Question

Determine the acid dissociation constant for a 0.010 M nitrous acid solution that has a pH of 2.70. Nitrous acid is a weak monoprotic acid and the equilibrium equation of interest is
HNO2(aq) + H2O(l) H3O+(aq) + NO2-(aq).
A) 8.0 10-3
B) 2.0 10-3
C) 5.0 10-4
D) 4.0 10-4

Answer

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