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A buffer consists of 0.91-M propanoic acid ( Ka= 1.4 × 10-5) and 0.76-M sodium propanoate. a)...

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Chemistry

A buffer consists of 0.91-M propanoic acid ( Ka= 1.4 ×10-5) and 0.76-M sodium propanoate.

a) Calculate the pH of this buffer.

b)Calculate the pH after the addition of 1.2 mL of 0.10–M HCl to0.010 L of the buffer.

c) Calculate the pH after the addition of 1.8 mL of 1.0–M HCl to0.010 L of the buffer.

Answer & Explanation Solved by verified expert
3.6 Ratings (641 Votes)
a Calculate the pH of this buffer Initial concentrations Buffer of Propanoic acidAH and its conjugate base A in salt sodium propanoate NaA AH A H Concentration of sodium propanoate A 076 M concentration of propanoic acid AH 091 M pKa Logka Log14E5 485 From HendersonHasselbach equation for the buffer of acid AH and base A pH pKa LogBaseAcid pH pKa LogAAH    See Answer
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