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31 Cards in this Set
- Front
- Back
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[Co(H20)6] 2+
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pink solution
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define metal aqua complex ion
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a species formed when transition metals dissolve in water. the water molecules form coordinate bonds with a central transition metal ion
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define ligand
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An atom, ion or molecule that donates a pair of electrons to a central metal ion in a complex ion
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[Cu(H2O)6] 2+
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blue solution
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[Co (H20)6] 2+ with OH- or NH3
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Co(H20)4(OH)2
blue-green precipitate |
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[Co (H20)6] 2+ with excess NH3
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[Co(NH3)6] 2+
Straw coloured/pale brown solution |
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[Co (H20)6] 2+ with Na2CO3
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CoCO3
pink precipitate |
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[Cu(H2O)6] 2+ with OH-, or NH3
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Cu(H2O)4(OH)2
blue precipitate |
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[Cu(H2O)6] 2+ with excess NH3
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[Cu(NH3)4(H2O)2] 2+
Deep blue solution |
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[Cu(H2O)6] 2+ with Na2CO3
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CuCO3
green-blue precipitate |
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[Fe(H2O)6] 2+
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green solution
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[Fe(H2O)6] 2+ with OH- or NH3
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Fe(H2O)4(OH)2
green precipitate |
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[Fe(H2O)6] 2+ with Na2CO3
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FeCO3
green precipitate |
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[Al(H2O)6] 3+
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Colourless solution
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[Al(H2O)6] 3+ with OH- or NH3
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Al(H2O)3(OH)3
White precipitate |
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[Al(H2O)6] 3+ with excess OH-
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[Al(H2O)2(OH)4]-
Colourless solution |
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excess OH- only affects which 2 metal aqua ions?
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Aluminium (III) and Chromium (III)
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excess NH3 only affects which 3 metal aqua ions?
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Colbalt (II), Copper(II) and Chromium (III)
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[Al(H2O)6] 3+ with Na2CO3
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Al(H2O)3(OH)3
White precipitate |
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[Cr(H2O)6] 3+ with OH- or NH3
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Cr(H2O)3(OH)3
Green precipitate |
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[Cr(H2O)6] 3+
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violet solution
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[Cr(H2O)6] 3+ with excess OH-
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[Cr(OH)6] 3-
green solution |
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[Cr(H2O)6] 3+ with excess NH3
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[Cr (NH3)6] 3+
Purple solution |
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[Cr(H2O)6] 3+ with Na2CO3
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Cr(H2O)3(OH)3
Green precipitate |
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[Fe(H2O)6] 3+
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yellow solution
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[Fe(H2O)6] 3+ with OH- or NH3
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Fe(H2O)3(OH)3
brown precipitate |
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[Fe(H2O)6] 3+ with Na2CO3
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Fe(H2O)3(OH)3
brown precipitate |
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3+ ions are stronger _______ than 2+
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lewis acids
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why are 3+ ions stronger acids than 2+
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3+ have a smaller mass to charge ratio
3+ have a higher charge and smaller atomic radius |
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define lewis acid
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a species that accepts an electron pair in a coordinate bond
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define lewis base
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electron pair donor in a coordinate bond
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