29. When 50.0 mL of 0.200 M HCl is mixed with 150.0 mL of 0.100 M NaOH, the reaction is as shown. NaOH(aq) + HCl(aq) ---> NaCl(aq) + H2O(l) What is the concentration of the resulting solution? (A) 0.0500 M NaCl (B) 0.100 M NaCl (C) 0.0500 M NaCl and 0.0250 M NaOH (D) 0.0500 M NaCl and 0.0500 M NaOH
30. Refer to the heating curve to the right for 50.0 g of a compound with a molar mass of 94.1 g. What is the melting point of the compound? 31. Which would you expect to be the strongest acid? 32. The solubility of which salt is not pH dependent? 33. Consider a reaction 2 A(s) + B(g) <===> 2 C(g). If 0.20 mol A, 0.30 mol B and 0.10 mol C are present in a 1. 0 L flask at equilibrium, what is Kc? (A) 0.033 (B) 0.83 (C) 1.67 (D) 30.3 34. Which effect will not increase the amount of CO(g) present at equilibrium? The reaction is endothermic. CO2(g) + H2(g) <===> CO(g) + H2O(g)
(C) Increase the volume of the container. (D) Increase the temperature of the container. 35. Which 0.500 M solution has the lowest pH? 36. 0.2 M hypochlorous acid (pKa= 7.51) is titrated with 0.2 M sodium hydroxide solution. Which indicator of those with ranges listed would be most appropriate for marking the endpoint of this titration? 37. Which oxide is the most acidic? (A) MgO (B) CO2(C) SO2(D) SO338. Which set of quantum numbers represents a 2p electron? n l m s 39. Which is not true for the transition metal elements? 40. Which coupound is most likely to form intermolecular hydrogen bonds?
41. An aqueous solution of which salt would be expected to have the most basic pH? (A) Na2CO3(B) NaC2H3O2(C) NaCl (D) NH4Cl 42. What is the approximate pH of an aqueous 1 x 10¯9M HCl solution? Use the titration curve below to answer questions 43-45. 43. Which point indicates the region where the solution behaves as a buffer? 44. Which point indicates the equivalence point of the titration?
45. The titration curve best describes a titration between (A) a strong acid and a strong base. (B) a strong acid and weak base. (C) a weak acid and a strong base (D) a weak acid and a weak base.