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Chemical Kinetics (Past Papers)

p.01. Chemical Kinetics (Past Papers). C. Y. Yeung (CHW, 2009). (b) Plot ln[H 2 O 2 ] against t to obtain a straight line. for first order reaction, slope = -k. p.02. p. 77 Q.3 (1995 --- Chemical Method).

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Chemical Kinetics (Past Papers)

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  1. p.01 Chemical Kinetics (Past Papers) C. Y. Yeung (CHW, 2009)

  2. (b) Plot ln[H2O2] against t to obtain a straight line. for first order reaction, slope = -k p.02 p. 77 Q.3 (1995 --- Chemical Method) (a) Withdraw a known volume of the reaction mixture and add to excess dilute H2SO4, titrate against standard MnO4-.

  3. p.03 p. 77 Q.2 (1995 --- Differential Rate Eqn) (a) I2 : Use B, C : rate independent of [I2] CH3COCH3: Use B, D : rate  [CH3COCH3] H+ : Use B, E : rate  [H+]  Rate = k [CH3COCH3] [H+] (b) Total volume = 100cm3 Use B: [CH3COCH3] = (100.789/58)/(100/1000) = 1.36M 4.9610-6 = k (1.36) (0.1) k = 3.65  10-5 M-1s-1

  4. p.04 p. 77 Q.5 (1996 --- Integrated Rate Eqn)  The reaction is first order. k = -slope = 210-3 min-1

  5. p. 80 Q.13 (2002 --- Integrated Rate Eqn) p.05 Note: Vol. of gas at time t = Vt  [product] Vol. of gas not formed yet = (Vtotal-Vt)  [reactant] A straight line plot indicates that the reaction is first order w.r.t. C6H5N2+Cl-. k = -slope = 0.073 s-1

  6. p. 77 Q.1 (1994 --- Integrated Rate Eqn) p.06 k = slope = 0.02 M-1 s-1

  7. p.07 Assignment p.77 Q.6(a)-(c), Q.8, Q.9(a)-(b), Q.10, Q.11(a),(b), Q.12, Q.14(b)-(d) [due date: 24/2(Tue)] Next …. Activation Energy and Arrhenius Equation (p. 49-53)

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