ICSE Class 10 Answered
State what will you observe when:(i) Sulphur dioxide is passed through hydrogen sulphide solution. (ii) Ammonium hydroxide is slowly added to copper sulphate solution first a little and then in excess. (iii) Sodium hydroxide is slowly added to Iron (III) chloride solution. (iv) Sodium hydroxide is added to Zinc sulphate solution.(v) barium chloride solution is mixed with Sodium sulphate solution.
Asked by Topperlearning User | 04 Jun, 2014, 01:23: PM
Expert Answer
(i) Yellow coloured particles are seen suspended in the clear solution and these particles do not settle down, i.e., the solution of colloidal Sulphur is formed.
(ii) On adding Ammonium hydroxide drop by drop to a solution of Copper sulphate , a bluish white precipitate is formed which dissolves in excess of Ammonium hydroxide to give deep blue solution.
(iii) A reddish brown precipitate is formed.
(iv) A white precipitate is formed which is soluble in excess of NaOH.
(v) An insoluble white precipitate of barium sulphate and solution of sodium chloride is obtained and barium sulphate is insoluble in all the mineral acids.
(ii) On adding Ammonium hydroxide drop by drop to a solution of Copper sulphate , a bluish white precipitate is formed which dissolves in excess of Ammonium hydroxide to give deep blue solution.
(iii) A reddish brown precipitate is formed.
(iv) A white precipitate is formed which is soluble in excess of NaOH.
(v) An insoluble white precipitate of barium sulphate and solution of sodium chloride is obtained and barium sulphate is insoluble in all the mineral acids.
Answered by | 04 Jun, 2014, 03:23: PM
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