QUALITATIVE ANALYSIS OF GROUP II CATIONS TO DO: Draw a schematic diagram showing the result in each step. COMPLETE THE TABLE BELOW 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.

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

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QUALITATIVE ANALYSIS OF GROUP II CATIONS

TO DO: Draw a schematic diagram showing the result in each step.

COMPLETE THE TABLE BELOW

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.

Analytical Chemistry (2021)
Table 1: Qualitative Analysis of Group II Cations
Confirmatory
Result/
Substance
Inference
Group II
Cations
Reagent
Observation
Formed

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