JEE Main 2026 — Ionic Equilibrium Question with Solution
JEE Main 2026 (21 January Shift 2)
Question
The first and second ionization constants of are and respectively. The concentration of in solution is . (Nearest Integer)
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Show full solutionCorrect answer: 100
Correct answer
100
Step-by-step explanation
For a weak diprotic acid , the ionization steps are:
with
with
Since , the concentration of is primarily determined by the first ionization.
Also, from the first ionization,
For the second ionization:
Substituting the values:
Thus,
To express this in the form :
The value is 100.
with
with
Since , the concentration of is primarily determined by the first ionization.
Also, from the first ionization,
For the second ionization:
Substituting the values:
Thus,
To express this in the form :
The value is 100.
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