Reactions of metal-aqua ions

Pregunta	Respuesta
What are the 5 transition metals we study that form metal aqua ions?	Co Cu Fe Al Cr Fe
Which are 2+?	Co Cu Fe
Which are 3+?	Al Cr Fe
How many water ligands are attached to each of the central metal ions?	6
What are the 3 reagents we need to remember the reaction colours of?	Na₂CO₃ OH¯ NH₃
What colour is the [Cu(H₂O)₆]²⁺ ion?	Blue
What colour is the [Cr(H₂O)₆]³⁺ ion?	Ruby
What colour is the [Al(H₂O)₆]³⁺ ion?	Colourless
What colour is the [Co(H₂O)₆]²⁺ ion?	Pink
What colour is the [Fe(H₂O)₆]³⁺ ion?	Violet
What colour is the [Fe(H₂O)₆] ²⁺ ion?	Green
When the [Fe(H₂O)₆] ²⁺ ion is reacted with OH¯ or NH₃, what is formed? (Formula and physical appearance)	Green precipitate Fe(H₂O)₄(OH)₂
If the same ion ([Fe(H₂O)₆] ²⁺) is reacted with Na₂CO₃ the physical appearance is the same however the formula of the precipitate is different. What is this formula?	FeCO₃
The [Fe(H₂O)₆]²⁺ reactions are different to the [Fe(H₂O)₆]³⁺ reactions. What colour precipitate is formed in all the reactions of the ³⁺ ion? (with Na₂CO₃, OH¯ and NH₃)	Brown
How many moles of [Fe(H₂O)₃(OH)₃] are made in the reactions of [Fe(H₂O)₆]³⁺ with OH- or NH₃?	1
How many are made in the reaction with Na₂CO₃?	2
What colour precipitate is made when [Co(H₂O)₆]²⁺ is reacted with Na₂CO₃?	Pink
What is the formula of this precipitate?	CoCO₃
The same colour precipitate is formed when [Co(H₂O)₆]²⁺ is reacted with dilute ammonia and with OH-. What colour is this precipitate?	Blue-green
Is the formula of the precipitate the same?	Yes
What is the formula?	Co(H₂O)₄(OH)₂
What colour solution is formed when [Co(H₂O)₆]²⁺ reacts with excess ammonia?	Straw
What is the formula of the complex ion which makes this solution appear straw coloured?	[Co(NH₃)₆]²⁺
The [Al(H₂O)₆]³⁺ ion is colourless. In what reaction (with ammonia/hydroxide, excess ammonia, excess hydroxide or sodium carbonate) does the solution remain colourless?	Excess hydroxide
What is the formula of the ion formed in this reaction?	[Al(OH)₄]¯
The same colour precipitate is formed in the three other reactions. What colour is this?	White
For the reactions with ammonia/hydroxide, excess ammonia, and sodium carbonate the same white precipitate is made. What is the formula of this?	Al(H₂O)₃(OH)₃
What is the only difference between the reactions of hydroxide/ammonia and the reaction of sodium carbonate?	Reaction with sodium carbonate - 2 moles of Al(H₂O)₃(OH)₃ formed
What colour is the [Cr(H₂O)₆]³⁺ ion?	Ruby
When it is reacted with excess ammonia, what colour does the solution go and what is the formula of the ion responsible for the appearance of this colour?	Purple [Cr(NH₃)₆]³⁺
Out of the reactions of [Cr(H₂O)₆]³⁺ with - hydroxide/ammonia -excess hydroxide -sodium carbonate Which forms a green precipitate and which forms a green solution?	[Cr(H₂O)₆]³⁺ and hydroxide/ammonia = green precipitate [Cr(H₂O)₆]³⁺ and excess hydroxide = green solution [Cr(H₂O)₆]³⁺ and sodium carbonate = green solution
What is the formula of the green precipitate?	Cr(H₂O)₃(OH)₃ 2[Cr(H₂O)₃(OH)₃] for reaction with Na₂CO₃
What is the formula of the green solution formed when the [Cr(H₂O)₆]³⁺ reacts with an excess of hydroxide?	[Cr(H₂O)₆]³¯
The [Cu(H₂O)₆]²⁺ ion is ____	Blue
When the [Cu(H₂O)₆]²⁺ ion reacts with hydroxide or ammonia (not in excess) or with an excess of hydroxide, a ____ __________ is formed	Blue precipitate
What is the formula of this precipitate?	Cu(H₂O)₄(OH)₂
A deep blue solution is formed when [Cu(H₂O)₆]²⁺ reacts with...	Excess NH₃
What is the charge of the complex ion that makes this solution appear deep blue?	2+
What is the formula of this complex ion?	[Cu(NH₃)₄(H₂O)₂]²⁺
What is happens when the [Cu(H₂O)₆]²⁺ ion reacts with sodium carbonate?	CuCO₃, a green-blue precipitate is formed

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