Chem 241 First Exam Key2011

Chem 241 First Exam Key2011 - ~H+J -::: J K, L<~...

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5. a. (10 points) The amino acid aspartic acid is a triprotic acid, H3A. A 0.20 M solution in 25 mL is prepared from its disodium salt (HA"2). What is the pH of the solution? The pKa values A,,!- ~e 1.990~~;an~ lr~~ f i ~ ~w L3~ \j- Kl. -+ k ~ :.\ U"a J<a ~ 1... , r k' .. '" (O-~' "00 l, L. ~ t l( /11 -4 -.0
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Unformatted text preview: ~H+J -::: J K, L&lt;~ 11 ---n lA.~ ~ q I -(.$ &gt;&lt; I 0 &lt; -, \&quot; -144 I r 0' I-:: \I \ ~ '&quot;.l~2 )( I D -::=-, I 0)&lt;' 0 b. (10 points) What is the.pH ofa 0.1 M solution in 50 mL ofaspartic acid (H3A)? ~~----.-.----~-)~-.~---;.'-W;.-:.&lt;-7~-V~-~-)-~-.1) \ , , (.,) ::,. .~ ;&gt; .' '-t' '+ (I ~ . .t-) &quot;fV t,v , , 4...
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This note was uploaded on 09/20/2011 for the course CHEM 241 taught by Professor Tiani during the Spring '08 term at UNC.

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Chem 241 First Exam Key2011 - ~H+J -::: J K, L&amp;amp;lt;~...

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