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.