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Home Q & A Board Science-Related Homework Help Chemistry (Moderator: Laser_3)
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nveck777 nveck777
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11 years ago
The ionization constant of HF is 7.2 × 10?4.
What is the molar concentration of H+ in a
solution which is 0.112 molar in HF and 0.22
molar in KF?
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#1
11 years ago
Ka = - log 7.2 x 10^-4 = 3.14

pH = pKa + log [F-]/ [HF]

pH = 3.14 + log 0.22 / 0.112 = 3.43

[H+]= 10^-3.43 = 3.69 x 10^-4 M
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