Chemical Analysis Tests Flashcards
(20 cards)
Describe the test for hydrogen gas
Hold a lit splint in the gas - listen for squeeky pop
What is the test for oxygen gas?
Put a glowing splint into the gas - it will re-light
What is the test for carbon dioxide
Bubble through limewater. Colourless to Cloudy
What is the gas test for Chlorine?
Damp Blue Litmus Paper Bleaches White
Flame Tests: Lithium
Red/Crimson
Flame Tests: Sodium
Yellow/Orange
Flame Tests: Potassium
Lilac
Flame Tests: Calcium
Orange/Red
Flame Tests: Copper
Green Precipitate
Sodium Hydroxide Tests: Iron 2
Green Precipitate
Sodium Hydroxide Tests: Iron 3
Brown Precipitate
Sodium Hydroxide Tests: Aluminium, Calcium, Magnesium
White Precipitate
Halide Tests: Chlorine
Add silver Nitrate: White Precipitate
Halide Tests: Bromine
Add silver nitrate: Cream Precipitate
Halide Tests: Iodine
Add silver nitrate: Yellow Precipitate
Acid Test for Carbonates
Add Acid, Bubble gas produced through limewater - if carbonate colourless limewater turns cloudy.
Sodium Hydroxide Tests: Which ions are soluble in excess NaOH
Aluminium
Sodium Hydroxide Tests: Which ions are insoluble in excess NaOH
Calcium and Magneiusm
What is the test for Sulfate ions?
Add Barium Chloride and check for white precipitate
How can you identify the difference between Calcium and Magnesium following a NaOH test
Calcium produces an orange colour following a flame test.
