Review of Midterm - Review Questions for Midterm 1....

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Review Questions for Midterm 1. Calculate the pH of a solution labeled "0.25 M C 17 H 19 O 3 N (aq)". (pK b of C 17 H 19 O 3 N is 5.79) 2. A 0.050 M aqueous solution of aniline, C 6 H 5 NH 2 , is 9.3 × 10 – 3 % protonated. Calculate the pK b for aniline. 3. Calculate the pH of a solution labelled "0.023 M HBrO (aq)". (pK a of HBrO = 8.69) 4. The pH of 0.10 M HClO 2 is 1.57. Determine the K a of HClO 2 . 5. a) Determine the equilibrium expression for the reaction: CO 2 (g) + H 2 (g) H 2 O(g) + CO(g) Given: H 2 O(g) H 2 (g) + ½ O 2 (g); K 1 = 4.0 × 10 – 6 2CO 2 (g) 2CO(g) + O 2 (g); K 2 = 1.3 × 10 – 10 b) A mixture of CO 2 , H 2 , H 2 O and CO, concentrations of 2, 1, 4, 2 M, respectively was introduced into a container. Will CO 2 tend to react as the reaction proceeds towards equilibrium? 6. a) How would you prepare 75.0 mL of 0.550 M KCl solution from 0.375 M KCl? b) How would you prepare 75.0 mL of 0.350 M KCl solution from 0.575 M KCl? 7.
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