Ion Tests

Question 1

CARBONATE TEST

Answer 1

1) Add dilute acid (H2SO4)
2) Carbon dioxide will be produced

*Bubble through limewater to check because CO2 makes limewater turn cloudy.

Question 2

SULPHATE TEST

Answer 2

1) Add dilute HCL
2) Add barium Chloride
3) A white Precipitate will form

*This white Precipitate is Barium Sulphate as it is insoluble.

Question 3

HALIDE TEST

Answer 3

1) Add Nitric acid
2) Add Silver nitrate
3) White precipitate - AgCl
Cream precipitate- AgBr
Yellow precipitate- AgI

*AgFl is soluble and so wont form a precipitate.

Question 4

DISTINGUISHING HALIDES

Answer 4

1) Add dilute NH3
* Cl will dissolve
Br will NOT dissolve
I will NOT dissolve

2) Add excess NH3
* Br will dissolve
I will NOT dissolve

Question 5

AMMONIUM TEST

Answer 5

1) Add NaOH
2) Litmus paper will turn blue

• Ammonia is an alkaline gas.