| 1.
Sodium hydroxide with calcium sulphate
No precipitate is formed since
calcium hydroxide is soluble in water.
|
 |
|
CaSO4 + 2NaOH
Na2SO4
+ Ca(OH)2 |
2.
Sodium
hydroxide with iron III chloride
A red-brown precipitate is
formed.
|
 |
|
FeCl3+
3NaOH
3NaCl +
Fe(OH)3↓ |
|