inorganic tests

Question 1

Test for sulphates

Answer 1

• add bacl2
• makes baso4 which is a white ppt

Question 2

Test for carbonate

Answer 2

• add hno3 and bubble through limewater
• fizzing cloudy limewater turns milky
• carbon dioxide is made

Question 3

Test for halides

Answer 3

• add nitric acid followed by 1cm3 of silver nitrate
  agcl:
  white ppt forms
  dissolves in dilute ammonia
  agbr:
  cream ppt forms
  dissolves in conc ammonia
  agI:
  yellow ppt
  doesn’t dissolve in dilute or conc ammonia

Question 4

Test for metal ions
cu2+

Answer 4

• add naoh drop wise to excess
• blue copper hydroxide ppt forms
  cu 2plus + 2oh minus

Question 5

Test for metal ions
fe2+

Answer 5

• add naoh dropwise to excess
  -green iron hydroxide ppt forms

Question 6

Test for metal ions
fe3+

Answer 6

• add naoh dropwise to excess
• brown iron hydroxide ppt forms

Question 7

Test for metal ions
Zn2+

Answer 7

white zinc hydroxide ppt forms

Question 8

Test for metal ions
lead2+

Answer 8

-add naoh dropwise to excess
- white lead hydroxide ppt forms