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lawyer [7]
3 years ago
14

What is the ph of the benzoic acid solution prior to adding sodium benzoate?

Chemistry
1 answer:
Reika [66]3 years ago
7 0
The acid dissociation constant of benzoic acid is 6.5 x 10^-5. Therefore, the pH of the benzoic acid solution prior to adding sodium benzoate is:

pH = -log[Ka]
pH = -log (6.5 x 10^-5)
pH = 4.19

The pH of the benzoic acid solution is 4.19 which is acidic, but a weak acid. 

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