Chemical Analysis Flashcards
Define Purity
A substance with nothing added to it
Define Formulation
Useful mixtures with a precise purpose that are made using a formula
Chromatography Required Practical
1) The result of chromatography analysis is called a chromatogram
2) An Rf value is the ratio between the distance travelled by the dissolved substance (the solute) and the distance travelled by the solvent. The further through the stationary phase a substance moves, the larger the Rf value. You can calculate the Rf value using the formula: distance travelled by substance B / distance travelled by solvent A
Chlorine Gas Test
Chlorine turns blue litmus paper red and then bleaches it white
Oxygen Gas Test
Relights a glowing splint
Carbon Dioxide Gas Test
Bubbling through limewater turns it cloudy
Hydrogen Gas Test
Lit splint causes a squeaky pop
Carbonate Ion Test
Add a few drops of dilute acid and connect to a test tube of limewater.
If Carbonate Ions are present, Carbon Dioxide will be produced and bubbled through the limewater, turning it cloudy
Sulfate ion Test
Add dilute hydrochloric acid and barium chloride solution.
White precipitate will form
Halide Ion Tests
Add dilute nitric acid and silver nitrate solution
Chloride ion gives white precipitate
Bromide ion gives cream precipitate
Iodide ion gives yellow precipitate
Lithium Flame Test
Crimson Flame
Sodium Flame Test
Yellow Flame
Potassium Flame Test
Lilac Flame
Calcium Flame Test
Orange-red Flame
Copper Flame Test
Green Flame
Sodium Hydroxide Ion Tests
Calcium - White Precipitate
Copper(II) - Blue Precipitate
Iron(II) - Green Precipitate
Iron(III) - Brown Precipitate
Aluminium - White Precipitate - Dissolves in excess
Magnesium - White Precipitate
