2.6 Aqueous Ions
No description yet. This curated deck is ready for daily study.
Card preview (18)
What is the definition of a Lewis Acid?
Electron pair acceptor
What is the definition of a Lewis Base?
Electron pair donator
What acts as the Lewis base in a complex ion?
The ligands
What is the equation of a 2+ metal aqua ion at equilibria?
[M(H2O)6]2+ + H2O >< [M(h2O)5(OH)]+ + H3O+
Why are 3+ ions more acidic than 2+ ion metal aqua ions?
• Higher charge density • Greater polarising power • More strongly attracts h2O • Weakens O-H bond more easily so more H+ released
What colour is [CuCl4]2-?
Green solution
What colour is [FeCl4]2-?
Yellow
How are chloride complex ions changed to hexa aqua ions?
Excess water added
What colour is [Cu(H2O)6]2+?
Blue solution
What colour is [Fe(H2O)6]2+?
Green solution
What does adding a few drops of NH3 to [Fe(H2O)6]2+ form?
[Fe(OH)2(H2O)4 Green precipitate
If [Fe(OH)2(H2O)4] is exposed to air what forms?
Brown precipitate Fe(OH)3(H2O)3
What colour precipitate is CuCO3?
Blue precipitate
What colour is [Al(H2O)6] 3+?
Colourless
What colour is [Fe(H2O)6]3+?
Yellow
How is Al(OH)3(H2O)3 formed from [Al(H2O)6]?
Few drops of NH3/ OH-
What is formed when [Al(H2O)6]3+ reacts with CO3 2-?
White precipitate Al(OH)3(h2O)3 Bubbles of Co2
What is formed when [Fe(H2O)6] 3+ reacts with CO2
Fe(OH)3(H2O)3 Brown precipitate Bubbles of CO2