MAKE A FLOWCHART/SCHEMATIC DIAGRAM Procedure: Place 20 drops of each of 0.2M CuSO4 in a centrifuge tube. Then add 5 drops of freshly prepared 6M (NH4)2S to each centrifuge tube. Record your observation. Centrifuge the mixtures for 3 mins.  and decant the supernatant liquid. Add 10 drops of DI water and 10 drops of 6M HNO3. Stir and boil the mixture in a hot water bath for 5 mins.  centrifuge the mixture for 3 mins. Decant the supernatant solution from procedure 3. Discard the To each of the supernatant liquid, add 6 drops of 6M H2SO4. Allow themixtures to cool and 5 drops of DI water. To the mixtures in procedure 4, add few drops of concentrated NH3 until the solution becomes basic. Confirm using a litmus paper. Record your observation. Add 1 drop of 5M NaOH and 1 drop of 0.1 M SnCl2 to the centrifuge tube containing Bi3+ ion , centrifuge and decant the supernatant liquid. To the solution containing Sn 2+ion , add 6M HCl , dropwise in the test tube. Stir well. Add excess HCl in the solution. Centrifuge the mixture and record observation. To the solutions containing Sb+3, add few drops of H2s and few drops of ammonium polyphosphate in the solution. Record your observation.

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Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
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Chapter1: Chemical Foundations
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MAKE A FLOWCHART/SCHEMATIC DIAGRAM

Procedure:

  1. Place 20 drops of each of 0.2M CuSO4 in a centrifuge tube. Then add 5 drops of freshly prepared 6M (NH4)2S to each centrifuge tube. Record your observation.
  2. Centrifuge the mixtures for 3 mins.  and decant the supernatant liquid. Add 10 drops of DI water and 10 drops of 6M HNO3. Stir and boil the mixture in a hot water bath for 5 mins. 
  3. centrifuge the mixture for 3 mins.
  4. Decant the supernatant solution from procedure 3. Discard the To each of the supernatant liquid, add 6 drops of 6M H2SO4. Allow themixtures to cool and 5 drops of DI water.
  5. To the mixtures in procedure 4, add few drops of concentrated NH3 until the solution becomes basic. Confirm using a litmus paper. Record your observation.
  6. Add 1 drop of 5M NaOH and 1 drop of 0.1 M SnCl2 to the centrifuge tube containing Bi3+ ion , centrifuge and decant the supernatant liquid.
  7. To the solution containing Sn 2+ion , add 6M HCl , dropwise in the test tube. Stir well. Add excess HCl in the solution.
  8. Centrifuge the mixture and record observation.
  9. To the solutions containing Sb+3, add few drops of H2s and few drops of ammonium polyphosphate in the solution. Record your observation. 

 

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