Edexcel Jun 2015 (IAL) Paper 3 Q1

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Answer ALL the questions. Write your answers in the spaces provided. (a) A series of tests is carried out on a white solid, X, which contains one cation and one anion. Complete the table below. Test (i) Carry out a flame test on X Observation A persistent yellow colour Inference (Name or formula) The cation in X is(ii) Add dilute hydrochloric acid to the solid X Effervescence Bubble the gas given off into limewater The limewater turns cloudy The anion in X is(1) (1) (iii) Write a balanced equation, including state symbols, for the reaction between the gas formed in the reaction in (a)(ii) and limewater (calcium hydroxide solution). (b) Another white solid, Y, also contains one cation and one anion. Complete the table below. Test Observation Inference (i) (ii) Carry out a flame test on Y Add dilute nitric acid and dilute aqueous silver nitrate to a solution of YStrontium ions are present The anion in Y is probably a chloride (2) (1) (1) *P44883A0216*<br /> (iii) A further test is carried out on the mixture formed in (b)(ii). This confirms that Y contains chloride ions, and not bromide or iodide ions. Describe this test and give the result. (2) TestResult(iv) What would you observe when the mixture formed in (b)(ii) is left to stand in sunlight? Name the product responsible for this observation. (2) ObservationProduct(c) When aqueous solutions of X and Y are mixed, a white precipitate forms. Write an ionic equation for the reaction which produces the white precipitate. State symbols are not required. (1) (Total for Question 1 = 11 marks) *P44883A0316* Turn over<br />

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