Selected reactions of Cu & its compounds

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Last updated 1:44 AM on 9/11/26
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10 Terms

1
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Colour of [Cu(H2O)6']²+

blue

2
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Compound, colour & type of reaction of: [Cu(H2O)6']²+ & NaOH

  • Cu(OH)2 (s)

  • Pale blue ppt insoluble in excess NaOH

  • Precipitation


3
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Compound, color & type of reaction of: Cu(OH)2 (s) & heat

  • CuO (s)

  • Black ppt

  • Thermal decomposition


4
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Compound, colour & type of reaction of: [Cu(H2O)6']²+ & NH3

  • Cu(OH)2 (s)

  • Blue ppt, soluble in excess NH3

  • Precipitation


5
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Compound, colour & type of reaction of: Cu(OH)2 & excess NH3

  • [Cu(NH3)4(H2O)2]²+

  • Dark blue

  • Ligand exchange


6
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Compound, colour & type of reaction of: [Cu(H2O)6']²+ & Na2CO3 (aq)

  • CuCO3 (aq)

  • blue ppt

  • Precipitation


7
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Compound, colour & type of reaction of: [Cu(H2O)6']²+ & conc HCl

  • [CuCl4]²+ (aq)

  • Yellow

  • Ligand exchange


8
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Compound, colour & type of reaction of: [Cu(H2O)6']²+ & KI

  • CuI (s)

  • White ppt in brown solution

  • Redox


9
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Compound, colour & type of reaction of: CuI & Na2S2O3 (aq)

  • CuI (s)

  • White ppt in colorless solution

  • Redox


10
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Compound, colour & type of reaction of: CuI & excess Na2S2O3 (aq)

  • [Cu(S2O3)2]³- (aq)

  • White ppt dissolves in excess

  • Ligand exchange