CIE Nov 2015 v1 Paper 4 Q3

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The transition element iron is the most abundant element in the Earths core. PMT (a) What is meant by the term transition element?[1] (b) In aqueous solution, iron can form complex ions which contain ligands. (i) Name the type of bonding that occurs between a ligand and a transition element.[1] (ii) Which of the following species can act as a ligand? Complete the table by placing a tick () in the appropriate column to indicate whether the species can act as a ligand or not. can act as a ligand cannot act as a ligand species NO3 BF3 H2NCH2CH2NH2 NH4 [2] (c) Manganese ions, Mn2+(aq), show some similar chemical properties to those of copper(II) ions, Cu2+(aq). Use this information and the Data Booklet to suggest the formula of the manganese species formed in each of the following reactions. State the type of reaction taking place in each case. formula of manganese species formed type of reaction Mn2+(aq) + NaOH(aq) Mn2+(aq) + concentrated HCl Mn2+(aq) + H2O2(aq)UCLES 2015 9701/41/O/N/15 [5] [Total: 9] [Turn over<br />

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