34) Consider this reaction, whose Kc= 33. SO2(g) + NO2(g) <===> SO3(g) + NO(g) If 0.10 mol each of SO2and NO2are placed in a 1.0 L container, what is the concentration of SO2at equilibrium? (A) 0.0030 M (B) 0.015 M (C) 0.085 M (D) 0.097 M 35) Consider this reaction. reaction? 36) What will be the result if 100 mL of 0.06 M Mg(NO 3)2is added to 50 mL of 0.06 M Na2C2O4 ?
The Kspof MgC2O4(s) equals 8.6 x 10¯5 37) Calculate the percentage of pyridine, C5H5N, that forms pyridinium ion, C5H5NH+, in a 0.10 M aqueous pyridine solution (Kbfor C5H5N = 1.7 x 10¯9) (A) 0.0060% (B) 0.013% (C) 0.77% (D) 1.6% 38) The conjugate acid and conjugate base of HSO4¯ are, respectively, 39) When the acids: HClO3, H2SO3, H3BO3are arranged in order of increasing stength (weakest acid first), the correct order is 40) Which combinations of equal volumes of solution will result in buffer solutions? I. 0.1 M HCl and 0.1 M NH3 (A) I only (B) II only (C) I and III only (D) II and III only 41) A solution contains 20 mmol H3PO4and 10 mmol NaH2PO4. What many mmol of NaOH must be added to convert all the phosphate to HPO 4 ¯?
42) Which represents an acid-base reaction according to the Lewis definition but notaccording to the Brønsted-Lowry definition? (D) Fe(H2O)63+(aq) + H2O(l) <===> [Fe(H2O)5OH]2+(aq) + H3O+(aq) 43) If an aqueous sodium chloride solution is electrolyzed, which phenomenon is notobserved? (C) the solution becomes more basic. (D) H2(g) is produced at the cathode. 44) Standard Reduction Potentials E° Pb2+(aq) + 2 e¯ ---> Pb(s) - 0.127 V Cu+(aq) + e¯ ---> Cu(s) +0.518 V Which statement is true about a galvanic cell employing Pb, Cu, Pb2+, and Cu+? (A) The cell potential increases when the Cu+solution is diluted. (B) Anions flow from the lead half-cell to the copper half-cell through the salt bridge. (C) Twice as many electrons pass through the lead electrode as through the copper. (D) The concentration of the cation in the cathode compartment changes faster than the cation concentration in the anode compartment.
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