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Question
When a green iron salt is heated strongly, its colour finally changes to brown and odour of burning sulphur is given out.
- Name the iron salt.
- Name the type of reaction that takes place during the heating of iron salt.
- Write a chemical equation for the reaction involved.
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Solution
- Ferrous sulphate (Iron(II) sulphate)
- Thermal decomposition reaction
- \[\ce{2FeSO4_{(s)} ->[Heat] Fe2O3_{(s)} + SO2_{(g)} + SO3_{(g)}}\]
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