Testing for carbonate and sulfate ions

Question 1

How do we test for carbonate ions?

Answer 1

= adding dilute nitric acid
= effersecence should be seen
= test the gas with lime-water if it turns cloudy it is co2, carbonate is present continye until no gas is produced

Question 2

How do we test for sulfate ions?

Answer 2

= add barium nitrate solution
= white precipitate of barium sulfate forms, showing sulfate is present
= add excess to make sure all sulfate ions are precipitate
= and filter