pH of a weakacid in 0.1 M solution is 4.3. Which statements are correct ?

Options

A. its 0.01 M Solution has `PH gt 4.3`
B. its 0.01 M solution has `pH lt 4.3 `
C. its 0.01 M solution degree of dissociation is less than in 0.1 M solution
D. its 0.01M solution degree of dissociation in less than in 0.1 M solution

Answer

A, C

Explanation

` pH =[(1)/(2) [P^(ka) - log] C]`
` 4.3 =(1)/(2) [P^(ka) -log 10 ^(-1) ] rArrP^(ka) =7.6`
` pH =(1)/(2) [7.6 -log 10 ^(-2) ]rArr pH=4.8`
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