Posted by justin on Sunday, December 5, 2010 at 3:22pm.
Use the Henderson-Hasselbalch equation.
First find moles acetic acid. M x L = moles.
.......CH3COOH + OH^- ==>CH3COONa + H2O
start...moles.... 0.......0
change..-x........+x........+x
final..moles-x.....0......0+x
Then substitute into the HH equation and solve for x. After, I always like to check it by calculating the moles acetate and moles acetic acid remaining, plug into the HH equation and see if it gives the correct pH.
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