What is the pH of a buffer solution that is 0.400 M in HF and 0.790...

Question

Question

What is the pH of a buffer solution that is 0.400 M in HF and 0.790 M in NaF? Ka of HF = 7.2 ✕ 10-4.

science chemistry

Answer 1

Answer #1

PH = PKa + log[NaF]/[HF]

Ka = 7.2*10^-4

PKa = -logKa

= -log7.2*10^-4

= 3.1426

PH = 3.1426 + log0.79/0.4

= 3.1426 + 0.2955 = 3.4381 >>>>> answer

Answer 2

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