MEDIUMMCQ SINGLEJEE Mains ChemistryPhysical ChemistryIonic equilibriumPrevious Year Questions
A weak acid, HA, has a K of 1.00 × 10–5. If 0.100 mole of this acid is dissolved in 1L of water, the percentage of acid dissociated at equilibrium is closest to (CBSE AIPMT 2007)
A.99.0%
B.1.00%✓ Correct
C.99.9%
D.0.100%
Explanation
We know that for weak acids Ostwald dilution law is as follows- 2 a 5 1 a 4 2 K = Cα α = K /C 1 10 /10 α 10 10 1.00% x