32. Which reation characteristics will be affected by a change in temperature?1. value of equilibrium constant2. equilibrium concentrations(A) 1 only(B) 2 only(C) 1 and 2 only(D) neither 1 nor 233. A water solution of sodium carbonate, Na2CO3, has a pH greater than 7 because34. Which species dissociates most completely in water solution?35. When one mole of (NH4)2HPO4(s) dissolves in water, the number of moles of ions present is closest to which value?36. The dissociation constant for a certian weak monoprotic acid is 9.0 x 10¯5. What is the [H+] of a 0.10 M solution of this weak acidthat is 0.010 M in the sodium salt of the acid?(A) 9.0 x 10¯6(B) 9.0 x 10¯4(C) 3.0 x 10¯3(D) 3.0 x 10¯237. According to Bronsted-Lowry Theory, which of these species cannot be amphoteric?38. Which of these solutions, appropriately combined, could be used to produce a buffer?39. The solubility of PbI2is 0.0013 mol L¯1. Use this information to find the Kspfor PbI2.
40. For this reaction, E°cell= 0.79 V.6 I¯(aq) + Cr2O72¯(aq) + 14 H+---> 3 I2(aq) +2 Cr3+(aq) + 7 H2O(aq)Given that the standard reduction potential for Cr2O72¯(aq) ---> 2Cr3+(aq) is 1.33 V, what is E°redfor I2(aq)?(A) +0.54 V(B) -0.54 V(C) +0.18 V(D) -0.18 V41. What is the product formed at the anode inthe electrolysis of 1.0 M NaNO3(aq)?(A) H2(g)(B) NO2(g)(C) O2(g)(D) Na(s)42. Which of these ions is the best reducing agent?43. Zn(s) + Cl2(g, 1 atm) <===> Zn2+(aq, 1 M) + 2Cl¯(aq, 1 M) An electrochemical cell based on this reaction has a cell voltage, E°, of 2.12 V. Which change could make the cell voltage greater than 2.12 V?44. What is the total number of p orbitals completely or partially filled in a gaseous silicon atom in its ground state?(A) 1(B) 2(C) 4(D) 5
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