Standard Chemistry - Electrochemistry Test
SO4-2 KMnO4 NCl3 H2O2
Cr2O7-2 + Mg ® Mg+2 + Cr+3
Be sure to:
label all parts including the cathode and anode
tell me what is in each beaker
what each wire is made of
What direction the electrons flow
What direction the ions in the salt bridge flow
Which side is the anode, and which is the cathode
H2O2 + Cu+1 ---> Cu+2 + H2O
H2O2 + Si ---> SiO2 + H2O (basic)
AuCl3® Au + Cl2
Bi2O3 +OCl- ---> BiO3- + Cl- (basic)
Sb2O3 + IO3- + Cl- ---> Sb(OH)6- + ICl (basic)
MnO4- + Fe+2 ---> Fe+3 + Mn+2
b) briefly answer all of the following questions:
In class we discussed two dangerous things about car batteries. Tell me about them (what the dangers are and how/why they can occur)
What makes a battery rechargeable?
What is the purpose of the paper (porous separator) in a regular cell (like a D "battery")
What is the difference between a cell and a battery?
What are the three purposes of electrolysis?
Draw the set-up used to gold plate a spoon. What are the reactions that occur?
Why do each of the following protect iron from rusting: wax, paint, zinc
Why is it better to make a car out of aluminum than iron?