Use care when handling 6M HCl and 6M NaOH. They are both corrosive and toxic.
Chemicals and Solutions
- 0.1M Cu(SO₄) Copper sulfate
- Dilute(approx. 2%) or conc. Ammonium chloride
- 6M Hydrochloric acid
- 6M Sodium hydroxide
- 2 small hydrometer cylinders
- 2 stirring rods
Follow the table below for each solution.
|Add to each beaker||Iron (III) sulfate||Copper sulfate|
|Starting color:||clear rustish||clear pale blue|
|Add 1 part 2% ammonia||gelatinous rustish||powder blue ppt to dark blue|
|+1 part 2% ammonia||still gelatinous rustish||dark blue to super blue|
|Add 1 part 6M HCl||yellow||pale blue|
|+1 part 6M HCl||yellow||blue/green|
|+1 part 6M HCl||yellow||green/blue|
|+1 part 6M HCl||yellow||green|
Substances that can act as either acids or bases are described as amphoteric.