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Why does the Co³⁺/Co²⁺ couple have such a high reduction potential?

The electronic configuration has nothing to do with it. The reduction potentials of $\ce{Ni^3+}/\ce{Ni^2+}$, $\ce{Cu^3+}/\ce{Cu^2+}$ and $\ce{Zn^3+}/\ce{Zn^2+}$, if they have been/could be measured, ...
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Can carbon dioxide be reduced to carbon monoxide and oxygen to produce energy?

Unfortunately, the question as stated is thermodynamically impossible. Let's look at the proposed reaction: $$\ce{CO2(g) -> CO(g) + O(g)}$$ This reaction is simply a bond dissociation (specifically,...

Why exactly are standard potentials additive?

Following on Derek's great answer, it is very important to remind that the conventional way we use to add half-cell potentials is a consequence of the conservation of energy. Therefore, we should look ...
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Accepted

Cyclic Voltammetry - HOMO and LUMO levels

Yes, you can "convert" this way, but you're correct to be skeptical. Let's start with interpreting the cyclic voltammetry curves themselves. (figure from Wikipedia) Note that the "peak" actually ...
• 27.9k

Can carbon dioxide be reduced to carbon monoxide and oxygen to produce energy?

You’re looking at bond dissociation energies. They, however, do not give a good picture. A better place to start looking is the standard enthalpy of formation. The linked Wikipedia article provides an ...
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Deriving Nernst Equation for a hydrogen-oxygen Fuel cell

Rather than pointing whether the assumptions are correct or incorrect, I will show you a general method to obtain the Nernst's equation for any system. It is a more systematic and formal approach, ...
• 3,546

How to calculate the pH of a redox reaction between nickel(IV) oxide and silver?

For the following reaction: \begin{gather} \ce{NiO2(s) + 4 H+(aq) + 2 Ag(s) -> Ni^2+(aq) + 2 H2O(l) + 2 Ag^+(aq)}\\ E^\circ = \pu{2.48 V} \end{gather} Calculate the $\mathrm{pH}$ of the solution if ...
• 131

Can molten aluminium be used to reduce iron oxide (rust) into iron?

Aluminum can indeed reduce iron oxide, but you may not get iron metal. Aluminum and iron constitute one of many pairs of metals that form intermetallic compounds. Reference [1](https://doi.org/10.1007/...
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Why is standard reduction potential an intensive property?

Basically, Imagine that you have a waterfall that is 100 meters high, and 50 meters long, this scenario makes reduction potential an intensive property: now let's say that you have two of the said ...
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