23.
For a 1.0 M oxalic acid solution:
H
2
C
2
O
4
(aq)
HC
2
O
4
-
(aq) + H
+
(aq)
K
a
= [ H
+
][ HC
2
O
4
-
] / [
H
2
C
2
O
4
]
K
a
= 6.4 x 10
-5
at 25
o
C
At equilibrium, which of the species will be present in the greatest concentration?
i) H
+
ii) HC
2
O
4
-
iii)
H
2
C
2
O
4
a) i) only
b) ii) only
c) iii) only
d) i) and ii) only
