Nagwa uses cookies to ensure you get the best experience on our website. Learn more about our Privacy Policy.

Start Practicing

Worksheet: Converting between Cell Potentials and Equilibrium Constants

Q1:

Using the standard electrode potentials in the table below, calculate to 2 significant figures the equilibrium constant at 2 5 ∘ C for a galvanic cell with the overall reaction:

Half-equation S n ( ) + 2 e S n ( ) 2 + – a q s C u ( ) + e C u ( ) 2 + – + a q a q
Standard electrode potential, 𝐸 ⦡ (V) βˆ’ 0 . 1 3 7 5 + 0 . 1 5 3
  • A3.5
  • B 8 . 2 Γ— 1 0 4
  • C 7 . 4 Γ— 1 0 2 3
  • D 6 . 6 Γ— 1 0 9
  • E 6 . 4 Γ— 1 0 5

Q2:

Using the standard electrode potentials in the table, calculate to 2 significant figures the equilibrium constant at 2 5 ∘ C for the reaction:

Half-equation A g ( ) + e A g ( ) + – a q s F e ( ) + 2 e F e ( ) 2 + – a q s
Standard electrode potential, 𝐸 ⦡ (V) +0.7996 βˆ’ 0 . 4 4 7
  • A 1 . 2 Γ— 1 0 2 1
  • B 2 . 0 Γ— 1 0 1 8
  • C 8 . 4 Γ— 1 0 1 0
  • D 1 . 4 Γ— 1 0 4 2
  • E 7 . 2 Γ— 1 0 4 3