Pure substance
Single element or compounds
Formulation
Mixture that has been designed for a useful product
Examples of formulations
Fuels
Cleaning agents
Paints
What can chromatography be used for
Separate mixtures and give information
Two phases involves on chromatography
Stationary and mobile
What will happen is the substance is insoluble
Spot remains on the pencil line
What does the separation the substance depend on
The solubility in the mobile phase
What is the rf value
Ratio of the distance moved by the mixture and the distance moved by the solvent
What is the formula for rf
Distance moves by substance divided by distance moved by solvent
How can rf values identify compounds
Comparing them to known rf values
How many sports does a pure compound give
One
Key steps
Draw line with pencil
Place dots of ink
Paper into a beaker
Leave water to run
Mark solvent front
How is rf determined
Measure distance to spot
Measure distance to solvent front
Divide the two
Hydrogen test
Squeaky pop
Oxygen test
Splint relights
Carbon dioxide test
Limewater goes milky
Chlorine gas test
Litmus paper bleached
