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Ch.9: Lesson 5 -Intro to Electrochemistry- Ch.9: Lesson 5 -Intro to Electrochemistry-
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Do Now: Add e- to Balance Cl Cl Mn Mn Cl Cl Mn Mn 0 -3 +4 +7
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Electrochemistry Branch of chemistry that deals with relations between electrical and chemical processes Areas of focus 1. Redox potential from Table J 2. ? 3. ? Branch of chemistry that deals with relations between electrical and chemical processes Areas of focus 1. Redox potential from Table J 2. ? 3. ?
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Redox Potentials and Metal/Nonmetal Activity Table J General rule: Elements at top are more reactive Metals = high potential to be oxidized Nonmetals = high potential to be reduced Table J General rule: Elements at top are more reactive Metals = high potential to be oxidized Nonmetals = high potential to be reduced
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Table J 1. Which metal has the greatest potential to be oxidized? 2. Which nonmetal has the greatest potential to be reduced? 3. Which is more active, Rb or Cu? 4. Co or Fe? 5. Ag or Sr? 1. Which metal has the greatest potential to be oxidized? 2. Which nonmetal has the greatest potential to be reduced? 3. Which is more active, Rb or Cu? 4. Co or Fe? 5. Ag or Sr?
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Metals on Table J Metals higher on Table J more likely to be oxidized Metals lower on Table J more likely to be reduced Which reaction is more likely to happen? Metals higher on Table J more likely to be oxidized Metals lower on Table J more likely to be reduced Which reaction is more likely to happen? 1) Cu + Al Cu + Al 2) Cu + Al Cu + Al +2 0 0 +3 0 +3 +2 0
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Nonmetals on Table J Nonmetals higher on Table J more likely to be reduced Nonmetals lower on Table J more likely to be oxidized Which reaction is more likely to happen? Nonmetals higher on Table J more likely to be reduced Nonmetals lower on Table J more likely to be oxidized Which reaction is more likely to happen? 1) Cl 2 + 2 F 2 Cl + F 2 2) F 2 + 2 Cl 2 F + Cl 2 0 -1 -1 0
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Practice Which of these metals has the greatest potential to be oxidized? The least? Fe Zn Cu Na Which nonmetal has the greatest potential to be oxidized? The least? F 2 Cl 2 Br 2 I 2 Which of these metals has the greatest potential to be oxidized? The least? Fe Zn Cu Na Which nonmetal has the greatest potential to be oxidized? The least? F 2 Cl 2 Br 2 I 2
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When these pairs react, which is oxidized and which is reduced?
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