A set of buffer solutions was prepared

CHEMISTRY · Subjective · A Level · Chemistry · Acids and bases · Acids and bases

Problem

A set of buffer solutions was prepared, and a plot of pH versus log⁡([A−]/[HA])\log([A^-]/[HA]) yielded the best-fit line pH=0.99x+4.62\text{pH} = 0.99x+4.62 (R2=0.997R^2 = 0.997), where x represents log⁡([A−]/[HA])\log([A^-]/[HA]). Based on this equation, determine the pKa of the weak acid.

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