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8. Classify as spontaneous or no reaction. If spontaneous, write out the complete reaction. a) Ni²+ + Ag(s) b) Zn²+ c) Ag(s) +¯¯ e) H+ + Fe(s) g) Sn²+ + Co(s) i) h) Cu*+Sn(s) Al³+ +Ni(s) j) Hg²+ +H₂(g) 4+ +Li(s) d) H+ + Cu(s) Sn++Au(s) 9. Which f) gor oxidizing agent?

8. Classify as spontaneous or no reaction. If spontaneous, write out the complete reaction. a) Ni²+ + Ag(s) b) Zn²+ c) Ag(s) +¯¯ e) H+ + Fe(s) g) Sn²+ + Co(s) i) h) Cu*+Sn(s) Al³+ +Ni(s) j) Hg²+ +H₂(g) 4+ +Li(s) d) H+ + Cu(s) Sn++Au(s) 9. Which f) gor oxidizing agent?

Chemistry: Principles and Reactions
Chemistry: Principles and Reactions
8th Edition
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:William L. Masterton, Cecile N. Hurley
Chapter17: Electrochemistry
Section: Chapter Questions
Problem 10QAP
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8a and 8b
199 A FINAL COMMENT When H is present, it must be treated like any other reactant. For example, if you are asked whether the SO +4H +2e H₂SO3 + 2 H₂O 50 in a solution of Na₂SO will reduce: +0.17 solution is "ACIDIC". In the same way that the reduction doesn't occur if SO is absent, there is no reaction if your answer should be "there is no reaction UNLESS H* is present also", or equivalently, that the Note that H* is a necessary reactant in many reduction reactions. However, there is only ONE reaction in which H* is the only substance involved in the reduction half-reaction: H* is absent. 2 H+2 eH₂(g) 0.00. EXERCISES: 7. Using the Standard Reduction Potential table, state whether the following species • can only undergo reduction, or • can only undergo oxidation, or • cannot react at all, or • can undergo either reduction or oxidation (because it is found on both sides of the Table). (a) Na* (c) Cut (e) NO3 (g) Fe²+ (i) Se(s) (k) Al(s) (b) r (d) Sn4+ (f) Hg(1) (h) Co²+ (1) acidic Cr₂O7 8. Classify as spontaneous or no reaction. If spontaneous, (1) Sn²+ write out the complete reaction. a) Ni²+ + Ag(s) b) Zn²+ e) H+ + Fe(s) g) Sn²+ + Co(s) i) c) Ag(s) + 1 +Li(s) d) H+ + Cu(s) Al³+ +Ni(s) j) Hg²+ + H₂(g) f) Sn4+. 4+ + Au(s) h) Cu* + Sn(s) 9. Which member of each of the following pairs is the stronger oxidizing agent? a) Zn²+ or Ca²+ b) Cr3+ or Cu²+ c) Br₂ or l2 10. Which member of each of the following pairs is the stronger reducing agent? a) Mn or Pb c) Cr²+ or Fe²+ b) Cut or Sn²+ 11. Predict whether a spontaneous reaction is expected when the following are mixed, and state the products of any spontaneous reactions. a) Zn(s) and H₂(g) b) Sn(s) and Sn4+ e) Fe²+ is added to acidic Cr₂O7²- c) H is added to Mn(s) f) Cu(s) and H* d) Fe²+ is added to Cr₂0² g) A mixture of MnO₂(s) and H* is added to I h) So is added to Sn(s) 12. a) Which of Cr, l2, Al and Fe³+ will oxidize Co? b) Which of H2, Cl₂, Hg and H₂O2 will reduce Ag* ? c) Which of I, Pb, Br₂ and Sn²+ will act as reducing agents for Sn4+? d) Which of Cult NO and ST will act as oxidizing agents for aqueous SO₂ (i.e. H₂SO3)? nidic so²?
Transcribed Image Text:199 A FINAL COMMENT When H is present, it must be treated like any other reactant. For example, if you are asked whether the SO +4H +2e H₂SO3 + 2 H₂O 50 in a solution of Na₂SO will reduce: +0.17 solution is "ACIDIC". In the same way that the reduction doesn't occur if SO is absent, there is no reaction if your answer should be "there is no reaction UNLESS H* is present also", or equivalently, that the Note that H* is a necessary reactant in many reduction reactions. However, there is only ONE reaction in which H* is the only substance involved in the reduction half-reaction: H* is absent. 2 H+2 eH₂(g) 0.00. EXERCISES: 7. Using the Standard Reduction Potential table, state whether the following species • can only undergo reduction, or • can only undergo oxidation, or • cannot react at all, or • can undergo either reduction or oxidation (because it is found on both sides of the Table). (a) Na* (c) Cut (e) NO3 (g) Fe²+ (i) Se(s) (k) Al(s) (b) r (d) Sn4+ (f) Hg(1) (h) Co²+ (1) acidic Cr₂O7 8. Classify as spontaneous or no reaction. If spontaneous, (1) Sn²+ write out the complete reaction. a) Ni²+ + Ag(s) b) Zn²+ e) H+ + Fe(s) g) Sn²+ + Co(s) i) c) Ag(s) + 1 +Li(s) d) H+ + Cu(s) Al³+ +Ni(s) j) Hg²+ + H₂(g) f) Sn4+. 4+ + Au(s) h) Cu* + Sn(s) 9. Which member of each of the following pairs is the stronger oxidizing agent? a) Zn²+ or Ca²+ b) Cr3+ or Cu²+ c) Br₂ or l2 10. Which member of each of the following pairs is the stronger reducing agent? a) Mn or Pb c) Cr²+ or Fe²+ b) Cut or Sn²+ 11. Predict whether a spontaneous reaction is expected when the following are mixed, and state the products of any spontaneous reactions. a) Zn(s) and H₂(g) b) Sn(s) and Sn4+ e) Fe²+ is added to acidic Cr₂O7²- c) H is added to Mn(s) f) Cu(s) and H* d) Fe²+ is added to Cr₂0² g) A mixture of MnO₂(s) and H* is added to I h) So is added to Sn(s) 12. a) Which of Cr, l2, Al and Fe³+ will oxidize Co? b) Which of H2, Cl₂, Hg and H₂O2 will reduce Ag* ? c) Which of I, Pb, Br₂ and Sn²+ will act as reducing agents for Sn4+? d) Which of Cult NO and ST will act as oxidizing agents for aqueous SO₂ (i.e. H₂SO3)? nidic so²?
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