C3.4 Flashcards
What can a range of chemical tests be used for
The detection and identification of elements and compounds
What can titration be used for
To find the amounts of acid or alkali in a solution
What can flame tests be used for
To identify metal ions.
What 5 compounds produce distinctive colours in flame tests
Lithium Sodium Potassium Calcium Barium
What colour flame does lithium compounds result in
Crimson flame
What colour flame does sodium compounds result in
Yellow flame
What colour flame does potassium compounds result in
Lilac flame
What colour flame does calcium compounds result in
Red flame
What colour flame does barium compounds result in
Green flame
What 3 ions form white precipitates with sodium hydroxide solution
Aluminium
Calcium
Magnesium
What does aluminium hydroxide precipitates only do
Dissolve in excess sodium hydroxide solution
What 3 ions form coloured precipitates with sodium hydroxide solution
Copper(ll)
Iron(ll)
Iron(lll)
What colour precipitates does copper form with sodium hydroxide solution
Blue precipitates
What colour precipitates does iron (ll) form with sodium hydroxide solution
Green precipitates
What colour precipitates does iron (lll) form with sodium hydroxide solution
Brown precipitates
What do carbonates react with to form carbon dioxide
Dilute acids
What colour precipitate does carbon dioxide produce with limewater
White
What does carbon dioxide do to limewater
Make it cloudy
What do halide ions in solution produce with silver nitrate solution in the presence of dilute nitric acid
Precipitates
What colour is the precipitate that chlorine ions produce with silver nitrate solution
Silver chloride is White
What colour is the precipitate that bromine ions produce with silver nitrate solution
Silver bromide is cream
What colour is the precipitate that iodine ions produce with silver nitrate solution
Silver iodide is yellow
In the presence of dilute hydrochloric acid what do sulphate ions in solutions produce with barium chloride
White precipitates
How can the volumes of acid and alkali solutions that react with each other be measured
By titration using a suitable indicator
What can titration be used for if the concentration of one of the reactants is known
To find the concentration of the other reactant
