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Why do soaps not work effectively in hard water?

Options

  1. ABecause hard water contains calcium and magnesium ions
  2. BBecause hard water is too cold for soap to dissolve
  3. CBecause hard water contains excessive sodium ions
  4. DBecause hard water contains chlorine ions

Correct answer

A. Because hard water contains calcium and magnesium ions

Step-by-step solution

Soaps do not work effectively in hard water because hard water contains calcium and magnesium ions, which form insoluble calcium and magnesium soaps when sodium or potassium soaps are dissolved in it.

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