Edexcel Jun 2017 (IAL) Paper 3 Q1 (with explained solutions) |

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Edexcel Jun 2017 (IAL) Paper 3 Q1

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Answer ALL the questions. Write your answers in the spaces provided. (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) Observation Inference Lilac 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)Observation Inferences The glowing splint re-lit The gas isThe formula of A could be*P48384A0220*<br />
(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) Observation Inferences Fizzing Limewater turned milky The gas evolved isTherefore 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) Observation A white precipitate formed Inferences The precipitate isSolution B is*P48384A0320* Turn over<br />
(c) A liquid organic compound, W, has the displayed formula H H H C C C C H Complete the table by stating the observations you would expect to make when the tests described are carried out by a student. (6) Tests Observations In a test tube, shake a few drops of W with bromine water and record the colour change 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 change FromtoFromto(Total for Question 1 = 13 marks) *P48384A0420*<br />
BLANK PAGE *P48384A0520* Turn over<br />

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Question Number 1(a)(i) Question Number 1(a)(ii) Question Number 1(b)(i) Question Number 1(b)(ii) Mark (1) Mark (2) Acceptable Answers K+/K+1/K1+ IGNORE potassium (ion) Reject Just K Acceptable Answers Reject (1) K2O/KO Oxygen / O2 KNO3 IGNORE Name/potassium nitrate ALLOW KClO3 / KMnO4 / KO2 / K2O2 ALLOW TE on cation identified in (a)(i) (1) Mark independently Acceptable Answers Carbon dioxide / CO2 Reject Mark (2) (1) H+ / H3O+ (1) IGNORE hydrogen Just H, just H3O CO3 H+ / H3O+ with any anions 2- Acceptable Answers Reject If name and formula are given both must be correct Barium sulfate / BaSO4 (1) Sulfuric acid / H2SO4 (1) ALLOW NaHSO4 / KHSO4 Mark (2)<br />
Mark (6) Question Number 1(c) Acceptable Answers Reject (1) Just red Just clear White solid / white smoke Pink / bleached (With bromine water) (From) yellow / orange / brown / red- brown (To) colourless / decolourised (With PCl5) Steamy fumes / white fumes / misty fumes (1) (1) IGNORE HCl is formed (Blue litmus paper turns) red (Solution turns from) orange To green ALLOW blue (1) (1) (1) Mark all 6 points independently (Total for Question 1 = 13 marks)<br />

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