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  1. nit

    The difference between accuracy/reliability and validity

    The problem with these terms is that they're not standard terms used by chemists - the more common terms are accuracy and precision as opposed to reliability - ie precision refers to how close the values in your data set are to one another
  2. nit

    A general buffer system

    Yeh, you need to have roughly the same amount of the conjugate/base pair, as the buffering capacity is largely dependent on the ratio acid/base according to henderson-hasselbalch equation which governs the system. If this ratio changes significantly as a result of addition of acid/base, then...
  3. nit

    importance of models - ligands

    Hmmm, we didn't even look at crystal field theory in class...oh well it's easy enough i guess
  4. nit

    Zinc oxide and Cu

    Some other things you could talk about are copper tetraammine and how the concentration of a solution of this may be determined by shining uv at it, since absorbance is directly proportional to concentration...ie uv can be used for quantitative measurements of a copper solution; for infra-red...
  5. nit

    Question regarding UNSW Med interviews

    So do they post the invitations out over the course of the week? If so, does that mean that the top people get told on the first day...ie yesterday? I got told on Monday, and I'm not sure if that's any indication of where we are ranked at this point...
  6. nit

    HELP! How do I write an outstanding personal statement for the Usyd Scholarship?

    It's probably easiest to just stick to the categories listed under no.2 of the application form for the statement, and leave most of the stuff regarding your qualities to your reference from school
  7. nit

    HSC expectations

    I get about 10 entries for myself...random competitions, school, international comps... Oh, and it's not only Ivan...don't forget that Laurie Field is still in the running
  8. nit

    Wir sollen mehr Deutsch reden!

    In den letzten Ferien war ich in Hamburg und unsere Fuehrer hat auch diese Woerter benutzt, aber es war ein bisschen verschieden als das - zB Donaudampfschifffahrstgesellschaftskapitanswitwe oder etwas - vielleicht habe ich ein paar Fehler gemacht...aber im Allgemeinen....
  9. nit

    help

    The general idea is right...it looks a little wonky and asymmetric, that's all
  10. nit

    Fitzpatrick 25 (e)

    Also, use cambridge maths if you can- theres no doubt that it's the best textbook for our maths course...(I reckon that the 3u yr 11 volume is the best textbook written by man:D )
  11. nit

    Fitzpatrick 25 (e)

    Is the answer for 6b: (e^-5k)/4?? For 7: The amount of salt entering the tank per minute is 3 x2 =6 grams per minute Then the amount present at time t is Q(given). So the amount flowing out per minute is q/100 (ie the concentration) x 3 litres/minute (working the units out is really...
  12. nit

    chemistry teachers mistakes

    This wasn't strictly a story about our chem teacher, but we had a substitute one day last year who the school was trying out as she'd applied for a job at our school... She was teaching us about trends for the ionization energies across a period, and glossed over the decrease in IE going from...
  13. nit

    which level of deutsch do you do?

    I used to do german extension, but i dropped it cos I found it quite annoying - it was almost like english all over again, and I just couldn't be bothered to do the work for extension. As for continuers, it's a good subject. My real problem with deutsch is remembering useful phrases...our...
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