blended - electrochemical cells Flashcards
1
Q
what are the 3 different types of half cell
A
- the metal half cell
- the solution half cell
- the gas half cell
2
Q
what is the metal half cell electrode made of
A
metal dipped into a 1moldm⁻³ solution.
3
Q
give an example of the metal electrode + solution
A
half cell:
Zn²⁺ + 2e⁻ –>Zn
soulution:
Zn²⁺
4
Q
what is the solution half cell electrode
A
platinum
5
Q
what is the solution used in solution half cell made of
A
equal Fe²⁺ and Fe³⁺(1moldm³)
Fe²⁺—>Fe³⁺
6
Q
what conditions are used for the gas half cell
A
298K
1 atm
7
Q
what is the chlorine/chlorine gas half equation
A
Cl₂–>2Cl⁻
8
Q
what is the equation for standard hydrogen electrode
A
2H⁺ + 2e⁻ –> H₂
9
Q
equation for the dichromate(VI)/chromium(III
A
Cr₂O₇²⁻ + 14H⁺ + 6e⁻ –> 2Cr³⁺ + 7H₂O
