Electrochemistry Flashcards
0
Q
Conditions for the standard hydrogen electrode
A
298K
1 mol dm^-3 with respect to H+
1 atmosphere pressure
Platinum
1
Q
Define the STANDARD ELECTRODE POTENTIAL
A
The potential difference of a cell when the electrode is connected to the standard hydrogen electrode under standard conditions
2
Q
Why do use platinum in standard hydrogen electrode?
A
You need an inert metal to get the electrons in/out without reacting
3
Q
What is a salt bridge?
A
Paper or gelatin saturated in an ionic compound e.g. KNO3
Completes the circuit in a cell, when measuring the standard electrode potentials.
Allows ions to be transferred between the half cells. Does not react with either half cell solutions
4
Q
The electropotential of a half cell indicates…
A
It’s tendency to lose or gain electrons
