Question

calculate the ph of a buffer solution that contains 0.25 m benzoic acid (c6h5co2h) and 0.15 m sodium benzoate (c6h5coona). ka of benzoic acid

Answer 1

Step-by-step explanation:

To solve this problem we'll use the Henderson-Hasselbach equation, but first we need the vale for the pKa of Benzoic acid, which is pKa= -log(Ka)=4,19

Now, we apply the equation as follows:

So, the pH of this solution of Sodium Benzoate and Benzoic Acid is 3,97

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