The furring of kettles and boilers are caused by
calcium hydroxide
calcium hydrogen trioxocarbonate (IV)
calcium trioxocarbonate (IV)
calcium tetraoxocarbonate
magnesium tetraoxocarbonate (VI)
Correct answer is C
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.