chemical tests Flashcards
test for ammonia
damps red litmus paper turns blue
carbon dioxide test
bubble through limewater, it turns milky/cloudy
chlorine test
Damp blue litmus paper it bleaches white
hydrogen test
hold a lighted splint in mouth of test tube, burns with a ‘squeaky pop’ sound
Oxygen
Hold a glowing splint, splint relights
test for lithium
burns red
sodium
burns yellow
potassium
burns lilac
calcium
burns Orange - red
Copper
Burns Blue - green
tet for ammonium
if its in hydroxide, ammonia gas produced damp red litmus blue
test for Copper (II)
hydroxide test, light blue precipitate formed.
Iron (II) test
hydroxide test, green precipitate formed.
test for Iron (III)
hydroxide test, Red-brown precipitate formed
test for carbonate
add dilute acid and test the gas realised, effervescence, gas produced is CO2 which turns limewater milky.
test for chloride
add dilute nitric acid and add silver nitrate, white precipitate formed
test for bromide
acidify with dilute nitric acid and add aqueous silver nitrate, cream precipitate formed.
test for Iodide
add dilute nitric acid and add aqueous silver nitrate, yellow precipitate formed.
test for sulfate
add dilute nitric acid and add aqueous barium nitrate, white precipitate formed.
chemical test for water
Anhydrous copper (II) sulfate turns form white to blue on the addition of water
equation for chemical test for water
CuSO4 (s) + 5H20 –> CuSO4.5HsO (s)
Hydrogen Mr
(2x1) = 2
water Mr
(2x1) + 16 + 18
potassium Carbonate Mr
138
