Topic 12: Acid-base equilibria Flashcards
1
Q
an acid is
A
a proton donor
2
Q
a base is
A
a proton acceptor
3
Q
a conjugate acid-base pair consists of
A
either a base and its conjugate acid or an acid and its conjugate base
4
Q
a conjugate acid is
A
what is formed when a base accepts a proton
5
Q
a conjugate base is
A
he species formed when an acid donates a proton
6
Q
an amphoteric substance is one that
A
can act both as an acid and as a base
7
Q
the pH of an aqueous solution is defined as
A
the reciprocal of the logarithm to the base 10 of the hydrogen ion concentration measured in moles per cubic decimeter, pH = -lg [H+].
8
Q
pKa =
A
pKa = -lg Ka
9
Q
Kw=
A
Kw = [H+(aq)][OH-(aq)]
10
Q
a buffer solution is
A
a solution that minimises the change in pH when a small amount of either acid or base is added
