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Crystals of Salts

what is the c...

Question

what is the colour of aqueous solutions of
copper sulphate
ferrous sulphate
sodium sulphate
barium chloride

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Solution

copper sulphate blue (pentahydrate); anhydrous form is white in colour
ferrous sulphate green
sodium sulphate white
barium chloride yellow-green

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Q. The colour of the precipitate formed by mixing the aqueous solutions of sodium sulphate and barium chloride is:

what is the theory behind the precipitaion reaction between aqueous solution of barium chloride and aqueous solution of sodium sulphate?

Q. You are given the following materials:
(i) Iron nails
(ii) Copper sulphate solution
(iii) Barium chloride solution
(iv) Copper powder
(v) Ferrous sulphate crystals
(vi) Quicklime

Identify the type of chemical reaction taking place when:
(a) Barium chloride solution is mixed with copper sulphate solution and a white precipitate is observed.
(b) On heating copper powder in air in a china dish, the surface of copper powder turns black.
(c) On heating green coloured ferrous sulphate crystals, reddish brown solid is left and smell of a gas having odour of burning sulphur is experienced.
(d) Iron nails when left dipped in blue colour copper sulphate solution become brownish in colour and the blue colour of copper sulphate fades away.
(e) Quick lime reacts vigorously with water releasing a large amount of heat.
Write chemical equations for each one of the above reactions.

What happens when barium chloride solution is added to sodium sulphate solution?

Q. What will be the colour of the precipitate formed when ferrous sulphate is added to an aqueous solution of sodium hydroxide?

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