Section 20: Chemical Analysis 2 Flashcards
1
Q
What does a substance’s Rf value depend on?
A
How soluble it is in the solvent
2
Q
In chromatography, why must the substances be placed on a pencil line?
A
Pencil will not dissolve in the solvent
3
Q
In chromatography why must the solvent height be lower than the pencil line
A
So that the substance does not into the solvent off the paper
4
Q
How can hydrogen be tested for?
A
Makes a squeaky pop when a splint is placed in it
5
Q
How can oxygen be tested for?
A
Relights a glowing splint
6
Q
How can carbon dioxide be tested for?
A
Buble through limewater, turns it milky (cloudy)
7
Q
How can chlorine be tested for?
A
Bleaches damp litmus paper white
