AQA Jun 2015 Paper 5 Q6

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table contains some standard electrode potential data do not write outside the box table electrode half equation cl h o h o f e f au e au hocl h e cl e o h e cl ag e fe e h e fe e ag fe h fe e v a in terms of electrons explain the meaning of the term oxidising agent mark b identify the weakest oxidising agent in table explain your choice marks weakest oxidising agent explanation wmp jun chem do not write outside the box c write the conventional representation of the cell used to measure the standard electrode potential for the ag ag electrode state the conditions necessary when measuring this value marks conventional representation conditions d use data from table to explain in terms of redox what happens when a soluble gold i compound containing au ions is added to water state what you would observe write an equation for the reaction that occurs marks explanation observation equation question continues on the next page turn over wmp jun chem do not write outside the box table is repeated below to help you answer these questions table electrode half equation cl h o h o f e f au e au hocl h e cl e o h e cl ag e fe e h e fe e ag fe h fe e v e a cell is made by connecting fe fe and ag ag electrodes with a salt bridge e i calculate the e m f of this cell mark answer e ii suggest why potassium chloride would not be suitable for use in the salt bridge of this cell mark wmp jun chem do not write outside the box f use data from table to explain what happens when a solution of iron ii chloride is exposed to the air marks turn over wmp jun chem

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