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14. The mass spectrum of a ketone is given below: Y 100 90 х 2 Relative abundance/% For 0 10 20 30 70 80 90 100 40 50 60
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14. The mass spectrum of a ketone is given below: Y 100 90 х 2 Relative abundance/% For 0 10 20 30 70 80 90 100 40 50 60
14. The mass spectrum of a ketone is given below: Y 100 90 х 2 Relative abundance/% For 0 10 20 30 70 80 90 100 40 50 60 m/z a) Suggest formulas for the fragment ions labelled X and Y. [2 marks] b) Draw the structure of the ketone. [1 mark] 15. The ester ethyl ethanoate, CH3COOC2H5, is hydrolysed with HCl by heating to 100 °C. The reaction is first order with respect to both reagents. a) Write the rate equation for this reaction. [1 mark] b) When the initial concentration of HCl is 2.0 mol L'', and the ester is 0.25 mol L'', the initial rate is 2.2 x 103 mol List. Calculate a value for the rate constant at 100 °C. [2 marks]
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