In this module, you will:
⚫ learn about temporary and permanent hardness of water.
• Temporary hardness of the water is due to the presence of calcium and
magnesium bicarbonates.
• It can be removed by:
■ Boiling
■ Clark's method
• Permanent hardness of water is due to the presence of calcium and
magnesium chlorides and sulphates.
• It can be removed by:
■Treatment with washing soda
■ Calgon's method
AASOKA presents a video that talks about the temporary and permanent hardness of water and various methods for the removal of the hardness of the water.
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