Kris Kelly
Cation-Anion Lab
CHEM 121L
11/26/07
Theory/Background:
In this lab, various processes and chemical reactions will take place in order to
determine whether or not cations or anions are present. This is more of a
qualitative analysis type experiment where calculations are absent and detailed
observations of the reaction process are written down. In order to determine
which types of cation or anion is present, two tests must be performed, a
preliminary test and a specific test. A preliminary test is a procedure used to
determine if cations or anions are present in the first place. If that test proves
positive, specific tests for different ions may be executed.
Key Data:
Reagent
Observations
Equations
1
Litmus paper turned blue
Solution turned brown
2
White precipitate
Yellow Solution
3a
Reddish brown precipitate
3b
Yellow liquid formed
3c
Blue precipitate formed
4
Brick red flame formed
5a
Strawberry red precipitate
formed
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Preliminary Concentrated H SO
Test
Ion
Observations
Equations
SO
No reaction
NO
No reaction
CO
Violent bubbling
Choking odor
Cloudy white precipitate
Clear gas
Cl
Test tube began smoking
(white gas)

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- Spring '08
- klein
- Chemistry, Reaction, Ion, white precipitate
-
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