Anachem Experiment 2 Flashcards
What are the 7 group 3 cations
iron
cobalt
nickel
aluminum
manganese
zinc
chromium
group 3 cations are precipitated in a solution containing…
Ammonia, ammonium chloride, ammonium sulfide
Precipitate is a mixture of
sulfides and hydroxides
Soluble group 3 cations
Chromium
Zinc
Aluminum hydroxides
Insoluble group 3 cations
Manganese
Iron
Nickel
Cobalt
ammonia
NH4OH
ammonium chloride
NH4Cl
ammonium sulfide
(NH4)2S
Makes the solution basic
3F KOH (Potassium Hydroxide)
If all precipitate dissolved, it indicates..
Absence of Ni and Co (Nickel and Cobalt)
Color of ALUMINUM ION precipitate
RED
Red precipitate
ALUMINUM or NICKEL
Color of CHROMIUM ION
Blue color w/c fades rapidly
Blue color w/c fades rapidly
CHROMIUM ION
Color of ZINC ION
White precipitate
White precipitate
ZINC ION
Color of MANGANESE ION
Reddish- Purple
Reddish- purple
MANGANESE ION
Color of FERRIC ION
Deep red
Deep red
Color of FERRIC ION
color of COBALT ION
Blue-green
Blue green
Color of COBALT ION
Color of NICKEL ION
Red precipate