MEDIUMMCQ SINGLEJEE Advanced ChemistryPhysical ChemistryIonic equilibriumPrevious Year Questions
Accumulation of lactic acid (HC3H5O3), a monobasic acid in tissues leads to pain and a feeling of fatigue. In a 0.10 M aqueous solution, lactic acid is 3.7% dissociated. The value of dissociation constant, Ka, for this acid will be (NEET 2013)
A.1.4 x 105
B.1.4 x 104✓ Correct
C.3.7 x 104
D.2.8 x 104
Explanation
Degree of dissociation, 3.7 0.037 100 According to Ostwald’s formula, 2 2 4 4 a K 0.037 0.10 1.369 10 1.4 10 C x x x
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