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Question

2g of ferrous sulphate crystals are heated in a dry boiling tube.
(i) List any two observations.
(ii) Name the type of chemical reaction taking place.
(iii) Write the chemical equation for the reaction.

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Solution

(i) As ferrous sulphate crystals are heated, the following two observations occur:

(a) Green colour of FeSO4 disappears which means a change in state and colour occurs.

(b) The reddish brown solid is formed and gas is generated during this process.
(ii) It is a decomposition reaction since the compound (ferrous sulphate) decomposes into two or more substances.


(iii) The following is the chemical reaction equation.

2FeSO4(s)+Heat(Δ)⟶Fe2O3(s)+SO2(g)+SO3(g)


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