Edexcel Jan 2014 (IAL) Paper 3 Q1

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Answer ALL the questions. Write your answers in the spaces provided. 1 A series of tests was carried out on X, a white solid, which is known to contain one cation and one anion. (a) X gave a pale green colour in a flame test. Give the name or formula of the cation in X. (1)(b) When dilute nitric acid was added to a sample of solid X, no reaction occurred. Suggest the name or formula of an anion that could not be present in X. (1)(c) Dilute nitric acid was added to an aqueous solution of X, and then aqueous silver nitrate was added to the mixture. A white precipitate formed, which dissolved in dilute aqueous ammonia. Give the name or formula of the anion in X. (1)(d) A sample of the white precipitate in (c) was left to stand in sunlight. (i) What colour change would be seen? (1)(ii) Name the substance responsible for the new colour that appeared in (d)(i). (1)*P42974RA0216*<br /> (e) Dilute sulfuric acid was added to an aqueous solution of X. (i) What change would be observed? (1)(ii) Write an equation for the reaction in (e)(i). Include state symbols. (f) (i) A few drops of concentrated sulfuric acid were added to a small portion of solid X in a test tube. Misty fumes, but no other vapours, were seen. Identify these fumes by name or formula. (2) (1)(ii) Describe a further chemical test to confirm the identity of the gas responsible for the misty fumes. Give the expected result of the test. (2) TestResult(Total for Question 1 = 11 marks) *P42974RA0316* Turn over<br />

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