Practice Exam #2

Practice Exam #2 - Hunter College City University of New...

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1 Hunter College City University of New York Chem. 104 Exam II practice (Chapters 13, 14, 15 & 16) Summer 2010 Multiple Choices 1. You have a solution of 1x10 -5 M in OH - at 25 C. The solution is: a. acidic b. neutral c. basic d. Can’t be determined 2. What is the pH of 1x10 -10 M hydrobromic acid? a. 10.00 b. 5.00 c. 7.00 d. 3.50 3. Which of the following will give an acidic solution in water? a. PH 3 b. K 2 O c. NaCl d. SO 2 4. Consider the reaction: 2HgO(s) 2Hg(l) + O 2 (g) which of following will shift the equilibrium toward the reactants? I) more HgO is added; II) decreasing the pressure; III) more O 2 is added a. I and III b. II only c. I, II and III d. III only 5. Consider the reaction: NO 2 (g) + CO(g) NO(g) + CO 2 (g) A 1L vessel at 400 C contains the equilibrium concentrations [NO] = 0.1 M, [CO 2 ]= 0.02 M, [NO 2 ] = 0.01 M, and [CO] = 0.1M. What is the value of the equilibrium constant K c for the reaction? a. 0.5 b. 5 c. 1 d. 2
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2 6. Determine the pH of a 5.5 ×10 −2 M solution of HClO 4 . Ka = 4x10 8 a. 1.25 b. 0.95 c. 7.00 d. 6.48 7. Which of the following mixtures can produce a buffer? a. CH 3 COOH, CH 3 COONa b. H + + OH c. HCl + NaOH d. all of the above 8. Identify which salt produces a neutral aqueous solution. a. KF b. NaCl c. NaCN d . AgNO 3 9. What is the pH when HCOOH is titrated with NaOH? a. pH < 7.00
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Practice Exam #2 - Hunter College City University of New...

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