level: carbonates
Questions and Answers List
level questions: carbonates
| Question | Answer |
|---|---|
| what temp does calcium carbonate (limestone) thermally decompose at, and the symbol equation | 840°C to become calcium oxide (lime). CaCO3(s) + heat → CaO(s) + CO2(g) |
| what type of reaction is this | reversible, so the carbon dioxide needs to be removed otherwise it will react with the calcium oxide to make calcium carbonate again. |
| what is lime used for | manage the acidity of soil and industrial waste to neutralise it. For example sulphur dioxide produced by factories can be neutralised with lime so that it doesn’t cause acid rain. |