The formula of chlorous acid is A HOCl B HClO2 C HClO3 D HClO4 E

28. Consider the cell: zn(s) I zn2+ (aq, ? M) Il Ni2+ (aq, 0.150 M) I Ni(s) EO = -0.257 V Zn2+(aq)/Zn(s) = -0.762 V The measured potential of the cell is +0.488 V. What is [Zn2+l at 25 o c? A. 0.040 M B. 0.563 M C. 0.650M D. 0.150M

22. The compound para-nitrophenol (shown), has a pKa value of 7.14. What pH of a 0.214 M solution of its coniugate base?

The Kw of pure water at 60°C is 5.60 x10-14. What is the concentration of hydroxide ions under these conditions? A. 0.0 x10° M B. 1.0 x10-7 M C. 2.4 x10-7 M D. 4.2 x10-7 M E. 2.8 x10-14 M

38. Which of the following bases has the smallest pK? A. NH3 B. CHaNHa C. CHaCHaNH D. (CH;CH2)2NH E. BrNHa

34. The compound para-nitrophenol (shown), has a pKa value of 7.14. What is the pKb of its conjugate base? A. 6.14 B. 6.86 C. 7.14 D. 7.86 E. 14.00

14. A 0.177 M NaCl solution that is saturated in PbC12 has a [Pb2+] = 5.1 E-4 M. What numerical value of Ksp for PbC12 obtained with these data? A. B. c. 6.4 x 10 5 E. 1.8x104