AQA Jun 2015 Paper 5 Q8

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do not write outside the box a a green solution x is thought to contain fe h o ions the presence of these ions can be confirmed by reacting separate samples of solution x with aqueous ammonia and with aqueous sodium carbonate write equations for each of these reactions and describe what you would observe marks wmp jun chem do not write outside the box b a cm sample of solution x was added to cm of dilute sulfuric acid and made up to cm of solution in a volumetric flask a cm sample of this solution from the volumetric flask was titrated with a mol dm solution of kmno at the end point of the reaction the volume of kmno solution added was cm b i state the colour change that occurs at the end point of this titration and give a reason for the colour change marks b ii write an equation for the reaction between iron ii ions and manganate vii ions use this equation and the information given to calculate the concentration of iron ii ions in the original solution x marks turn over for the next question turn over wmp jun chem

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