C ags ag aq pb 2 aq pbs d pbs ag 2 so 4 aq pbso 4 aq

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c) Ag(s)| Ag + (aq) || Pb 2+( aq)| Pb(s) d) Pb(s)| Ag 2 SO 4 (aq) || PbSO 4 (aq)| Ag(s) e) Pb(s)| Pb 2+ (aq) || Ag + (aq)| 2Ag(s) 3. Which chemical species will displace Ag + but not Pb 2+ ? a) Cu 2+ b) Br 2 c) Al 3+ d) NO 3 - e) All of the above
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3 4. If the voltmeter displays a negative voltage the reaction is: a) Non-spontaneous b) In equilibrium c) Endothermic d) Exothermic e) Spontaneous 5. Which of the following would increase the voltage of the cell shown below the most? Zn(s) | Zn 2+ (aq)|| Fe 3+ (aq), Fe 2+ (aq)| Pt(s) a) Double [Fe 2+ ] b) Halve [Zn 2+ ] c) Halve [Fe 3+ ] d) Decrease pH e) Double [Fe 3+ ] 6. Commonly, electroplating is performed in order to protect the metal from: a) Impurities b) Conduction c) Corrosion d) Pollutants e) None of the above 7. Which of the following statements is incorrect ? a) A salt bridge is used to avoid a charge build up in the half-cells. b) The anion in the salt bridge will migrate towards the anode in a working galvanic cell. c) A salt bridge is not always required in an electrochemical cell. d) The cathode in a voltaic cell is positively (+) charged. e) None; all are correct. 8. Name the coordination compound shown below: [CrSO 4 (NH 3 ) 5 ]Cl a) pentaamminesulfatochromium(III) chloride b) chromium(II)sulfatopentaamine chloride c) pentaamminechlorosulfate chromium(II) d) pentaamminesulfatochromium (II) chloride e) pentaamminesulfatochromate(III) chloride
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4 9. Consider the following reaction: Fe 2+ (aq) + 2Na(s) ! Fe(s) + 2Na + (aq) Which statement below is TRUE? a) Electrons are flowing from the Fe electrode to the Na electrode. b) The Fe(s) electrode is the anode. c) The E°cell value is -3.15 V. d) The shorthand notation is Fe 2+( aq)|Fe(s) || Na(s)|Na + (aq) e) This reaction is taking place in a voltaic cell. 10. In the compound [AlCl(OH)(en) 2 ]Cl the oxidation state of aluminum and the coordination number, respectively, are: a) +3 and six b) +1 and seven c) -1 and seven d) +3 and eight e) +2 and six 11. Which complex(es) is(are) colorless?
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