C8- chemical analaysis Flashcards
1
Q
What does a pure substance have?
A
Specific melting and boiling points
2
Q
What are formulations?
A
Mixture of certain quantities of substances designed to fulfil a specific purpose
3
Q
Examples of formulations
A
- Paints
- Fuels
- Alloys
- Fertilisers
4
Q
What is chromatography?
A
the separating of a mixture to identify its constituent substances
5
Q
Phases of chromatography
A
- Mobile phase
- Stationary phase
6
Q
What is the Rf value?
A
- Rf values can be compared against that of known substances to identify them
7
Q
Rf value equation
A
Distance substances moved/ distance mobile phase moved
8
Q
Hydrogen gas test
A
Lit splint produces squeaky pop
9
Q
Oxygen gas test
A
will relight glowing splint
10
Q
Carbon dioxide gas test
A
causes limewater to turn cloudy when bubbled through it
11
Q
Chlorine gas test
A
bleached blue litmus paper
