Chromatography, Distillation, And Mixtures (paper1) Flashcards
What equipment is used in chromatography
Beaker, rod, paper, pencil, solvent
How do you calculate the rf value
Distance moved by the spot divided by distance moved by solvent
What is the rf value less than
1
What’s potable water
Clean, no added things water
What is used in distillation
Thermometer, distillation column, flask, Bunsen burner, condenser and receiver
Can the composition of a pure substance be changed
No
What can be pure
Compounds and elements
What is melting point an example of
Physical property
What’s a filtrate
The bits of soluble solute and solution that have passed through the filter paper
What is a residue
Bits of insoluble solution that can’t pass through the filter paper
What do we do to a filtrate to make crystals
Heat it gently with a Bunsen burner
What does a risk assessment identify
Hazards and risks during an experiment
What is melting point an example of
Physical property
What happens if crystals are formed slowly
The particles have a longer time to make an ordinary pattern therefore making larger crystals
How is table salt produced
By evaporating sea water or extracting it from the ground using solution mining
What is solution mining
Where water is pumped into layers of salt underground. This solution is then evaporated.
What is saturated solution
The maximum amount of solute that can dissolve in a solvent at that temp.
What’s a filtrate
The bits of soluble solute and solution that have passed through the filter paper
What is a residue
Bits of insoluble solution that can’t pass through the filter paper
What do we do to a filtrate to make crystals
Heat it gently with a Bunsen burner
What does a risk assessment identify
Hazards and risks during an experiment
What is producing pure water from sea water called
Desalination
What does chemical analysis involve
Using chemical reactions to identify substances in a sample
What can tap water form in reactions
Unexpected cloudy precipitates
