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Why soap is not suitable for washing clothes with hard water? |
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Answer» Soap reacts with calcium and magnesium ions in water to form insoluble precipitates, which is known as scum. Scum sticks to clothes and Interferes with cleaning ability of soap. RCOONa+ Ca2+ or Mg2 →(RCOO)2 Mg ↓or (RCOO)2 Ca ↓ |
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