AQA Jun 2015 Paper 5 Q7

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section b answer all questions in the spaces provided do not write outside the box a a sample of solid chromium iii hydroxide displays amphoteric character when treated separately with dilute hydrochloric acid and with dilute aqueous sodium hydroxide write an ionic equation for each of these reactions include the formula of each complex ion formed describe the changes that you would observe in each reaction marks wmp jun chem do not write outside the box b aqueous solutions of copper ii sulfate and cobalt ii sulfate undergo ligand substitution reactions when treated separately with an excess of dilute aqueous ammonia write equations for these reactions include the formulae for any complex ions describe the changes that you would observe in each reaction marks turn over for the next question turn over wmp jun chem

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