Exam (elaborations)
A-LEVEL AQA CHEMISTRY • TRANSITION METALS QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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A-LEVEL AQA CHEMISTRY • TRANSITION METALS QUESTIONS AND ANSWERS WITH SOLUTIONS 2024
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A-LEVEL AQA CHEMISTRY • TRANSITION METALS QUESTIONS AND ANSWERS WITH SOLUTIONS 2024 Transition Metal - ANSWER Metal that can form one or more stable ions with a partially filled d sub -level. Scandium isn't a TM because... - ANSWER Has an empty d -shell when Sc3+ Zinc isn't a TM because... - ANSWER Has a full d -shell when Zn2+ Which 2 TM have 1 electron in 4s sub -level to give stability? - ANSWER Chromium and Copper Which sub levels electrons fill up first and empty first? - ANSWER 4s What physical properties do they have? - ANSWER High density High melting and boiling points Similar ionic radii What chemical properties do they have? - ANSWER Form complex ions Form coloured ions Are good catalysts Can exist in variable oxidation states Complex ion - ANSWER Central metal atom/ion surrounded by co -ordinately bonded ligands. Co-ordinate bond (Dative covalent) - ANSWER Covalent bond in which both electrons in the shared pair come from the same atom. Ligand - ANSWER Is an atom/ion/molecule that donates a pair of electrons to a central metal ion to form a transition metal. Co-ordination number - ANSWER Number of co -ordinate bonds that are formed with the central metal ion. Lewis Base - ANSWER Lone pair donor. Lewis Acid - ANSWER Lone pair acceptor. How many small ligands like H20/NH3 can fit around the central metal ion? - ANSWER 6 How many larger ligands like Cl - can fit around the central metal ion? - ANSWER 4 Shape and bond angle of 6 Co -ordinate bonds - ANSWER Octahedral, 90 degrees. Example of 6 Co -ordinate bond complex - ANSWER [Fe(H20)6]2+ (hexaaquairon(ii)) Shape and bond angle of 4 Co -ordinate bonds - ANSWER Tethrahedral, 109.5 degrees. Examples of 4 Co -ordinate bond complex - ANSWER [CuCl4]2 - and [CoCl4]2 - Colour of [CuCl4]2 - - ANSWER Yellow Colour of [CoCl4]2 - - ANSWER Blue Ni 2+ and Pt 2+ complexes have 4 co -ordinate bonds with what shape and angle? - ANSWER Square planar, 90 degrees. Shape and bond angle of 2 Co -ordinate bonds - ANSWER Linear, 180 degreesThe benefits of buying summaries with Stuvia:
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