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I (2 points) Calculate the for the following conditions pH 3.21 b poH 13.34 2. (4 points) Calculate the pH of the following solutions: 3. (2 points) Calculate the pH ofthe following buffer a and (4 points) Abuffer is made from and a. What is the pH? b. If you added moles of to 0.100 L of buffer what is the final pH. (assume that any change in volume is negligible.) s (2 points) Write out the full ionization equations for the following amino acids. (Hint: use the last page of the pH review to help with the order of ionizations and start at neutral pH) Alanine b. Serine 6 (2 points) How many grams of phenylalanine are needed to make 350.0 mL of a 0.125M solution? .(4 points) You titrate valine as we did in class today; dissolved it, acidified the solution with an excess of HCl, then titrated with NaoH until a pH of 13.5 was reached. Use the following information to determine; The molecular weight of valine b. Calculate the pl Mass of Valine: 0.203g Molarity of NaOH 0.165M Volume at equivalence point l: pKal Not seen clearly Volume at equivalence point 2: P. I8.39 ml. Volume at equivalence point 3: pKa2 2891 ml pKa I 2.27 (estimated) pKa 2
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Question 1 To 4 Have incomplete information that is you are not written what to do.

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