Topic 14 Flashcards
1
Q
Why is platinum used in the electrochemical cells?
A
Platinum is inert and therefore very unreactive - will not interfere with the reaction
2
Q
What his meant by the overall Emf being positive?
A
Reaction is spontaneous and favourable
3
Q
What is the Salt bridge made of and its purpose?
A
Potassium Nitrate (KNO3)
Is soluble and can readjust the ion balance
4
Q
Limitations calculating both standard cell potential an SHE in terms of feasibility
A
Does not take into account the kinetics of the reaction
Even if a reaction is feasible may take place at a very slow rate.
5
Q
Conditions for standard electrode potential
A
100kPa
298K
1.0moldm-3
