Hydrolysis of a salt question

I'm confused about how to find the correct answer to this question: Acetic acid has a pKa of 4.8. What is the pH of a 0.1M solution of sodium acetate? a) 2.9 b) 7 c) 8.9 d) 13 I don't really know where to begin. When I first saw the question, I thought I'd be using the Henderson Hasselbach equation because we are dealing with an acid and it's salt but after reading the answer, they used a whole different approach and did the question by looking at the dissociation of the sodium acetate and... Hydrolysis of a salt question
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