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a
3
b
11
c
Between 3 and 7
d
7
answer is C.
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Detailed Solution
pH of a weak acid solution is given by pH=12pKa-logCopKa value is not given so using the above relation we cannot determine the pH.We know, acetic acid (CH3COOH) is a weak acid and so its PH should vary between 3-7 strong acids have a pH below 3.