. lepae uomplete tlow chart for the procedure and put it on your data sheet. 2.
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Question
. lepae uomplete tlow chart for the procedure and put it on your data sheet. 2. Write balanced net ionic equations describing each of the following reactions: Precipitation of tin (IV) sulide with H2 The confirming test for tin The confirming test for copper 2. A solution that may contain Cu?*, Bi, Sn", or Sb2* is treated with thioacetamide in an acidic medium. The black precipitate which forms is partly soluble in strongly basic solution. The precipitate which remains is solu of NH, OH. The basic solution, when acidified, pro are present? Which are absent? Which are in ble in 6 MHNO, and gives only a white precipitate upon the addition duces an orange precipitate.. Which group IIions doubt? How would you remove all doubt?Explanation / Answer
2. Confirmatory test for Sn+4:
Tin reacts with H2S and yellow SnS2 precipitates. The net ionic equation is:
Sn+4 (aq) + 2H2S = SnS2 (s) + 4 H+ (aq)
Confirmatory test for copper:
Net ionic equation is : Cu+2 (aq) + Fe (CN)6-2 (aq) = Cu[Fe (CN)6]2 (s)
2.
The solution does not contain Sn+4 because its sulphide is not black.
It may contain Cu+2 or Bi+3 or Sb+3 because all their sulphides are black.
When the solution is made alkaline it produces white precipitate which is a hydroxide.
So; the solution contains either Bi+3 or Sb+3 because their hydroxides are white.
When the alkaline solution will be made acidic an orange precipitate appears.So the solution contains Sb+3
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