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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.
a) Name the iron salt.
b) Name the type of reaction that takes place during the heating of iron salt.
c) Write a chemical equation for the reaction involved.


Solution

a) The iron salt is ferrous sulphate $$(FeSO_4).$$

b) The type of reaction that takes place during the heating of iron salt is decomposition reaction.

c) The balanced chemical equation for the reaction involved is:

$$2FeSO_4(s)\xrightarrow[Decomposition]{Heat}Fe_2O_3(s)+SO_2(g)+SO_3(g)$$

Chemistry

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