Testing for - ions Flashcards
1
Q
what is group 7 called
A
halogens
2
Q
what are group 7 ions called
A
halide
3
Q
how do we test for halide ion
A
add HNO3 (nitric acid) and AgNO3 (silver nitrate) together.
then add the halide ion of your choice
4
Q
what were the results for halide ions
A
Cl- formed a white precipitate (silver chloride)
Br- formed a creamy precipitate (silver bromide)
I- formed a yellow precipitate (silver iodide)
5
Q
How do you test for sulfate ions
A
SO4(2-)
You add nitric acid and barium chloride to sulfate
6
Q
what happens to sulfate when reacted
A
becomes a white precipitate of barium sulfate
7
Q
how do you test for carbonate ions
A
CO3(2-)
carbonate ions react with acid to make CO2 gas
add nitric acid and see if CO2 bubbles off
you can add limewater to see if it goes cloudy
