AQA Jan 2012 Paper 2 Q7

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do not write outside the box a group elements and their compounds have a wide range of uses for parts a i to a iii draw a ring around the correct answer to complete each sentence a i from mg oh to ba oh the solubility in water increases decreases stays the same mark a ii from mg to ba the first ionisation energy increases decreases stays the same mark a iii from mg to ba the atomic radius increases decreases stays the same mark b explain why calcium has a higher melting point than strontium marks extra space wmp jan chem do not write outside the box c acidified barium chloride solution is used as a reagent to test for sulfate ions c i state why sulfuric acid should not be used to acidify the barium chloride mark c ii write the simplest ionic equation for the reaction that occurs when acidified barium chloride solution is added to a solution containing sulfate ions mark turn over for the next question turn over wmp jan chem

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