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  • 13 May 2024
    Harprit Athwal
    R2.2 (AHL) Activation energy
    Hi Geoff. A quick question here, the ln K1/k2 =.... version of the Arrhenius equation that you have on slide 5 is no longer in the data booklet. I assume that realistically means, students wouldn't be expected to apply that anymore. Is that...
  • 13 May 2024
    Geoffrey Neuss
    R3.1 (AHL) Buffer solutions questions
    Thank you for spotting this Ashley - you are quite right and I've corrected the answer now.
  • 13 May 2024
    Geoffrey Neuss
    R3 (HL) Proton transfer reactions (2)
    Thanks for that Ashley - the answers had got out of order. I've corrected it now.
  • Solution to Question 4 incorrect. Using Kb or Henderson-Hasselbalch equation, the pH after addition of HCl should be 9.301.