As the initial concentration of a weak acid decreases, the
percent dissociation of the acid increases!
In the prior problem: for 0.10 M HPr, 1.1% dissociation
for 0.010 M HPr, 3.6% dissociation
Rationale: larger solution volume accommodates more ions
(analogous to pressure effects on gas equilibria when ēngas is non-zero)
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