Posted: March 24th, 2017
Rules: You may use the following materials: (1) your textbook; (2) your class notes; and (3) any downloaded items from the course website. Please do your own work, no collaborating. Work the problems on the exam sheet and show all of your work. Please hand in both your answers and the exam sheet. Good luck! Due: No later than 1 pm Friday, September 13, 2013. Slide your exam under the door of Prof. Buratto’s office (4148B Chemistry) or hand it to Prof. Buratto himself. 3. (20 pts.) Calculate the pZn of a solution prepared by mixing 25.0 mL of 0.0100 M EDTA with 50.0 mL of 0.00500 M Zn2+. Assume that both the Zn2+ and EDTA solutions are buffered with 0.100 M NH3 and 0.176 M NH4Cl. 4. (15 pts.) Calculate the pH resulting from mixing 15.00 mL of 0.800 M HIO3 (pKa = 0.77) with 45.00 mL of 0.0200 M NaOH. 6. (15 pts.) Consider the electrochemical cell described below.
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