If you are given sodium acetate and asked to make a 0.15 M acetate buffer and...
If you are given sodium acetate and asked to make a 0.15 M acetate buffer and titrate it to a final pH of 3.7, will you have to add acid, base, or nothing in order to achieve the proper pH? Why?
Homework Answers
Answer:
Buffer is the combination of a weak acid and its salt with strong base or combination a weak base and its salt with strong acid.
Acetate buffer is the combination of a weak acid CH3COOH and conjucate base CH3COO- (from salt)
Now you are furnished with CH3COO- ( from sodium acetate) and you need to produce CH3COOH, for this purpose CH3COO- react with an strong acid.
CH3COOH + H+ - > CH3COOH
Hence you need to add acid to prepare 0.15 acetate buffer with pH 3.7.
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