Question

which one of the following saltis not responsible for hardness of water?
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Answer 1

Answer:

Salts of Calcium and Magnesium are responsible for hardness of water. Bicarbonates, Carbonates, Chlorides and Sulphates of Calcium and Magnesium causes permanent hardness.

Answer 2

Salts of calcium and magnesium are responsible for the hardness of water.

• Hard water contains calcium and magnesium mainly bicarbonates, chlorides, and sulfates. Iron ore may be present; embedded in oxid to the ferric form, it appears as a reddish-brown color on washed fabrics and on representative surfaces.
• The water solubility caused by calcium bicarbonate is known to be temporary because boiling converts bicarbonate into insoluble carbonate; hardness from some salt is said to be permanent. Calcium and magnesium ions in solid water react with high-fat sold acids to form an insoluble gelatinous curd, thus causing deterioration of the soap. This undesirable reaction does not occur with modern cleaners.