Name ______________________________________ Date _______________ Per _____              Oxidation Reduction and Electroche...
•   What is the purpose of the salt bridge?•   Which direction do electrons flow through the wire?•   Which electrode diss...
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Chemistry - Chp 20 - Oxidation Reduction - Study Guide

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Chemistry - Chp 20 - Oxidation Reduction - Study Guide

  1. 1. Name ______________________________________ Date _______________ Per _____ Oxidation Reduction and Electrochemistry Review Sheet• What is transferred between reactants in Redox reactions• What is Oxidation?• What is Reduction?• How do you know when a chemical reaction is not a redox reaction?• What is the oxidizing agent?• What is the reducing agent?• Know the rules for assigning oxidation numbers 1. The oxidation number of any uncombined element is _____________ 2. The oxidation number of a monoatomic ion ______________________________ 3. The oxidation number of oxygen in compounds is __________ 4. The oxidation number of hydrogen in compounds is _________ 5. The sum of the oxidation numbers of the atoms in the compound must equal ____ 6. The sum of the oxidation number in the formula of a polyatomic ion is equal to its __________________________• Are metals or nonmetals better oxidizers? Why?• Are metals or nonmetals better oxidizing agents? Why?• Be able to write and identify redox half reactions (Write an example)• Know everything about electrochemical (voltaic) cells.• Cathode (what happens there? Is it positive or negative?• Anode (what happens there? Is it positive or negative?• How do you decide which electrode is the anode and which is the cathode?
  2. 2. • What is the purpose of the salt bridge?• Which direction do electrons flow through the wire?• Which electrode dissolves away and which one gains atoms and gets heavier?• Know everything about electrolytic cells• Cathode (what happens there? Is it positive or negative?• Anode (what happens there? Is it positive or negative?• How do you decide which electrode is the anode and which is the cathode?• To which electrode do the positive ions in the solution in an electrolytic cell migrate? What about the negative electrodes?• What is the difference between electrochemical (Voltaic) and electrolytic cells?

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