Question

What salt of calsium and magnessium cause temprrory hardness of boiler feed water?

Answer 1

Answer:

hydrogencarbonates

This removes the calcium ions or magnesium ions from the water, and so removes the hardness. Therefore, hardness due to hydrogencarbonates is said to be temporary. Generally an increase in water temperature causes an increase in the solubility of most salts.

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