1 Measuring electrode potentials

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Oxford Textbook Pages : 303 - 304

CGP Revision Guide Pages : 77

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Show Specification Ref : 3.1.11.1

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January 2013 QP – Unit 5 AQA Chemistry A-level_question_7 section b do not write outside the box answer all questions in the spaces provided this table shows some standard electrode potential data electrode half equation au aq e au s o g h aq e h o l ag aq e ag s fe aq e fe aq cu aq e cu s fe aq e fe s e v a draw a labelled diagram of the apparatus that could be connected to a standard hydrogen electrode in order to measure the standard electrode potential of the fe fe electrode in your diagram show how this electrode is connected to the standard hydrogen electrode and to a voltmeter do not draw the standard hydrogen electrode state the conditions under which this cell should be operated in order to measure the standard electrode potential conditions marks wmp jan chem do not write outside the box b use data from the table to deduce the equation for the overall cell reaction of a cell that has an e m f of v give the conventional cell representation for this cell identify the positive electrode marks c use data from the table to explain why au ions are not normally found in aqueous solution write an equation to show how au ions would react with water marks d use data from the table to predict and explain the redox reactions that occur when iron powder is added to an excess of aqueous silver nitrate marks turn over for the next question turn over wmp jan chem
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