Practiceexam1

Practiceexam1 - Name: _ Date: _ 1. Given: NO3-(aq) NO(g),...

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Page 1 Name: __________________________ Date: _____________ 1. Given: NO 3 - (aq) NO(g), acidic solution. How many electrons appear in the balanced half-reaction? A) 8 B) 3 C) 2 D) 4 E) 6 2. Write the cell diagram for the reaction 2AgCl(s) + H 2 (g) 2Ag(s) + 2H + (aq) + 2Cl - (aq) A) Pt Cl - (aq) H + (aq) m H 2 (g) AgCl(s) Ag(s) B) Ag(s) AgCl(s) Cl - (aq) m H + (aq) H 2 (g) Pt C) Pt H 2 (g) H + (aq) m Cl - (aq) AgCl(s) Ag(s) D) Pt H 2 (g) H + (aq) m Cl - (aq) Ag(s) Pt E) Ag(s) AgCl(s) H + (aq) m Cl - (aq) H 2 (g) Pt 3. Which species will reduce Br 2 but not V 3+ ? A) Ce B) Zn C) Cu D) Cr 2+ E) Al 4. Which of the following is the strongest reducing agent? A) F - B) Co 2+ C) Fe 2+ D) H 2 E) Cr 2+
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Page 2 5. The standard potential of the Cu 2+ /Cu electrode is +0.34 V and the standard potential of the cell Ag(s) AgCl(s) Cl - (aq) m Cu 2+ (aq) Cu(s) is +0.12 V. What is the standard potential of the AgCl/Ag,Cl - electrode? A) - 0.46 V B) - 0.22 V C) +0.24 V D) +0.46 V E) +0.22 V 6. The standard potential of the cell Pb(s) PbSO 4 (s) SO 4 2 - (aq) m Pb 2+ (aq) Pb(s) is +0.23 V at 25 ° C. Calculate the K sp of PbSO 4 . A) 1.3 10 - 18 B) 1.7 10 - 8 C) 1.3 10 - 4 D) 2.7 10 - 17 E) 6.0 10 7 7. Which metal would be suitable to provide cathodic protection from corrosion for an aluminum bridge? A) Cu B) Ni C) None of the metals listed is suitable. D) Sn E) Pb 8. How many moles of O 2 (g) are produced by electrolysis of Na 2 SO 4 (aq) if 0.120 A is passed through the solution for 65.0 min? A) 0.00121 mol B) 0.0000808 mol C) 0.00242 mol D) 0.00485 mol E) 0.0000202 mol
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Page 3 9. Consider the following cell: Ag(s) Ag + (aq, 0.100 M)mAg + (aq, 0.100 M) Ag(s) What is the voltage of this cell?
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This note was uploaded on 06/12/2008 for the course CHEM 6C taught by Professor Hoeger during the Spring '08 term at UCSD.

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Practiceexam1 - Name: _ Date: _ 1. Given: NO3-(aq) NO(g),...

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