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raidgesseyJessidro raidgesseyJessidro
  • 21-01-2017
  • Chemistry
Answered

P.ermanent hardness of water can be removed by what?(

a.adding slaked lime.(

b.boiling.(

c.adding caustic soda.(

d.filtration

Verified Answer :

jennetkara
jennetkara jennetkara
  • 21-01-2017

Temporary
hardness is caused by a combination of calcium ions and bicarbonate
ions in the water. It can be removed by boiling. Boiling promotes the formation of carbonate
from the bicarbonate and precipitates calcium carbonate out of solution,
leaving water that is softer upon cooling.

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