The concentration of hydroxide ion is 5 [tex]\times[/tex] 10^
−
14 M.
Explanation:
Consider the equilibrium of this acid's dissociation,
H
C
l
O
4 ⇌ H
+ + C
l
O 4
-
Moreover, let's assume that H
C
l
O
4 is a strong acid and will fully dissociate.
Hence,
[
H
+
] = 0.20 M
Now, recall,
K
w = [
H
+
]
[
O
H
−
] = 1.0 [tex]\times[/tex] 10
^−
14
Hence,
⇒
[
O
H
−
] = K
w / [
H
+
] = 5 [tex]\times[/tex] 10^
−
14 M.
