Chapter 20: Electrochemistry

Electrochemistry

Electrochemical Reactions – tutorial on electrochemistry, including voltaic cells, oxidation-reduction reactions, and practice problems.

http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch20/electro.php#nernst

http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch20/electro.php#nernst

(Main Idea: Electrochemical cells separate oxidation reactions from reduction reactions.)

 

Voltaic Cells

How Fuel Cells Work – description of the electrochemical reaction that converts chemical energy into electrical energy.

http://www.pbs.org/wgbh/nova/tech/fuel-cell-work.html

(Main Idea: Batteries and fuel cells are two types of voltaic cells.)

Voltaic Cells – explanation of voltaic cells and the redox reactions that make them work.

http://chemwiki.ucdavis.edu/Analytical_Chemistry/Electrochemistry/Voltaic_Cells

http://chemwiki.ucdavis.edu/Analytical_Chemistry/Electrochemistry/Voltaic_Cells

(Main Idea: The electric potential of a voltaic cell depends on the strengths of the oxidizing and reducing agents.)

Voltaic Cell – interactive demo of a laboratory voltaic cell experiment.  Choose the metals and the solutions to test the conductivity of different combinations.

http://www.chem.iastate.edu/group/Greenbowe/sections/projectfolder/flashfiles/electroChem/volticCell.html

(Main Idea: The electric potential of a voltaic cell depends on the strengths of the oxidizing and reducing agents.)

Clickable Fuel Cell Car – interactive view of the unique parts of a hydrogen fuel cell car, from the motor to the hydrogen tanks to the cooling system.

http://www.pbs.org/wgbh/nova/tech/fuel-cell-car.html

(Main Idea: Batteries and fuel cells are two types of voltaic cells.)

Corrosion

Electrochemical Corrosion – description of corrosion, including its causes and the chemistry at work when iron corrodes.

http://chemwiki.ucdavis.edu/Analytical_Chemistry/Electrochemistry/Electrochemistry_7%3a_Electrochemical_Corrosion

http://chemwiki.ucdavis.edu/Analytical_Chemistry/Electrochemistry/Electrochemistry_7%3a_Electrochemical_Corrosion

(Main Idea: Exposure to water and oxygen causes iron to corrode.)

Rusting – Video describing an experiment you can perform to understand rusting.

http://www.tutorvista.com/chemistry/animations/rusting-iron-animation

(Main Idea: Exposure to water and oxygen causes iron to corrode.)

Electrolytic Cells

Electrolytic Cells – introduction to electrolytic cells, in which electrical energy is required to produce nonspontaneous redox reactions.

http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/electrolyt.html

(Main Idea: Nonspontaneous redox reactions occur in electrolytic cells.)

Electrolytic Cells – discussion of electrolytic cells, where the redox reaction occurs in the opposite direction of those in voltaic cells.

http://chemwiki.ucdavis.edu/Analytical_Chemistry/Electrochemistry/Electrolytic_Cells

(Main Idea: Nonspontaneous redox reactions occur in electrolytic cells.)