2003 Chemistry Higher Finalised Marking Instructions - eduBuzz

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Mark Scheme Worth ½ Worth 0 6. (a) (i) reactants or products could go on fire (flammable) or to prevent burning 1 easier to control the temperature/condensation or safer way to heat (ii) to condense any vapours (or reactants or products which evaporate) 1 (b) H H O H H H H H C C O C C C C C H H H H H H H or O 1 CH3CH2-O-CCH2CH2CH2CH3 Page 10
Mark Scheme Worth ½ Worth 0 (½) 6. (c) 1 mol C2H5OH = 46 g (½) 70 46 g x 130 g 100 (½) 3.6 g 46 3.6 g 70 x 130 x 100 (½) = 7.12 g or (½) 1 mol C2H5OH = 46 g (½) 46 g 130 g 3. 6 3.6 g 130 x = 10.174 g 46 (½) 70 actual yield = 10.174 x 100 (½) = 7.12 g (-½ for wrong or no units) (5) Page 11
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2003 Chemistry Higher Finalised Marking Instructions - eduBuzz

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