Calculate the pH of 0.305 L of a 0.17 M acetic acid - 0.28 M sodium...

Calculate the pH of 0.305 L of a 0.17 M acetic acid - 0.28 M sodium acetate buffer before (pH1) and after (pH2) the addition of 0.0062 mol of HBr. Assume that the volume remains constant. (Ka of acetic acid is 1.8⋅10−5)

Express your answers using three significant figures separated by commas.

Expert Solution

The pH of acidic buffer solution is given by the Henderson Hassselbalch equation

Therefore, pH1 = 4.96, pH2 = 4.88 (in three significant figures).

queen_honey_blossom answered 2 years ago

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