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Do all carbonates decompose when heated?

Heating the carbonates

Most carbonates tend to decompose on heating to give the metal oxide and carbon dioxde. For example, a typical Group 2 carbonate like calcium carbonate decomposes like this: In Group 1, lithium carbonate behaves in the same way – producing lithium oxide and carbon dioxide.

Hereof, which carbonates do not decompose on heating?

A carbonate, which does not decomposes on heating: Sodium Carbonate and Potassium Carbonate. A nitrate, which produces oxygen as the only gas: Sodium Nitrate and Potassium Nitrate.

One may also ask, why does potassium carbonate not decompose when heated? The product of its decomposition would be carbon dioxide and a form of potassium oxide (K2O, K2O3 and others), the most stable of the potassium oxide forms seems to be K2O3, it is the only one that doesn’t appear to decompose when heated. In air with moisture potassium will tend to become an oxide or hydroxide.

Keeping this in view, what happens to carbonates when heated?

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Stability of metal carbonates. One common reaction of any metal carbonates is known as thermal decomposition. When metal carbonates are heated, they break down to form the metal oxide and carbon dioxide gas. This means that sodium carbonate is very stable and requires a high temperature to decompose.

Does MgCO3 decompose on heating?

When magnesium carbonate, MgCO3, is heated to a high temperature, it decomposes. A 20.29-gram sample of impure magnesium carbonate is completely decomposed at 1000.

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