Testing For Ions Flashcards
1
Q
Method for testing for CARBONATE ions
A
- Add equal amounts of HCl and NaCO3 to a tests tube
- Add bung with delivery tube to a test tube
- Delivery tube is connected to test tube with limewater (CaOH)
- CO3(2-) ions react with H+ ions to produce CO2 gas
- CO2 causes limewater to be milky
2
Q
Method for testing for SULFATE ions
A
- Add HCl then add BaCl to sample
- BaSO4 will form (white precipitate)
3
Q
Sulfate Ion
A
SO4(2-)
4
Q
Carbonate ion
A
CO3(2-)
5
Q
Halide ions
A
X(-)
6
Q
Method for testing for HALIDE ions
A
- Add sample to a test tube.
- Add HNO3 to test tube then add AgNO3
7
Q
Colours of precipitate of HALIDE test
A
No precipitate = AgF
White = AgCl
Cream = AgBr
Yellow = AgI
8
Q
Natural state/colour of CHLORINE at room tempertature
A
- Gas
- Green
9
Q
Natural state/colour of FLUORINE at room tempertature?
A
- Gas
- Yellow
10
Q
Natural state/colour of BROMINE at room tempertature?
A
- Liquid
- Brown/Red
11
Q
Natural state/colour of IODINE at room tempertature?
A
- Solid
- Grey/Black (shiny)
12
Q
Method for testing for AMMONIUM IONS
A
- Add 10 drops of sample to test tube
- Add 10 drops of NaOH to test tube and mix/swirl
- Place the test tube in a water bath and heated gently
- Hold damp red litmus paper near mouth of test tube
- Ammonia gas is produced which causes the red litmus paper to turn blue.
13
Q
Colour of CHLORINE in WATER and CYCLOHEXANE
A
Pale Green
14
Q
Colour of BROMINE in WATER and CYCLOHEXANE
A
Orange
15
Q
Colour of IODINE in WATER
A
Brown
