AQA Jan 2013 Paper 2 Q9

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concentrated sulfuric acid reacts with solid potassium iodide as shown in the equation do not write outside the box ki h so l khso h s h o give two observations that you would make when this reaction occurs in terms of electrons state what happens to the iodide ions in this reaction state the change in oxidation state of sulfur that occurs during this formation of h s and deduce the half equation for the conversion of h so into h s marks turn over for the next question turn over wmp jan chem

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