5 Questions
What is the equation for the equilibrium deposition potential?
$e_{eqm} = e_o + rac{ln C}{Z F}$
What extra voltage should be added in cases where the equilibrium deposition potential is not sufficient to start the reaction?
$e_{act} = e_{eqm} + \eta_{a}$
What reaction step results in activation polarization?
$M+2 + 2e \rightarrow M$
Which factor affects activation polarization according to Tafel's findings?
Current density; $\eta_a = a + b log i$
In which processes does activation polarization (slow) appear more pronounced?
Electrodeposition and electro dissolution of metals such as Fe, Ni, Co, and discharge of gases such as H2, O2, and Cl2.
This quiz discusses the concept of activation (chemical) polarization in the context of metal deposition from a solution containing its ions. It covers the equilibrium deposition potential and the additional voltage required to initiate the reaction.
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