QA Test for Anions Flashcards
1
Q
Method for NO3- (nitrate)
A
- Add dilute NaOH (aq)
- Add a piece of aluminium foil/powder
- Warm mixture and test gas liberated (NH3) with a piece of moist red litmus paper
2
Q
Observation for NO3- (nitrate)
A
Ammonia is liberated; moist red litmus paper turns blue
3
Q
Method for CO3 2- (carbonate)
A
- Add dilute HCl/any acid
- Bubble gas into limewater
4
Q
Observation for CO3 2- (carbonate)
A
Carbon dioxide is liberated; effervescence is produced, white precipitate is formed in limewater
5
Q
Method for Cl- (chloride)
A
- Add dilute nitric acid
- Add silver/lead (II) nitrate
6
Q
Observation for Cl- (chloride)
A
White precipitate of silver/lead (II) chloride is formed
7
Q
Method for I- (iodide)
A
- Add dilute nitric acid
- Add silver/lead (II) nitrate
(Same as chloride)
8
Q
Observation for I- (iodine)
A
Yellow precipitate of silver/lead (II) iodide formed
9
Q
Method for SO4 2- (sulfate)
A
- Add dilute nitric acid
- Add barium/ calcium chloride/ nitrate
10
Q
Observation for SO4 2- (sulfate)
A
White precipitate of barium/calcium sulfate is formed