Concept explainers
Interpretation:
In 0.050 M solution of a weak acid, [H+] = 1.8 × 10-3.
Concept introduction:
An equilibrium constant
For the general acid HA,
The relative strength of an acid and base in water can be also expressed quantitatively with an equilibrium constant as follows:
An equilibrium constant
Explanation of Solution
Given,
In 0.050 M solution of a weak acid, [H+] = 1.8 × 10-3.
Reason for the correct option.
ICE table:
Initial concentration | 0.15 M | - | 0 | 0 |
Change | -x | + x | + x | |
At equilibrium | 0.15 - x | x | x |
The initial concentration is
According to the calculation option (c) is correct answer.
Reason for the incorrect option:
According to the equilibrium constant calculation, the rest of the options (a), (b) and (d) are wrong answer.
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