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5.8 (Formulations (A mixture that has been put together as a useful…
5.8
Formulations
A mixture that has been put together as a useful product
Foods
Fuel
Paints
Medicines
Fertilisers
Test for Carbon Dioxide
Insert Lit splint = Flame goes out if present
Bubble CO2 through lime water - water turns cloudy if present
Test for Oxygen
Insert GLOWING splint = Relights glowing splint if present
Test for Hydrogen
Insert lit splint = Squeaky pop if present
Rf = Retention Factor
Rf = Distance moved by substance DIVIDED BY distance moved by solvent
Test for chlorine
Use litmus paper, when damp its put into chlorine which turns bleached and is white
PURE = A single element/compound not mixed with anything
Water boils at 100. Salt is added and the boiling point goes up
Water freezes at 0. Salt is added and the freezing point goes down
Pure substance adding salt = higher boiling point and lower freezing point
Larger Rf value = solvent more soluble
Chromatography
A pure substance only produces one spot