5 Questions
Define electrical resistance and state its unit of measurement.
Electrical resistance is represented by the symbol ‘R’ and is measured in ohm (Ω).
What is the relationship between the electrical resistance of an object, its length (l), and its area of cross-section (A)?
The electrical resistance of an object is directly proportional to its length (l) and inversely proportional to its area of cross-section (A).
Calculate the standard Gibbs energy for the reaction: 2Fe^3+(aq) + 2I^-(aq) → 2Fe^2+(aq) + I2(s) given E(cell) = 0.236 V.
-0.236 kJ mol^-1
What is the equilibrium constant for the cell reaction when E(cell) = 0.236 V?
K = 1.64
Calculate the potential of a hydrogen electrode in a solution with pH 10.
2.0 V
Test your knowledge on the Nernst equation and equilibrium constant in electrochemistry. This quiz covers the application of the Nernst equation at equilibrium and understanding the relationship between cell potential, concentrations of ions, and equilibrium constant.
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