Testing for group 2 ions and anions

Question 1

How can we test for So4^2- and CO3^2- ions?

Answer 1

= barium chloride
= forms a white precipitate when added

Ba2+ + Co3^2-= BaCo3
Ba2+ + So4^20

Question 2

How can we test for carbonate ions?

Answer 2

= add hydrochloric acid and nitric acid
Obsvervation: efferescence
= forms co2 and h20
Co3 (2minues) + 2H+ ==> co2 + H2O

Question 3

How can we test for So4^2-?

Answer 3

= adding hcl
= Bacl2
= forms barium sulfate which is a white precipitate

Question 4

How can we test for mg ions?

Answer 4

= adding hydroxide ions
= Mg2+ + 2OH- ==> mg(OH)2

Question 5

What do we say if there is no observation?

Answer 5

= there is no visible change