Edexcel Jun 2013 Paper 3 Q1

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Answer ALL the questions. Write your answers in the spaces provided. 1 Tests were carried out on compounds X, Y and Z. Complete the tables below. (a) Compound X is a white, water-soluble solid. Test Observation Inference (Name or formula) (i) Flame test Lilac flame (ii) (iii) To a solution of X, add barium chloride solution and acidify with hydrochloric acid To a solution of X, add dilute nitric acid followed by(iv) Add concentrated aqueous ammonia solution to the mixture remaining from test (iii)Sulfate ions absent Iodide ions presentConfirms presence of iodide ions (v) The formula of X is:(b) Compound Y is a white solid that is insoluble in water. (1) Test Observation Inference (Name or formula) (i) Flame test Yellow-red (brick red) flame (ii) Add dilute hydrochloric acid to Y The mixture fizzed and the solidBubble the gas through It turned milky CO2 evolved(iii) The formula of Y is:(1) *P41652A0212* (1) (1) (2) (1) (1) (2)<br /> (c) Z is a colourless organic liquid with only one functional group. Z is completely miscible with water to form a neutral solution. Test Observation Inference (i) Add bromine water to Z No colour change (ii) Add solid phosphorus(V) chloride, PCl5, to Z Misty fumes (of hydrogen chloride)(iii) Warm Z with potassium dichromate(VI) solution and dilute sulfuric acid Colour changes from orange to green Z could beor(1) (1) (2) (d) The composition by mass of Z is C 60.0%, H 13.3%, O 26.7%. (i) Calculate the empirical formula of Z. (ii) The molecular formula of Z is the same as its empirical formula. Give the displayed formulae of the two possible isomers of Z. (2) (2) (Total for Question 1 = 18 marks) *P41652A0312* Turn over<br />

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