CHEMISTRY 14B PRACTICE FINAL EXAMINATION 1. a. Label the sterochemistry at the chirality centers and indicate the maximum number of possible diastereoisomers: NH2OH b. Draw the perspective structure of (2R,3R)-2-bromo-3-chloropentane. c. Draw the Fischer projection for the following perspective structures: OHONH2OHBrNHNH3+CO2-d. Indicate the total number of actual stereoisomers in each of the following structures: OHClClCl Actual number Of isomers: _____ ______ ________ e. Draw the chair conformer of cis-1, 2-diaminocyclohexane. How many chirality centers does this compound have? Is it optically active? Briefly explain your answer.2. a. Draw the structure from the name: (E)-3-bromo-2-heptene chloromethylcyclohexane (3R)-3-bromomethyl-2,3-dimethylpentane b. Give the complete IUPAC name for the following: BrClOHHOCl3. A galvanic cell is constructed in which the overall reaction is Pb(s) + 2H3O(aq)+→ Pb(aq)2+ + H2(g) + 2H2O(l) a. Calculate ∆E0 for this cell, given the standard potential for Pb is Pb(aq)2+ + 2e- → Pb(s) E0=− 0.126 V b. Chloride ions are added until PbCl2 precipitates at the anode and [Cl-] reaches 0.15 M. The cell voltage is then measured to be 0.22 V at pH = 0.0 and P(H2) = 1.0 atm. Calculate [Pb2+] under these conditions. c. Calculate the solubility product constant Ksp of PbCl2.4. a. Complete and balance the following equations for reactions taking place in acidic solution. MnO4(aq)−+ H2S(g)→ Mn(aq)2++ SO4(aq)2− Sn(s)+ NO3(aq)−→ Sn(aq)4++ N2O(g) b. Complete and balance the following equations for reactions taking place in basic solution. OCl(aq)−+ I(aq)−→ IO3(aq)-+ Cl(aq)− H2BO3(aq)−+ Al(s)→ BH4(aq)−+
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