2006(2) - Pf'J THE UNIVERSITY OF NEW SOUTH WALES NOVEMBER...

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THE UNIVERSITY OF NEW SOUTH WALES NOVEMBER 2006 CEIC2012 Instrumental Analysis Practical TIME ALLOWED: 2 hours TOTAL NUMBER OF QUESTIONS: 8 ANSWER ALL QUESTIONS. ALL QUESTIONS ARE OF EQUAL VALUE. THIS PAPER MAY BE RETAINED BY THE CANDIDATE. MATERIALS PERMITTED TO BE BROUGHT INTO THE EXAM ROOM BY THE CANDIDATE: WRITING AND DRAWING INSTRUMENTS ONLY. CANDIDATES MAY NOT BRING THEIR OWN CALCULATORS. ALL ANSWERS MUST BE WRITTEN IN INK. EXCEPT WHERE THEY ARE EXPRESSLY REQUIRED, PENCILS MAYBE USED ONLY FOR DRAWING, SKETCHING AND GRAPHICAL WORK. Pf'J
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Question 1 (a) What is the pH of the solution that results from dissolving 6.005 g of acetic acid and 8.203 g of sodium acetate in water and diluting the mixture to 500 mL? (See data at end of examination paper) (b) Explain the difference between precision and accuracy. In the case of a volumetric analysis, give an example of how results might be precise but not accurate. Question
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2006(2) - Pf'J THE UNIVERSITY OF NEW SOUTH WALES NOVEMBER...

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