exam3fall2011f3

exam3fall2011f3 - ThirdExaminationFall2011...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Fall 2011 General Chemistry II R. Lopez de la Vega Name___________________________________ Bubble in the form number in the section entitled Grade or Educ in the scantron. MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following acids (listed with K a values) and their conjugate base would form a buffer with a pH of 2.34? A) HC 7 H 5 O 2 , K a = 6.5 x 10 - 5 B) HClO 2 , K a = 1.1 x 10 - 2 C) HF, K a = 3.5 x 10 - 4 D) HClO, K a = 2.9 x 10 - 8 E) HCN, K a = 4.9 x 10 - 10 1) 2) Which of the following is NOT true for Δ G rxn ? A) If Δ rxn > 0, the reaction is spontaneous in the reverse direction. B) If Q = 1, then Δ G rxn = Δ rxn . C) If Δ rxn = 0, the reaction is spontaneous in the reverse direction. D) If Δ rxn > 0, the reaction is spontaneous in the forward direction. E) Under equilibrium conditions, Δ G rxn = 0. 2) 3) What is the pH of a solution made by mixing 40.00 mL of 0.100 M HCl with 25.00 mL of 0.100 M KOH? Assume that the volumes of the solutions are additive. A) 0.64 B) 10.00 C) 13.36 D) 12.36 E) 1.64 3) 4) A solution containing AgNO 3 is mixed with a solution of NaCl to form a solution that is 0.10 M in AgNO 3 and 0.075 M in NaCl. What will happen once these solutions are mixed? K sp (AgCl) = 1.77 × 10 - 10 . A) Silver chloride will precipitate out of solution, leaving an unsaturated solution of AgCl. B) Nothing will happen since the molar solubility of AgCl is higher than the solution concentrations. C) Silver chloride will precipitate out of solution, leaving a saturated AgCl solution. D) Nothing will happen since NaCl and AgNO 3 are both soluble compounds. E) There is not enough information to say anything about this solution. 4) 5) Which of the following processes shows a decrease in entropy of the system? A) CH 3 OH(l) CO(g) + 2H 2 (g) B) 2 NO(g) + O 2 (g) 2 NO 2 (g) C) COCl 2 (g) CO(g) + Cl 2 (g) D) NaClO 3 (s) Na + (aq) + ClO 3 - (aq) E) None of the above will show a decrease in entropy. 5)
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 7

exam3fall2011f3 - ThirdExaminationFall2011...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online