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INORGANIC CHEM - REACTIONS OF IONS IN AQ SOLUTION

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

#1
Front (Question)

What colour is a solution of [Cu(H2O)6]^2+ ions?

Back (Answer)

blue

#2
Front (Question)

What colour is a solution of [Fe(H2O)6]^2+ ions?

Back (Answer)

green

#3
Front (Question)

What colour is a solution of [Fe(H2O)6]^3+ ions?

Back (Answer)

yellow-brown

#4
Front (Question)

What colour is a solution of [Al`(H2O)6]^3+ ions?

Back (Answer)

colourless

#5
Front (Question)

Why can complexes act as acids?

Back (Answer)

• metal ion weakens O-H bond in water ligand • this can break the bond forming OH^- ligand and H^+ in solution

#6
Front (Question)

How does the charge of a complex affect acidity? Why?

Back (Answer)

• as charge of the complex increases, acidity decreases • metal complexes with a higher charge weaken the OH bond most

#7
Front (Question)

[Fe(H2O)6]^2+ with OH^-: - observation - equation

Back (Answer)

• green solution -> green ppt • [Fe(H2O)6]^2+ + 2OH^- -> [Fe(H2O)4(OH)2] + 2H2O

#8
Front (Question)

[Cu(H2O)6]^2+ with OH^-: - observation - equation

Back (Answer)

• blue solution -> blue ppt • [Cu(H2O)6]^2+ + 2OH^- -> [Cu(H2O)4(OH)2] + 2H2O

#9
Front (Question)

[Fe(H2O)6]^3+ with OH^-: - observation - equation

Back (Answer)

• brown solution -> brown ppt • [Fe(H2O)6]^3+ + 3OH^- -> [Fe(H2O)3(OH)3] + 3H2O

#10
Front (Question)

[Al(H2O)6]^3+ with OH^-: - observation - equation

Back (Answer)

• colourless solution -> white ppt • [Al(H2O)6]^3+ + 3OH^- -> [Al(H2O)3(OH)3] + 3H2O

#11
Front (Question)

[Fe(H2O)6]^2+ with excess OH^-: - observation - equation

Back (Answer)

• no visible reaction • no equation

#12
Front (Question)

[Cu(H2O)6]^2+ with excess OH^-: - observation - equation

Back (Answer)

• no visible reaction • no equation

#13
Front (Question)

[Fe(H2O)6]^3+ with excess OH^-: - observation - equation

Back (Answer)

• no visible reaction • no equation

#14
Front (Question)

[Al(H2O)6]^3+ with excess OH^-: - observation - equation

Back (Answer)

• white ppt -> colourless solution • [Al(H2O)6]^3+ + 4OH^- -> [Al(H2O)2(OH)4]^- + 4H2O • [Al(H2O)3(OH)3] + OH^- -> [Al(H2O)2(OH)4]^- + H2O

#15
Front (Question)

[Fe(H2O)6]^2+ with NH3: - observation - equation

Back (Answer)

• green solution -> green ppt • [Fe(H2O)6]^2+ + 2NH3 -> [Fe(H2O)4(OH)2] + 2NH4^+

#16
Front (Question)

[Cu(H2O)6]^2+ with NH3: - observation - equation

Back (Answer)

• blue solution -> blue ppt • [Cu(H2O)6]^2+ + 2NH3 -> [Cu(H2O)4(OH)2] + 2NH4^+

#17
Front (Question)

[Fe(H2O)6]^3+ with NH3: - observation - equation

Back (Answer)

• brown solution -> brown ppt • [Fe(H2O)6]^3+ + 3NH3 -> [Fe(H2O)3(OH)3] + 3NH4^+

#18
Front (Question)

[Al(H2O)6]^3+ with NH3: - observation - equation

Back (Answer)

• colourless solution -> white ppt • [Al(H2O)6]^3+ + 3NH3 -> [Al(H2O)3(OH)3] + 3NH4^+

#19
Front (Question)

[Fe(H2O)6]^2+ with excess NH3: - observation - equation

Back (Answer)

• no visible reaction • no equation

#20
Front (Question)

[Cu(H2O)6]^2+ with excess NH3: - observation - equation

Back (Answer)

• blue ppt -> deep blue solution • [Cu(H2O)4(OH)2] + 4NH3 -> [Cu(H2O)2(NH3)4]^2+ + 2H2O + 2OH^-

#21
Front (Question)

[Fe(H2O)6]^3+ with excess NH3: - observation - equation

Back (Answer)

• no visible reaction • no equation

#22
Front (Question)

[Al(H2O)6]^3+ with excess NH3: - observation - equation

Back (Answer)

• no visible reaction • no equation

#23
Front (Question)

[Fe(H2O)6]^2+ with CO3^2-: - observation - equation

Back (Answer)

• green solution -> green ppt • [Fe(H2O)6]^2+ + CO3^2- -> FeCO3 + 6H2O

#24
Front (Question)

[Cu(H2O)6]^2+ with CO3^2-: - observation - equation

Back (Answer)

• blue solution -> blue-green ppt • [Cu(H2O)6]^2+ + CO3^2- -> CuCO3 + 6H2O