Things to remeber for exams - specific cases
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Why does the base-mediated esterification of carbox. acids NOT work
• the carboxylic acid is simply deprotonated and is then left, it is more stable as that anion
what is a nice thing to include when thinking about the relative energies of AB and B MOs and stabilities wrt dissociation
draw the energy - bond length diagram the LJ potential thing and draw the overall lines to show whether there is a minimum at a finite bond length or as bond length tends to infinity
what should we do and NOT do when asked to plot a graph using eq. const. k to find deltarH” and deltarS” for a reaction
• DON’T go directly from deltarG” = -RTln(K), this requires making certain assumptions • use the van’t hoff eq. of dln(k)/dt = deltarH” / RT^2 so ln(k) on Y against 1/T gives grad -deltarH”/R • to find deltarS” find deltarG” at a certain temp using -RTln(k) and use deltarH” at the same temp
what should we watch for when doing conc’s or rate equations
UNITS especially when it’s wanted in moelcules s^-1 or similar