Reactions of aqueous ions Flashcards
1
Q
What are the 4 hexa ions?
A
- Fe(H2O)6 2+
- Cu(H2O)6 2+
- Fe(H2O)6 3+
- Al(H2O)6 3+
2
Q
What is the colour of Fe(H2O)6 2+
A
Green Solution
3
Q
What is the colour of Cu(H2O)6 2+
A
- Blue solution
4
Q
What is the colour of Fe(H2O)6 3+
A
- Orange solution
5
Q
What is the colour of Al(H2O)6 3+
A
- Colourless solution
6
Q
What happens when Fe(H2O)6 2+ is added to NaOH in dropwise ?
A
- [Fe(H2O)6] 2+ + 2OH- → [Fe(H2O)4(OH)2] + 2H2O
- Green Solution → Green precipitate
7
Q
What happens when Cu(H2O)6 2+ is added to NaOH in dropwise?
A
- [Cu(H2O)6] 2+ + 2OH- → [Cu(H2O)4(OH)2] + 2H2O
- Blue solution → Blue precipitate
8
Q
What happens when Fe(H2O)6 3+ is added to NaOH in dropwise?
A
- [Fe(H2O)6] 3+ + 3OH- → [Fe(H2O)3(OH)3] + 3H2O
- orange solution → brown precipitate
9
Q
What happens when Al(H2O)6 3+ is added to NaOH in dropwise?
A
- [Al(H2O)6] 3+ + 3OH- → [Al(H2O)3(OH)3] + 3H2O
- colourless solution → white precipitate
10
Q
Which is the only hexa ion that reacts with excess NaOH
A
