CHEM 14B Lecture Notes - Lecture 24: Acid Dissociation Constant, Ph, Weak Base
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T acid d pka d ph t acid basicity. At pkb 10g kb poh logcott pka tpkb pkw 14 acids have conjugate bases pkb pka bases have conjugate acids oaii strongacids ph. 15. 7 calculating ph and % ionization of a weak acid solution (lo-5) X i 1. 2 10 3 positive ph log hyo log 1. 2 10 3. You"ve isolated a substance that you suspect is either lactic acid (pka = 3. 86) or pyruvic acid (pka = 2. 50). You nd that the ph of a 0. 010 m aqueous solution of the substance is 2. 95. 0. 0011 log ka pka kb wttfa. tt log 1. 4 10 4. 2. calculate bu er ph and how it changes in response to addition of acid or base. 16. 2 mechanism of bu er action (lo-1) a bu er solution maintains approximately constant ph upon small additions of acid or base typically a bu er solution contains a weak acid and its conjugate weak base in approximately equal concentrations.
