Ionic EquilibriumHard
Question
20 ml, 5 M NaNO2 solution is mixed with 100 ml, 2M HNO2 solution to prepare a buffer solution of pH = 5.7. The Ka of HNO2 is :-
Options
A.10-6
B.10-5
C.4 × 10-6
D.4 × 10-5
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