Quiz 9/19
• Draw and label a diagram of a voltaic cell
made of Silver (Ag) and Calcium (Ca). The salt
bridge is comprised of a NaNO3 solution.
– Be sure to label:
•
•
•
•
•
Anode
Cathode
½ reactions at each electrode
Direction of electron flow
Direction of the ions from the salt bridge
Representing Voltaic Cells
Standard Electrode Potentials
• We will get to them….Just quantitative version
of our activity series table.
9.5 Electrolytic Cells
9.5.1, 9.5.2, 9.5.3, 9.5.4
Pg. 876-878
Opposite of Voltaic Cells
• Voltaic: Chemical Reactions (Redox) 
Electricity
• Electrolytic Cells: electricity  nonspontaneous chemical reactions
http://www.ibchem.com/IB/ibnotes/brief/redsl.htm#anch5
Key Ideas
• Things are BACKWARDS from voltaic cells
• Cathode = negative electrode
– Think that cations are attracted to the cathode
• Oxidation or Reduction here?
• Anode = positive electrode
– Think that anions are attracted to the anode
• Oxidation or reduction here?
Electrolysis of Molten Ionic Liquids
• Used to obtain reactive metals from their ores
• Must be molten to have motile ions!
– Non-motile = no electrolysis
Conduction of Current
• See Ms. Hall’s Diagram
Homework
• Online Text (“Alternative Text”) Chapter 9.
• pg. 250-251
• Exercise 9.5, #1-5
• Answer key to chapter 9 is also posted on my website in
the same location.