Published by:
CGP EDU Academic Team
Published on: August 14, 2026
In an aqueous solution, the ionization constants for carbonic acid are
K 1 = 4.2 x 10 -7 and K 2 = 4.8 x 10 -11
Select the correct statement for a saturated 0.034 M solution of the carbonic acid:
A
The concentration of H + is double that of 
.
.
B
The concentration of 
is 0.034 M.
is 0.034 M.
C
The concentration of 
is greater than that of 
.
is greater than that of .
D
The concentration of H + and 
are approximately equal.
are approximately equal.
Text Solution
Verified by ExpertsThe correct answer is:
D
The concentration of H + and 
are approximately equal.
, so H 2 CO 3 ionizes more than 
and hence, contribution of H + is mostly due to ionization of carbonic acid. Thus, the concentrations of H + and 
are approximately equal.
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