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pH of strong base & weak acid

Ice-cream
in Homework Help

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25ml 0.2 NaOH solution is added to 50ml of 0.1M acetic acid solution. What is the pH of the solution (Ka for acetic acid = 1.75e-5).

 

i got an answer of pH = 9.378. does any1 agree? (my working out is so long that I thought if quite a few ppl agree with my ans. then i must be using the correct method...otherwise, if any of u guys reckon i've got the wrong ans, plz tell me so that i can figure out if my method is wrong)

 

thanx

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