Edexcel Jun 2011 Paper 5 Q16

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PMT 16 This question is about the transition metal iron and some of its compounds. (a) Give the electronic configuration of the Fe3+ ion and use this to define what is meant by a transition element. (2)*(b) Iron will act as a surface catalyst in some gaseous reactions. Outline the processes that take place during such catalysis and suggest two reasons to explain why the catalyst speeds up the reaction. (4)*P38480A01724* 17 Turn over<br /> PMT (c) One of the components of rust, found on objects made from iron, is iron(III) hydroxide, Fe(OH)3. Use items 17, 19 and 44 from the Standard Electrode Potential table in your data booklet to show how it is able to form in two steps, writing an equation for each step. (4) (d) Haemoglobin is a complex containing iron(II) ions. Describe how nitrogen atoms in the haemoglobin bond to the iron(II) ions. (2)(Total for Question 16 = 12 marks) TOTAL FOR SECTION B = 48 MARKS 18 *P38480A01824*<br />

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