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12. Calculate the pH of a buffer solution made from 0.30 M hydrofluoric acid and 0.70...

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Chemistry

12. Calculate the pH of a buffer solution made from 0.30 Mhydrofluoric acid and 0.70 M sodium fluoride after the addition of0.08 mol of NaOH to 1.0 L of this solution.  Assume nochange in volume.  The Ka for HF is 3.5 • 10-4.

Can someone guide me through this question? The answer is belowbut I can figure out how they got this answer.

Answer: pH = 4.01

Answer & Explanation Solved by verified expert
4.5 Ratings (950 Votes)
Consider the dissociation of hydrofluoric acid HF as below HF aq H aq F aq Ka HFHF 35104 pKa log Ka log 35104 345593 I will keep a few guard digits extra Consider the    See Answer
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