Transition metals 2.0 / 5 based on 1 rating ? ChemistryTransition metalsA2/A-levelAQA Created by: jatyizationCreated on: 16-03-15 18:52 What is the meaning of that term 'Ligand'? A ligand is a species which can donate a pair of electrons to a metal ion to form a co-oridnate bond 1 of 15 What is the meaning of them term co-ordination number? Number of atoms bonded to a metal ion. 2 of 15 Why don't Cl- ions form octahedral shapes with metal ions? Cl- ions are too big 3 of 15 What are the uses of Ligands? Pt complex forms cis-platin; [Ag(NH3)2]+ forms tallness reagent; Fe(II) forms haemoglobin 4 of 15 What is the meaning of them term 'heterogenous catalyst'? Catalyst in a different phase to reactants 5 of 15 How can a catalyst be made more effective? Increase S.A; Spread catalyst to an inert support medium 6 of 15 How does poisoning reduce the effectiveness of catalysts? Poison adsorbed onto active sites of catalyst; Poison is not desorbed; Can no longer bind to reactants 7 of 15 What is the catalyst in the Haber process? Iron 8 of 15 Outline the reaction for the contact process. . 9 of 15 Which catalyst is used in the contact process? Vanadium oxide 10 of 15 What impurities are there in the Haber process? Sulfur compounds 11 of 15 Which catalyst is used in the manufacture of methanol? Chromium oxide (Cr2O3) 12 of 15 What is the meaning of the term 'Homogenous catalyst'? A catalyst in the same phase as the reactants 13 of 15 What is the meaning of them term autocatalysis? A reaction in which the product formed acts as a catalyst 14 of 15 How does Mn2+ act as a catalyst in the oxidation of ethanedioic acid? Mn2+ is formed and reacts with MnO4- and then forms the intermediate M3+ which reacts with CzO4- and reforms Mn2+ 15 of 15
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