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HCN/NaCN 완충용액의 pH

by 영원파란 2015. 6. 17.

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HCN/NaCN 완충용액의 pH

 

 

What is the pH of a buffer solution that is 0.20 M in HCN and 0.12 M in NaCN?

(Ka for HCN is 4.9×10^-10)

 

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pH = pKa + log([A^-] / [HA])

= -log(4.9×10^-10) + log(0.12 / 0.20)

= 9.09

 

 

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