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Experiment #6

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by

Celine Cruz

on 24 January 2015

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Transcript of Experiment #6

Whose hydroxides are soluble in excess NaOH & Na2O2
Iron Subgroup
Whose hydroxides are insoluble in NaOH and Na2O2
Aluminum Subgroup
6.2
5 drops each of test solution (6.1) +2 drops of 6N NH4OH +2drops of 6N NH4Cl.
6.1
In separate test tubes, 5 drops each of the ff:
6.1
Mn2+ + NH4OH
6.1
Al3+ + NH4OH

2 Subgroups of
Ammonium Sulfide Group
Procedure:
RESULTS
Experiment #6
Reaction of Ammonium Sulfide Group
Al3+ + 1 drop NH4OH until ppt formed
Mn2+ + 1 drop NH4OH until ppt formed
Co2+ + 1 drop NH4OH until ppt formed
Fe3+ + 1 drop NH4OH until ppt formed
Test the solubility of the ppt
by adding 2-3 drops of
NH4OH.
Color: WHITE
RESULTS
Presented by:
GROUP 3
Celine Bianca A. Cruz

Bea Jamaica L. Datu

Justine Keith A. Dayao

John Rick P. Del Rosario

Margaret Delle Ednaco

Kaori Flores
CHM 4
Ms. Sheila Mai Rocabo
Note the ppt. produced
in each test solution.
Color of ppt: WHITE
6.1
Co2+ + NH4OH
Color of ppt: BLUE
PPT didn't dissolve in 2-3
drops of NH4OH
6.1
Fe3+ + NH4OH
Color of ppt: BROWN
6.2
Al3+ Solution + 6N NH4OH
+ 6N NH4Cl
NO REACTION
6.2
Mn2+ Solution + 6N NH4OH
+ 6N NH4Cl
NO REACTION
6.2
Co2+ Solution + 6N NH4OH
+ 6N NH4Cl
Color of ppt: BLUE
Supernatant: WHITE
6.2
Fe3+ Solution + 6N NH4OH
+ 6N NH4Cl
Color of ppt: BROWN
Full transcript