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PEXAM3Myers07 - CHM 2046 1 PRACTICE EXAM#3 Which...

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CHM 2046 PRACTICE EXAM #3 1. Which combination should result in no appreciable (redox) reaction ? (1) Ag + HCl(aq) (2) Ag + HNO 3 (aq) (3) Ag + O 2 (acidic solution) (4) Cl 2 + H 2 O (5) Fe + Fe 2 (SO 4 ) 3 (aq) 2. Which combination above will result in the redox reaction with the largest E º ? 3. To oxide Fe to Fe +2 (but not further to Fe +3 ) one could use which of these as the oxidizing agent . (1) I (2) Cu (3) Cu +2 (4) HNO 3 (aq) (5) Mg +2 4. The principal reason for adding Cr to Fe is to make steel more which of these? (1) hard (2) reactive (3) diamagnetic (4) paramagnetic (5) corrosion resistant 5. Match each description with one of these metals: Ca, Ni, Pb. a. Soft, forms +2 and +4 ions _____ b. Reacts with water, only one common oxidation state _____ c. Hard, used in high quality stainless steels ______ What are the metals listed in order as a, b, c? (1) Ca, Pb, Ni (2) Ni, Ca, Pb (3) Ni, Pb, Ca (4) Pb, Ca, Ni (5) Pb, Ni, Ca 6. What is the systematic name for [Co(en) 2 Cl 2 ] 2 SO 4 ? (1) bis(dichlorodiethylendiamine)cobalt(II) sulfate (2) bis(ethylenediamine)dichlorocobalt(III) sulfato (3)
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