Chemical Tests and Results

Test: Add dilute acid to solution Result: Solution fizzes and the gas produced turns limewater milky.

Test: Add dilute nitric acid, then silver nitrate solution. Result: White precipitate is formed

Test: Add dilute nitric acid, then silver nitrate solution. Result: Cream precipitate is formed

Test: Add dilute nitric acid, then silver nitrate solution. Result: Yellow precipitate is formed

Test: Heat with aluminium foil and NaOH Result: Gas turns damp red litmus paper blue

Test: Add dilute nitric acid then barium nitrate solution. Result: White precipitate is formed.

Test: Add dilute acid then bubble gas through potassium manganate (VII) solution Result: Gas turns potassium manganate (VII) solution from purple to colourless

Test 1: Add NH3 solution Result 1: White precipitate, which is insoluble in excess NH3 Test 2: Add NaOH solution Result 2: White precipitate, which redissolves in excess NaOH to form colourless solution.

Test: Heat with NaOH solution Result: Gas will turn damp red litmus paper blue

Test 1: Add NH3 solution Result 1: No reaction, or slight white precipitate in excess NH3 Test 2: Add NaOH solution Result 2: White precipitate, which is insoluble in excess NaOH

Test 1: Add NH3 solution Result 1: Grey-green precipitate which is insoluble in excess NH3 Test 2: Add NaOH solution Result 2: Green precipitate, which redissolves in excess NaOH to form a green solution

Test 1: Add NH3 solution Result 1: Light blue precipitate, which redissolves in excess NH3 to form a dark blue solution Test 2: Add NaOH solution Result 2: Light blue precipitate, which is insoluble in excess NaOH

Test 1: Add NH3 solution Result 1: Green precipitate, which is insoluble in excess NH3 Test 2: Add NaOH solution Result 2: Green precipitate which is insoluble in excess NaOH

Test 1: Add NH3 solution Result 1: Red-brown precipitate, which is insoluble in excess NH3 Test 2: Add NaOH solution Result 2: Red-brown precipitate, which is insoluble in excess NaOH

Test 1: Add NH3 solution Result 1: White precipitate, which redissolves in excess NH3 to form a colourless solution Test 2: Add NaOH solution Result 2: WHite precipitate which redisssolves in excess NaOH to form a colourless solution

Crimson red

yellow

lilac

orange-red

light green

blue-green

Turns damp red litmus paper blue

Turns limewater milky

Bleaches damp blue litmus paper