Categories: Chemistry NECO

The furring of kettles and boilers are caused by?

A. calcium hydroxide
B. calcium hydrogen trioxocarbonate (IV)
C. calcium trioxocarbonate (IV)
D. calcium tetraoxocarbonate
E. magnesium tetraoxocarbonate (VI)

Correct Answer:

Option C – calcium hydrogen trioxocarbonate (IV)

Explanation

The furring of kettles or boilers – this is as a result of the decomposition of Ca(HCO3)2 into CaCO3, and this coats the inside of a kettle or boiler used in heating water containing dissolved Ca(HCO3)2.

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