Exam (elaborations) AQA A Level Chemistry
AQA A Level Chemistry - Paper 3 what colour is {Fe(H2O)6}2+ - ANSWER pale green Transition Metal definition - ANSWER D block elements that form at least one stable ion with a partially filled d orbital Classic elements which are not transition metals despite being D-Block elements - ANSWER Scandium and Zinc properties of transition metals which are NOT shared by other metals - ANSWER - multiple oxidation states -coloured ions in solution -great catalysts -form complexes with ligands ligand - ANSWER a molecule which forms a dative bond with a transition metal complex ion - ANSWER A transition metal ion bonded to one or more ligands by coordinate bonds co-ordination number - ANSWER The number of co-ordinate bonds formed to a central metal ion What is an example of incomplete ligand substitution? - ANSWER [Cu(NH3)6]2+ to [Cu(NH3)4(H2O)2]2+ why does the coordination number not change when substituting water for ammonia ? - ANSWER because they are of a similar size Why does incomplete ligand substitution usually occur? - ANSWER when substituting ligands of a different size Denticity - ANSWER the number of dative bonds that can be formed with a transition metal by one ligand bidentate - ANSWER When a ligand can form two co-ordinate bonds in a complex ion. monodentate (or unidentate) - ANSWER A ligand that can form one bond
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aqa a level chemistry
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aqa a level chemistry paper 3
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