12 - acid-base equilibria

Question 1

proton donor

Answer 1

an acid

Question 2

proton acceptor

Answer 2

a base

Question 3

conjugate acid-base pair

Answer 3

consists of either a base and its conjugate acid or an acid and its conjugate base

Question 4

conjugate acid

Answer 4

when a base accepts a proton, the species formed is the conjugate acid of the base

Question 5

conjugate base

Answer 5

when an acid donates a proton, the species formed is the conjugate base of the acid

Question 6

amphoteric substance

Answer 6

one that can act both as an acid and as a base

Question 7

pH

Answer 7

of an aqueous solution is defined as the reciprocal of the logarithm to the base 10 if the hydrogen ion concentration measured in moles per cubic decimetere, pH = -Ig [H+].
(can just learn equations instead)

Question 8

pKa =

Answer 8

-Ig Ka

Question 9

Kw =

Answer 9

[H+(aq)][OH-(aq)]

Question 10

buffer solution

Answer 10

a solution that minimises the change in pH when a small amount of either acid or base is added