Calculate the pH of a buffer solution that contains 0.20 M CH3COOH and 0.30 M CH3COONa, knowing that for acetic acid KA = 1.8 ∙ 10-5 M at 25 °C. A) 5,64 B) 4,74 C) 5,24 D) 4,92
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Step 1
The equation is as follows: pH = pKa + log ([A-]/[HA]) where: - [A-] is the concentration of the base (in this case, CH3COONa) - [HA] is the concentration of the acid (in this case, CH3COOH) - pKa is the negative logarithm of the acid dissociation constant (Ka) Show more…
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