Oxidation and Reduction
What is the definition of oxidation
Oxidation is the loss of electrons
What must be conserved in a redox reaction
Mass and charge
_________ energy gets converted to _________ energy in a voltaic cell
chemical -----> electrical
What particles flow in the wire of a cell
Electrons
What is the definition of reduction
Reduction is the gain of electrons
What is the balanced half-reaction of Cu in the reaction:
Cu+2 + Zn -----> Cu+ + Zn+2
Cu+2 + 1e- ----> Cu+
_________ energy gets converted to _________ energy in an electrolytic cell
Electrical -----> Chemical
What is the purpose of a salt bridge
Allows for the flow of ions
How do you determine the oxidation state of an element
Use your rules or calculate the elementx oxidation number
What is the balanced oxidation half-reaction for the reaction:
Li + Al+3 -----> Li+ + Al
Li -----> Li+ + 1e-
Explain the role of the anode and cathode in an electrochemical cell.
Anode = Oxidation
Cathode = Reduction
What is the rule for Hydrogen
+1 unless it is with a group 1 metal then it is -1
What happens to the oxidation number when an element gets reduced
The oxidation number decreases
What is the coefficent of Na in the balanced redox reaction:
Ti+3 + Na ------> Ti + Na+
3
What is the flow of electrons in an electrochemical cell
Anode ----> Cathode
What table gives you the relative activities of each metal
Table J
What is the difference between oxidizing and reducing agents?
Oxidizing agents get reduced, while reducing agents get oxidized.
Balance the following redox reaction:
Mn+ Fe+3 ------> Mn+4 + Fe
3Mn + 4Fe+3 -----> 3Mn+4 + 4Fe
What is the difference between a galvanic cell and an electrolytic cell
Electrolytic cells require an external power source
If a cell has a battery attached, what type of electrochemical cell is it
Electrolytic cell