A buffer based on 1.0 m hf and 1.0 m naf will be more acidic than a buffer based on 1.0 m acetic acid and 1.0 m sodium acetate. (ka hf = 7.2 x 10-4, ka acetic acid = 1.8 x 10-5)
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Explanation:
To calculate the specific pH of a given buffer, you need to use the Henderson-Hasselbalch equation for acidic buffers: "pH = pKa + log10([A-]/[HA])," where Ka is the "dissociation constant" for the weak acid, [A-] is the concentration of conjugate base and [HA] is the concentration of the weak acid. For basic (a.k.a.
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