scum.
Explanation:
When Hard water is added to beaker containing soap water then the calcium and magnesium ions present in hard water react with sodium salts present in soap.
With this reaction a precipitate is formed and it is called scum.
This scum is insoluble and sticks to beaker walls.
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