Flashcards in Acids, bases and equilibria Deck (12):
acid def and eq?
substance that donates a proton (needs to contain proton ie H+) (NO ELECTRONS TRANSFERRED THIS AINT REDOX MAN) HA + H2O A- + H3O+
base def and eq?
substance that accepts a proton (needs to have lone pair) B- + H2O BH + OH-
what does strength of acid/base indicate?
the extent to which the substance ionises (fully, partially)
describe the relationship between acid strength, Ka and pKa
strong acid -> ionises fully; Ka will be large, pK will be small.
=[OH-][H3O+]=10^-14 at 25*C
[a-][H3O+]/[HA] INCLUDE UNITS - M
[BH][OH-]/[B-] INCLUDE UNITS - M
describe how a buffer soltion works
-made of weak acid and conj base. (HA, A-)
-if you add an acid it ionises forming H3O+. reacts with A- to form HA and H2O so the pH doesnt change
-add base: ionises to form OH-. reacts with HA to form H2O and A-