Transition metals
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28 Terms
What colour is [Fe(HO)]2+
Pale green solution
What colour is [Fe(HO)]3+
Yellow soltuion
What colour is [Cu(HO)]2+
Blue solution
What colour is [Al(HO)]3+
Colourless solution
What happens when NaOH and a metal 2+ ion react
A insoluble hydroxide precipitates
What happens when NaOH and a metal 3+ ion reacts
An insoluble hydroxide precipites
What is formed when NaOH is added dropwise to Fe2+
Green ppt of Fe(OH)2
What happens when excess NaOH is added to Fe2+
No change (insoluble)
what is formed when NaOh is added dropwise to Fe3+
Brown precipitate of Fe(OH)3
What happens when an excess of NaOH is added to Fe3+
No change (insoluble)
What is formed when NaOH is added dropwise to Cu2+
Blue precipitate of Cu(OH)2
What happens when an excess of NaOH is added to Cu2+
No change (insoluble)
What is formed when NaOH is added dropwise to Al3+
White precipitate of Al(OH)3
What happens when an excess of NaOH is added to Al3+
Dissolves to form a colourless solution of [Al(OH)]
What’s the dropwise reaction of dropwise ammonia added to the metal aqua ions
Same as when NaOH is added dropwise
What happens when excess NH3 is added to Fe2+
No change
What happens when excess NH3 is added to Fe3+
No change
What happens when excess NH3 is added to Cu2+
Deep blue solution [Cu(NH)(HO)]2+
What happens when excess NH3 is added to Al3+
No change
What is the equation for Cu2+ in excess NH3
[Cu(HO)]2+ + 4NH[Cu(NH)(HO)]2+ + 4HO
What happens when metal 2+ ions and sodium carbonate (Na2CO3) react
Insoluble metal carbonates
What happens when metal 3+ ions react with sodium carbonate (Na2CO3)
Undergo hydrolysis forming hydroxide precipitates and releasing CO2
What is formed when Fe2+ reacts with Na2CO3
Green FeCO3 precipitate
What is formed when FE3+ and Na2CO3 reacts
Brown Fe(OH)3 precipitate and CO2 effervescence
What is formed when Cu2+ and Na2CO3 reacts
Blue CuCO3 precipitate
What is formed when Al3+ and Na2CO3 reacts
White Al(OH)3 precipitate and CO2 effervescence
What happens when Cu2+ reacts with conc HCl (colour change)
Blue to yellow
What happens when Co2+ is reacted with HCl (colour change)
From pink to blue
Note 
Flashcards (84)