Unit 12- Electrochemistry

• What is reduction?

  gain of electrons
• What is oxidation?

  loss of electrons
• What does a positive electrode potential show?

  Shows the species is a better oxidizing reagent
• What is a galvanic cell?

  An electrochemical cell that produces electricity as a result of a spontaneous reaction
• Where do you place the highest potential in a diagram?

  On right-hand side
• Where does reduction occur?

  Cathode
• Where does oxidation occur?

  Anode
• What is the standard electrode potential formula?

  E cell = E cathode - E anode
• What is the gibbs formula for electrochemical cells?


  -n F E cell
• What is the standard electrode

  Hydrogen
• What is the Nernst equation?


  Ecell = E0cell (-0.0591/n ) logQ
• What is the value of Q in the nernst equation?

  Products / reactants
• What is the notation for the cell diagrams?


  Anode / solution / Cathode
• What are concentration cells?

  Two half cells with identical electrodes but with different ionic concentrations
• What is electrolysis?

  Process of driving a reaction in a non-spontaneous direction by using an electrical current
• What is faraday's law?


  1 mole of electrons = 96500 C
• What is the formula for charge supplied?

  Q = current (I) * T (time)
• What is the formula for number of moles?

  Current time 1 mole of electrons / 96500
• What are some applications of electrochemical cells?

  Redox titrations , indicators , industrial production of Al , electrolytic refining