Question

write the chemical eqation of reaction in which the following changes have taken place with anwith an example of each :- (a) change in colour​

Answer 1

Answer:

Answer. in this reaction when iron reacts with copper sulphate, copper sulphate is blue in colour change into green in colour called iron sulphate as a result of displacement reaction. in this reaction when calcium oxide reacts with water to increase the temperature and forms a Calcium Hydroxide

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Answer 2

CHEMICAL REACTIONS

❇ CHANGE IN COLOUR

Fe + CuSO4 (aq) ——> FeSO4 + Cu

When a few pieces of iron are dropped into a blue coloured copper sulphate solution, the blue colour of the solution fades and eventually turns into light green due to the formation of ferrous sulphate.

Cu (s) + H2SO4 (aq) ——> CuSO4 (aq) + 2H2O (l) + SO2 (g)

When concentrated sulphuric acid is added to a piece of copper, a blue solution of copper sulphate is formed.

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