Chemical test Flashcards
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1
Q
Hydrogen sulfide H2S
A
- Smell cautiously.
- Test with moist lead acetate paper.
results - Rotten egg odor.
- Turns brown-black (PbS)
2
Q
Ammonia NH3
A
- Smell cautiously
result - Sharp odor
3
Q
Hydrogen chloride HCl
A
- Smell cautiously
- Exhale over the gas
result - Choking odor
- Vapor fumes form
4
Q
Acetate C2H3O2-
A
Add concentrated H 2SO4 and warm gently
result
Odor of vinegar released.
5
Q
Ferrous Fe 2+
A
Add solution of potassium ferricyanide,
result
Dark blue precipitate forms (Turnball’s blue).
6
Q
Ferric Fe 3+
A
Add solution of potassium ferrocyanide.
result
Dark blue precipitate forms (Prussian blue).
7
Q
Hydrogen sulfide test
Black color
A
Au, Hg, Ag, Ni, Fe
8
Q
Hydrogen sulfide test
brown black
A
Pb
9
Q
Hydrogen sulfide test
Brown
A
Bismuth (Bi)
10
Q
Hydrogen sulfide test
white
A
Zinc (Zn)
11
Q
Hydrogen sulfide test
yellow
A
cadmium (Cd)
12
Q
Hydrogen sulfide test
Light yellow
A
Arsenic (As)
13
Q
Hydrogen sulfide test
orange
A
Antimony (Sb)
14
Q
Hydrogen test
A
1 allow to mix with air and then ignite 2 burn it and trap the product Observations 1 the gas explodes 2 produces water that turns Cobalt paper from blue to pink
