AQA-CH2HP-QP-JUN14-CR - Centre Number For Examiners Use...

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CH2HP G/KL/101857/Jun14/E4 (Jun14CH2HP01) General Certificate of Secondary Education Higher Tier June 2014 Additional Science CH2HP Unit Chemistry C2 Chemistry Unit Chemistry C2 Thursday 15 May 2014 9.00 am to 10.00 am 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 2 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. Centre Number Candidate Number Surname Other Names Candidate Signature For Examiner’s Use Examiner’s Initials Question Mark 1 2 3 4 5 6 7 TOTAL H A
2 Do not write outside the box (02) G/Jun14/CH2HP Answer all questions in the spaces provided. 1 The label shows the ingredients in a drink called Cola. Cola Ingredients: Carbonated water Sugar Colouring Phosphoric acid Flavouring Caffeine 1 (a) (i) The pH of carbonated water is 4.5. The pH of Cola is 2.9. Name the ingredient on the label that lowers the pH of Cola to 2.9. [1 mark] ............................................................................................................................................ 1 (a) (ii) Which ion causes the pH to be 2.9? [1 mark] ............................................................................................................................................
3 Do not write outside the box

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