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InterviewSolution
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In the laboratory of a school, the sample of hard water is not available "to study thecomparative cleaning capacity of a sample of soap in soft and hard water". Which saltfrom the laboratory can be added to tap water to make it hard ? In the experimenthow is cleaning capacity of soap compared? |
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Answer» Salt: Sulphate, Chloride or hydrogen Carbonate of Calcium or Magnesium (any one) By adding equal amount of soap to water taken in two test tubes, shakingvigorously and comparing the length of lather or foam formed in each testtube. Like if you find it useful |
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