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June 2017 (IAL) QP - Unit 3 Edexcel Chemistry a-level

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June 2017 (IAL) QP - Unit 3 Edexcel Chemistry a-level
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  Centre NumberCandidate NumberWrite your name here SurnameOther names  Total Marks Paper Reference P48384A ©2017 Pearson Education Ltd. 5/6/6/1/1/ *P48384A0120* Chemistry Advanced Subsidiary Unit 3: Chemistry Laboratory Skills I  Tuesday 9 May 2017 – Afternoon Time: 1 hour 15 minutes WCH03/01 Candidates must have: Scientific calculator Instructions ã   Use black   ink or black   ball-point pen. ã   Fill in the boxes  at the top of this page with your name, centre number and candidate number. ã   Answer all  questions. ã   Answer the questions in the spaces provided – there may be more space than you need  . Information ã  The total mark for this paper is 50. ã  The marks for each  question are shown in brackets  – use this as a guide as to how much time to spend on each question. ã  You will be assessed on your ability to organise and present information, ideas, descriptions and arguments clearly and logically, including your use of grammar, punctuation and spelling. ã  A Periodic Table is printed on the back cover of this paper. Advice ã   Read each question carefully before you start to answer it. ã  Keep an eye on the time. ã  Try to answer every question. ã  Check your answers if you have time at the end. Pearson Edexcel InternationalAdvanced Level Turn over  2 *P48384A0220*   D ON OT WR I  T E I  NT HI   S A R E A  D ON OT WR I  T E I  NT HI   S A R E A  D ON OT WR I  T E I  NT HI   S A R E A  Answer ALL the questions. Write your answers in the spaces provided.1  (a) A student carried out tests on a solid compound, A , which contains one metal ion and one anion. These tests are described in parts (a)(i) and (a)(ii). Complete the table in each case by stating the inference(s) that would follow each observation made by the student. (i) A flame test was carried out on A . (1) ObservationInferenceLilac flame The formula  of the metal ion in A  is ............................................................................................................  (ii) A sample of A  was heated in a test tube and the gas given off was tested with a glowing splint. (2) ObservationInferences The glowing splint re-lit The gas is ................................................................................  The formula  of A  could be ............................................................................................................  3 *P48384A0320* Turn over     D    O    N    O    T    W    R    I    T    E    I    N    T    H    I    S    A    R    E    A    D    O    N    O    T    W    R    I    T    E    I    N    T    H    I    S    A    R    E    A    D    O    N    O    T    W    R    I    T    E    I    N    T    H    I    S    A    R    E    A  (b) A student carried out tests on an aqueous solution, B . These tests are described in parts (b)(i) and (b)(ii). Complete the table in each case by stating the inferences that would follow each observation made by the student. (i) A spatula measure of sodium hydrogencarbonate was added to a sample of solution B  in a test tube. Any gas evolved was passed through limewater. (2) ObservationInferencesFizzingLimewater turned milky The gas evolved is ............................................................................................................  Therefore solution B  contains ions with the formula ............................................................................................................  (ii) To another sample of solution B  in a test tube, the student added dilute hydrochloric acid followed by aqueous barium chloride solution. (2) ObservationInferencesA white precipitate formed The precipitate is ............................................................................................................ Solution B  is ............................................................................................................  4 *P48384A0420*   D ON OT WR I  T E I  NT HI   S A R E A  D ON OT WR I  T E I  NT HI   S A R E A  D ON OT WR I  T E I  NT HI   S A R E A   (c) A liquid organic compound, W , has the displayed formulaHCCCCHHHHHOHH Complete the table by stating the observations you would expect to make when the tests described are carried out by a student. (6)  TestsObservationsIn a test tube, shake a few drops of W  with bromine water and record the colour changeFrom ............................................................................................ to ..................................................................................................... In a test tube, add a spatula measure of phosphorus(V) chloride to W  Test any gas evolved with damp blue litmus paper ........................................................................................................................................................................................................................ In a test tube, add a mixture of dilute sulfuric acid and aqueous potassium dichromate(VI) to a sample of W  and warm the mixture. Record the colour changeFrom ............................................................................................ to ..................................................................................................... (Total for Question 1 = 13 marks)
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