AQA Jun 2012 Paper 2 Q5

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do not write outside the box there are many uses for compounds of barium a i write an equation for the reaction of barium with water mark a ii state the trend in reactivity with water of the group metals from mg to ba mark b give the formula of the least soluble hydroxide of the group metals from mg to ba mark c state how barium sulfate is used in medicine explain why this use is possible given that solutions containing barium ions are poisonous use explanation marks extra space wmp jun chem

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