Chemistry 103B Exam 2 answer key

Chemistry 103B Exam - Chemistry 103B Exam 2 Answer Key Form A 1(2 What is[H3O for a solution that has pOH = 5.640(a 8.360 M(b 2.34e-4 M(c 2.29e-6

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Chemistry 103B Exam 2 Answer Key Form A 1. (2) What is [H 3 O + ] for a solution that has pOH = 5.640? (a) 8.360 M (b) 2.34e-4 M (c) 2.29e-6 M (d) 4.37e-9 M (e) 4.27e-11 M Definitions of pOH and pH. The next five questions involve a strong acid HClO 3 (aq). 2. (2) What is the pH of a 0.20 mol/L solution of HClO 3 ? (a) 0.30 (b) 0.70 (c) -0.20 (d) 0.080 (e) -0.69 Since it is a strong acid, it is 100% dissociated. The concentration of hydrogen ion is 0.20 mol/L. From the study outline: "Calculation of the equilibrium concentrations of all solution species in problems involving strong acids or bases. This includes finding pH." 3. (2) What is the pH of a 0.20 mol/L solution of KClO 3 (aq)? (a) 0.69 (b) 0.30 (c) -0.20 (d) -0.69 (e) 7.00 ClO 3 - is the conjugate base of a strong acid, and therefore not a base. The solution is neutral. The potassium ion is just a "spectator ion." From the study outline: " Know that ionic compounds (metal-nonmetal) are always 100% ionized (dissociated into ions) in solution." And "Calculation of the equilibrium concentrations of all solution species in problems involving strong acids or bases. This includes finding pH." 4. (2) What is [OH - ] of a 0.20 mol/L solution of KClO 3 (aq)? (a) 7.0e-1 M (b) 1.0e-14 M (c) 0.69 M (d) 1.0e-7 M (e) 0.20 M
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5. (2) What is the pOH of a 0.20 mol/L solution of HClO 3 (aq)? (a) 7.00 (b) 13.30 (c) 0.20 (d) 0.70 (e) none of these 6. (2) What is the pOH of a 0.20 mol/L solution of KClO 3 (aq)? (a) 13.30
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This note was uploaded on 04/07/2008 for the course CHEM 103B taught by Professor Keller during the Spring '08 term at University of Arizona- Tucson.

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Chemistry 103B Exam - Chemistry 103B Exam 2 Answer Key Form A 1(2 What is[H3O for a solution that has pOH = 5.640(a 8.360 M(b 2.34e-4 M(c 2.29e-6

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