electrochemistry Flashcards
1
Q
what can a voltmeter measure in an electrochemical cell
A
voltmeter needs to be of infinite resistance, you can measure the “potential” of the cell
2
Q
what will the difference in reactivity produce on the voltmeter
A
larger the difference in reactivity the larger the reading on the voltmeter
3
Q
what is an electrochemical cell made of
A
2 half cells
4
Q
how do we determine the potential of 1 half-cell?
A
we must compare it to a standard. (standard hydrogen electrode)
5
Q
the standard hydrogen electrode
conditions
A
- temp 298k
- pressure at 100kPa
- conc [H+] 1moldm-3
6
Q
what is the convention rule with S.H.E
A
to draw the standard hydrogen electrode on the left hand side of the cell
7
Q
what is the potential for the S.H.E
A
As it is the standard, it is 0.00v
