In this lesson our instructor talks about electrochemistry. First, he discusses redox reactions, voltaic cells, and electrochemical potentials. Then he talks about the Nernst equation, Gibb's free energy and electrochemistry. He also lectures on charge, current, and time. He ends the lesson with a summary and two helpful sample problems. Electrochemistry Electrochemistry studies how chemical energy can be produced and converted into mechanical energy, which in turn can perform work such as powering an electrical device. A potential is produced when there is a transfer of electrons from the reducing agent to the oxidizing agent which can happen in neutral, acidic, or basic media. The Nernst equation allows for determination of the cell potential when not at standard conditions.