CHM 104 1st Edition Lecture 19 Outline of Last Lecture I Aqueous Ionic Equilibria II pH Buffered Solutions III Henderson Hassselbach Equation IV How to make a buffer Outline of Current Lecture V pH of Buffer Current Lecture Quantifying what happens when SA or SB are added to the buffer Calculate pH pH after 2 0 mL of 0 50 M HCl pH after 2 0 ml of 0 50 M NaOH pH of Buffer Ka 1 0 x 10 6 pKa 6 00 A 0 050 M HA 0 100 M These notes represent a detailed interpretation of the professor s lecture GradeBuddy is best used as a supplement to your own notes not as a substitute Summary of Buffers Contains HA and A at a ratio between 1 10 and 10 1 pH of buffer will be 1 from pKa of HA Will work best if absolute amounts are LARGE compared to anticipated SA or SB additions
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