Chapter 21. Electrochemistry : Energy conversion between chemical and electrical forms. Voltaic Cells. Type of electrochemical cell (machine that uses redox to produce electrical energy, or uses electrical energy to cause a chem Rx)
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Energy conversion between chemical and electrical forms.
TO FIND the E° (the voltage) of a voltaic cell:
Ex 1 : Given a voltaic cell consisting of a Ag electrode in one half-cell and a Zn electrode in the other half-cell.
a. Determine the reduction potential for this cell.
(Hint: FAT RED CAT) The cathodegains mass. The metal ion gains electrons because it is reduced.
d. Which electrode loses mass?
(Hint: THIN OXAN) The anode loses mass. The metal is loses electrons, because it is oxidized.
e. Write the equation for the oxidation half reaction and write the equation for the reduction half reaction.
Line Notation = shorthand way to show a voltaic cell.
Oxidation oxidation reduction reduction
Reactants Products reactants products