8. Predict whether the salt
NaHCO
3
will form an acidic or basic solution given
K
a
(H
2
CO
3
) = 4.3 x 10
-7
and
K
a
(HCO
3
-
) = 5.6 x 10
-11
.
Dissociation equation:
NaHCO
3
(aq)
Na
+
(aq) + HCO
3
-
(aq)
Which are the correct pair of dissociation equilibrium reactions for
HCO
3
-
(aq)
?
a)
HCO
3
-
(aq) + H
+
(aq)
H
2
CO
3
(aq)
HCO
3
-
(aq) + OH
-
(aq)
H
2
CO
4
2-
(aq)
b)
HCO
3
-
(aq) + H
2
O (l)
H
3
CO
4
-
(aq)
HCO
3
-
(aq) + H
2
O (l)
CO
3
2-
(aq) + H
3
O
+
(aq)
c)
HCO
3
-
(aq)
OH
-
(aq) + CO
2
(g)
HCO
3
-
(aq) + H
2
O (l)
H
2
CO
3
(aq) + OH
-
(aq)
d)
HCO
3
-
(aq)
H
+
(aq) + CO
3
2-
(aq)
HCO
3
-
(aq) + H
2
O (l)
H
2
CO
3
(aq) + OH
-
(aq)
