Please enable JavaScript.
Coggle requires JavaScript to display documents.
Chemical tests (Flame (Cation) Tests (Procedure (4) Observe colour of…
Chemical tests
Flame (Cation) Tests
-
Why do different metal cations give different colours in a flame test?
The color of the light depends on the energies of the photons emitted, which are in turn are determined by the energies required to move electrons from one orbital to another.
-
-
-
-
-
-
Gas Tests
O2, Vital for living beings, flammable
-
CO2 , Poisonous, non-flammable
-
-
H2, Great source of fuel, explosive
-
NH3, Used to make fertilizers, smelly and poisonous
-
Cl2, many industrial uses, poisonous
Damp universal indicator / litmus paper will turn red and then bleaches. It has a dangerous but distinct smell.
-
Anion Tests
Carbonate Ion tests
1) Add hydrochloric acid to the solution, CO2 will be produced
-
Halide tests
-
1) Add acidified silver nitrate (the acid reacts with any other ions which could also give a precipitate)
-
Cl- > white, Br- > cream, I- > yellow
-
-
-