Qualitative tests for ions

Question 1

Which gas forms when ammonium chloride is warmed with sodium hydroxide (aq) ?

Answer 1

Ammonia gas

Question 2

How to test for sulfate ions?

Answer 2

you first add hydrochloric acid and then add barium chloride solution

Question 3

What would a positive test for carbonate ions look like

Answer 3

the lime water would turn foggy and cloudy

Question 4

Whats the sulfate test?

Answer 4

aqueous barium ions are added to an unknown solution.

equation being Ba2+ (aq) + SO4^2-(aq) –> BaSO4(s)

Question 5

Whats the carbonate test?

Answer 5

1) in a test tube add dilute nitric acid to the solution being tested.
2) bubbling may indicate a carbonate being present.
3) bubble the gas through lime water and if it turns cloudy a white precipitate will have formed (of calcium carbonate)