Question

Question: Under what conditions can we make the thermal deco... Under what conditions can we make the thermal decomposition of calcium carbonate go at completion?

Answer 1

1.Thermal decomposition occurs at around 800-100oC.

2.There must be heating involved and steps to ensure that it decomposes completely.

3.On further heating it does not cause the substance to produce CO2 then it is said to be completely decomposed. For this purpose we can use limewater testFor calcium carbonate it is strongly heated until it undergoes thermal decomposition to form calcium oxide and carbon dioxide. The calcium oxide (unslaked lime) is dissolved in water to form calcium hydroxide (limewater). Bubbling carbon dioxide through this forms a milky suspension of calcium carbonate.