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Water — CHEMISTRY STD 9 — Question

ICSE BoardEnglish MediumSTD 9CHEMISTRYWater2 Marks
Question
State the disadvantages of using hard water.
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Answer

  • It is more difficult to form lather with soap.
  • Scum may form in a reaction with soap, wasting the soap.
  • Carbonates of calcium and magnesium form inside kettles. This wastes energy whenever you boil a kettle.
  • Hot water pipes 'fur up'. Carbonates of calcium and magnesium start to coat the inside of pipes which can eventually get blocked.

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