AQA Jan 2012 Paper 5 Q4

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do not write outside the box the diagram below shows a cell that can be used to measure the standard electrode potential for the half reaction fe aq e fe aq in this cell the electrode on the right hand side is positive h g fe so aq feso aq a identify solution a and give its concentration state the other essential conditions for the operation of the standard electrode that forms the left hand side of the cell solution a conditions marks b identify the material from which electrodes b are made give two reasons why this material is suitable for its purpose material reason reason marks wmp jan chem do not write outside the box c identify a solution that could be used in c to complete the circuit give two reasons why this solution is suitable for its purpose solution reason reason marks d write the conventional representation for this cell mark e the voltmeter v shown in the diagram of the cell was replaced by an ammeter e i write an equation for the overall cell reaction that would occur mark e ii explain why the ammeter reading would fall to zero after a time mark turn over wmp jan chem

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