Chemical Tests for Anions-Cations and some others

i have put together some compounds, their tests and results which need to be known for AQA Physics unit 3

these include:

-Flame tests

-Sodium Hydroxide tests

-Organic compound tests

i just had my exams but hope this still helps you.

if it helps, remember them then get someone to ask you what the results are when you have a free minute. thats how i remembered all of mine.

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  • Created by: Dhruv
  • Created on: 08-06-10 19:39
Preview of Chemical Tests for Anions-Cations and some others

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TESTS FOR CATIONS
COMPOUND TEST RESULT
Sodium (Na) Flame Yellow
Potassium (K) Flame Lilac
Calcium (Ca) Flame Red-brick
Copper (Cu) Flame Blue
Lithium (Li) Flame Red-crimson
TESTS FOR ANIONS
Carbon dioxide Bubble through Milky precipitate
limewater
Copper carbonate Heat strongly Black when cool
Zinc carbonate Heat strongly Yellow when cool
SULPHATE IONS Add HCL then BaCl White precipitate
Chloride Add dilute HNO3 White precipitate
then AgNO3
Bromide Add dilute HNO3 Creamy
then AgNO3 precipitate
Iodide Add dilute HNO3 Yellow precipitate
then AgNO3
Nitrates Add Aluminum Ammonia-(smell
Powder, Add or use damp
NaOH litmus paper)
TESTS FOR SODIUM HYDROXIDE
Calcium, Ca2+ ...+2OH-(...OH)2 White precipitate
Copper, Cu2+ ...+2OH-(...OH)2 Blue

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Iron, Fe2+ ...+2OH-(...OH)2 Sludgy green
Iron, Fe3+ ...+2OH-(...OH)2 Reddish brown
Aluminum,Al3+ ...+2OH-(...OH)2 White then dissolves
Magnesium,Mg2+ ...+2OH-(...…read more

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