reactions of halide ions Flashcards
1
Q
how is a halide tested for and confirmed?
A
- test with silver nitrate
- confirm with ammonia
2
Q
state the 3 steps in testing for halides
A
- add dilute HNO3
- add AgNO3
- add NH3
3
Q
what is the purpose of adding HNO3?
A
reacts with any anions other than halides
- eg carbonates
4
Q
what is the observation when adding AgNO3?
A
Cl = white ppt
Br = cream ppt
I = yellow ppt
5
Q
what is the observation when adding NH3?
A
Cl = dissolves in dilute
Br = dissolves in conc
I = insoluble in conc
