3.4 transition metals 0.0 / 5 ? ChemistryTransition metalsA2/A-levelWJEC Created by: IsabellaCreated on: 21-12-19 23:23 What are the most important oxidation states of Cr? +3, +6 1 of 28 What are the most important oxidation states of Mn? +2, +4, +7 2 of 28 What are the most important oxidation states of Fe? +2, +3 3 of 28 What are the most important oxidation states of Co? +2, +3 4 of 28 What are the most important oxidation states of Cu? +1 5 of 28 Colour and shape of [Cu(H2O)6]2+ Deep violet, octahedral 6 of 28 Colour and shape of [Cu(NH3)4(H2O)2]2+ Deep royal blue, octahedral 7 of 28 Colour and shape of [Co(H2O)6]2+ Pink, octahedral 8 of 28 Colour and shape of [CuCl4]2‒ Yellow/green, tetrahedral 9 of 28 Colour and shape of [CoCl4]2– Blue, tetrahedral 10 of 28 Colour of aqueous solutions containing Cr3+ Violet 11 of 28 Colour of aqueous solutions containing CrO4^2- Yellow 12 of 28 Colour of aqueous solutions containing Cr2O7^2- Orange 13 of 28 Colour of aqueous solutions containing MnO4^- Purple 14 of 28 Colour of aqueous solutions containing Co^2+ Bright pink 15 of 28 Colour of aqueous solutions containing Fe^2+ Pale green 16 of 28 Colour of aqueous solutions containing Fe^3+ Yellow/brown 17 of 28 Colour of aqueous solutions containing Cu^2+ Blue 18 of 28 Catalyst used in the Haber process Iron 19 of 28 Catalyst used in the hydrogenation of alkenes nickel 20 of 28 Catalyst used in addition polymerisation Ziegler catalyst (TiCl4) 21 of 28 Catalyst used in the contact process Vanadium pentoxide 22 of 28 Catalyst used in decomposition of hydrogen peroxide Manganese (IV) oxide 23 of 28 Reaction of Cr^3+ with with OH- Violet-->grey/green ppt-->green solution 24 of 28 Reaction of Fe^2+ with with OH- Pale green-->gelatinous green ppt--> X 25 of 28 Reaction of Fe^3+ with with OH- Yellow-->rusty brown ppt-->X 26 of 28 Reaction of Cu^2+ with with OH- Blue-->blue gelatinous precipitate-->X 27 of 28 Reaction of Zn^2+ with with OH- Colourless-->white gelatinous ppt-->colourless solution 28 of 28
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