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i. Add a small sprinkle of NaBiO3.
ii. Stir. If a reaction is observed, then the Mn2+ cation has been
d. To the remaining solution in the tube,
i. Add equal volumes of 0.2 g KNO2(s) and 4 M KC2H3O2(aq)
ii. Seal the tube with parafilm and shake vigorously. If a reaction is
observed, then the Co2+ cation has been confirmed. If NO reaction
was observed, don’t panic! You will be prompted to try another
test for Co2+ later.
Confirmation Tests for the Fe3+ Ion (and Alternative Test for Co2+)
4. To the tube containing the liquid from Step 2
a. Add 6M NaOH until a ppt is visible.
b. Then add 1 drop of 6 M HNO3 until the ppt disappears again. It may be
necessary to add more than 1 drop. Your solution is now neutralized.
c. Place a small amount of this solution in 2 wells of a spot plate.
i. To the first well, add 2 drops of KSCN. If a reaction is observed,
then the Fe3+ cation has been confirmed.
d. If the confirmation test for Co2+ in Step 3d for did not show a reactio...
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This note was uploaded on 04/09/2013 for the course CHE CHE 2C taught by Professor Nasiri during the Spring '07 term at UC Davis.
- Spring '07