HW%20_3%20answers - Homework #3 Due Wednesday, November 2...

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Due Wednesday, November 2 Name_____ Answer Key __________________ 1. (6 points) Define: a. Arrhenius Acid and Arrhenius Base All acids have a H in the formula and release H + in solution. All bases have a OH in the formula and release OH - in solution. b. Bronsted-Lowry Acid and Bronsted-Lowry Base All acids donate a H + in solution. All bases accept a H + in solution. c. Lewis Acid and Lewis Base All acids are electron-deficient and accept an electron pair. All bases are electron-rich and donate an electron pair. 2. (5 points) Classify each as a strong or weak acid OR a strong or weak base. a) H 3 BO 3 b) HI c) H 2 S d) HO 2 C 2 O 2 H e) NH 4 + f) Br - g) ClO - h)CH 3 COO - i)PO 4 3- j)HSO 3- a) Weak acid (Ka = 10 -10 ) b) Strong acid (Ka = 10 9 ) c) Weak acid (Ka = 10 -7 ) d) Weak acid (Ka = 10 -2 ) e) Weak acid (Ka = 10 -10 ) f) Weak base (Kb = 10 -23 ) g) Weak base (Kb = 10 -7 ) h) Weak base (Kb = 10 -10 ) i) Weak base (Kb = 10 -2 ) j) Weak base (Kb = 10 -13 ) 3. (6 points) What is the pH and pOH of a solution of 0.36 M HCl, 0.62 M NaOH, and 0.15 M HNO 3 ? All acids and base are strong and will dissociate completely in solution. Total moles of acid = 0.36 moles + 0.15 moles = 0.51 moles H 3 O + Total moles of base = 0.62 moles OH- 0.62 moles OH - - 0.51 moles H
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This note was uploaded on 11/08/2011 for the course CHEMISTRY 4564D-E taught by Professor Smith during the Spring '10 term at Fort Valley State University .

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HW%20_3%20answers - Homework #3 Due Wednesday, November 2...

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