PMT For Examiner’s Use Centre Number Candidate Number Surname Other Names Examiner’s Initials Candidate Signature Question Mark General Certificate of Secondary Education 1 Higher Tier 2 June 2013 3 Chemistry CH3HP 4 H Unit Chemistry C3 5 6 Written Paper 7 Monday 20 May 2013 1.30 pm to 2.30 pm TOTAL For this paper you must have:  a ruler  the Chemistry Data Sheet (enclosed). You may use a calculator. Time allowed 1 hour  Instructions Use black ink or black ball-point pen.  Fill in the boxes at the top of this page.  Answer all questions.  You must answer the questions in the spaces provided. Do not write  outside the box around each page or on blank pages. Do all rough work in this book. Cross through any work you do not want  to be marked. Information The marks for questions are shown in brackets.  The maximum mark for this paper is 60.  You are expected to use a calculator where appropriate.  You are reminded of the need for good English and clear presentation in  your answers. Question 3 should be answered in continuous prose.  In this question you will be marked on your ability to: – use good English – organise information clearly – use specialist vocabulary where appropriate. Advice In all calculations, show clearly how you work out your answer.  (Jun13CH3HP01) CH3HP G/K93725 6/6/6/6/6 PMT 2 Do not write outside the box There are no questions printed on this page DO NOT WRITE ON THIS PAGE ANSWER IN THE SPACES PROVIDED (02) G/K93725/Jun13/CH3HP PMT 3 Do not write outside the box Answer all questions in the spaces provided. 1 Lithium is in Group 1 of the periodic table. Lithium reacts with water to produce a gas and an alkaline solution. Bubbles of gas Lithium Water 1 (a) (i) Name the gas produced. ............................................................................................................................................ (1 mark) 1 (a) (ii) Which ion causes the solution to be alkaline? ............................................................................................................................................ (1 mark) 1 (b) Potassium is also in Group 1 of the periodic table. Potassium reacts with water in a similar way to lithium. Write down two differences you would see between the reactions of potassium and lithium with water. 1 ......................................................................................................................................... ............................................................................................................................................ 2 ......................................................................................................................................... ............................................................................................................................................ (2 marks) ____ 4 Turn over for the next question Turn over  (03) G/K93725/Jun13/CH3HP PMT 4 Do not write outside the box 2 This question is about organic compounds. 2 (a) Wine contains ethanol (CH CH OH). 3 2 2 (a) (i) Complete the displayed structure of ethanol. H H C H (1 mark) 2 (a) (ii) Wine left in a glass for several days turns sour. The sour taste is caused by ethanoic acid. Complete the sentences. The ethanoic acid is produced from a reaction between ethanol and ................................................... . This type of reaction is ................................................... . (2 marks) (04) G/K93725/Jun13/CH3HP PMT 5 Do not write outside the box 2 (b) Propyl ethanoate, a fragrance, can be produced by reacting ethanoic acid with an alcohol. Propyl ethanoate is a member of a series of organic compounds. The members of the series all have the same functional group. The displayed structure of propyl ethanoate is: H O H H H H C C O C C C H H H H H 2 (b) (i) Draw a ring around the functional group for this series on the displayed structure of propyl ethanoate. (1 mark) 2 (b) (ii) Name the series of organic compounds with this functional group. ............................................................................................................................................ (1 mark) 2 (b) (iii) The alcohol used to make propyl ethanoate has the formula CH CH CH OH 3 2 2 Name this alcohol. ............................................................................................................................................ (1 mark) ____ 6 Turn over for the next question Turn over  (05) G/K93725/Jun13/CH3HP PMT 6 Do not write outside the box 3 In this question you will be assessed on using good English, organising information clearly and using specialist terms where appropriate. A student used the equipment shown to do a titration. White tile Indicator Burette Sodium Conical flask hydroxide Acid Pipette Pipette filler Describe how a student should use this equipment to find the volume of sodium hydroxide solution that reacts with a known volume of acid. Include any measurements the student should make. Do not describe how to do any calculations. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (06) G/K93725/Jun13/CH3HP PMT 7 Do not write outside the box ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ____ (6 marks) 6 Turn over  (07) G/K93725/Jun13/CH3HP PMT 8 Do not write outside the box 4 (a) A campsite has a spring, where hard water flows out of limestone rock. Limestone rock Spring Campsite A student compared the hardness of the spring water with two other samples of water. The student measured 20 cm3 of water into a boiling tube. The student then: added a drop of soap solution  shook the boiling tube for 10 seconds  looked to see if a permanent lather had formed.  The student repeated the procedure until a permanent lather formed. The results are shown in the table. Number of drops of soap solution needed to form a permanent lather Water sample Test 1 Test 2 Test 3 Mean Spring water (from the campsite) 13 11 6 Tap water 7 5 6 6 Distilled water 1 1 1 1 (08) G/K93725/Jun13/CH3HP PMT 9 Do not write outside the box 4 (a) (i) Calculate the correct mean for spring water. ............................................................................................................................................ ............................................................................................................................................ Mean = .......................... drops (2 marks) 4 (a) (ii) What conclusion could the student make from her results? Use the results in the table to give a reason for your answer. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (2 marks) 4 (a) (iii) Another student at the campsite boils some of the hard spring water in a pan. The inside of the pan becomes coated with a white solid. Explain how the white solid is produced. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (3 marks) Question 4 continues on the next page Turn over  (09) G/K93725/Jun13/CH3HP PMT 10 Do not write outside the box 4 (b) Ion exchange columns can be used to soften hard water. Hard water Resin containing sodium ions Soft water 4 (b) (i) Describe how an ion exchange column softens water. ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ ............................................................................................................................................ (3 marks) (10) G/K93725/Jun13/CH3HP