ChemistryWaterWAEC
Boiling removes temporary hardness because calcium hydrogencarbonate
Show answer
Answer: C. decomposes to insoluble calcium carbonate
Ca(HCO₃)₂ → CaCO₃ + H₂O + CO₂, forming kettle fur.
An AdmitMe practice question, written for the WAEC syllabus. Not an official past question.