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. • 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?