14.6 Electrochemistry Unit Review Do Now: HW, Reference Table, & Calculator Out

HW Answers

Annotations: 1) Write down the oxidation state of each element in the chemical equation. 2) Write down LEO & GER someplace. 3) On the diagram, write down LEO and GER to indicate which reactants are oxidized and reduced. 4) Write down “AN OX “ and “RED CAT.” Based on your answer to (3), label the anode and cathode in the diagram. 5) Draw an arrow to indicate the direction of electron flow (movement) through the wire.

Questions: 1. Write the half-reaction for the oxidation that occurs at the anode. _______________________________________   2. Write the half-reaction for the reduction that occurs at the cathode. _______________________________________ State the direction of electron flow in the voltaic cell: _________________________________________________________ 4. What is the function of the salt bridge? _________________________________________________________________________ 5. State, in terms of energy, why this is a voltaic cell. (is energy being created or used up) ______________________________________________________________________________