unit 11 Flashcards
(7 cards)
1
Q
What is a galvanic cell?
A
Converts chemical energy into electrical energy when a chemical reaction happens in the cell
2
Q
for a reaction to be spontaneous what should Gibbs be?
A
Negative
3
Q
What is helmholts double layer?
A
The fact that because the metal will attract ions to otself the solution around the rod will be the opposite
4
Q
What do you use as a standard for voltage
A
SHE
standard hydrogen electrode
it has a standard emf of 0V
5
Q
How do you work out emf of a cell?
A
cathode - anode
6
Q
what does most negative electrode (emf) mean?
A
reducing
7
Q
What is a salt bridge used for?
A
Maintain electrical neutrality to allow the reaction to keep going so pushes some electrons back
