MEDIUMMCQ SINGLEIChO (Chemistry Olympiad)Physical ChemistryIonic equilibriumDissociation of Weak Acids and Bases
The a K of an acid is 3.2 10 x . The degree of dissociation of the acid at concentration of 0.2M is (a) 6.0 10 x (b) –2 1.26 10 x (c) –4 x (d) 0.04 10 x
Answer
B
Explanation
We know that for weak acids Ostwald dilution law is as follows- 2 a 5 1 a 2 K Cα α K / C 3.2 10 / 2 10 α 1.26 10 x x x Ostwald's Dilution Law
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