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Valency and Oxidation States

Why lithium h...

Question

Why lithium has the highest reducing nature in aqueous solution wherease normally in air it has lowest reducing nature?

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Solution

In aqueous solution, lithium form lithium ions. In aqueous solution, lithium has highest reducing nature. This is probably due to high hydration energy of small lithium ion, which compensates for high ionization energy. While in gas phase, lithium is not present in ions. So has lowest reducing nature.

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Q. Which of the following has the highest reducing nature among the following?

A s_{2} O_{3}, B i_{2} O_{3}, A s_{2} O_{5}, B i_{2} O_{5}

Q. The fact that Li has maximum reducing nature is due to its maximum positive standard reduction electrode potential value which is actually in aqueous solution:

M^{+} (a q) + e^{-} \to M (s)

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Answer whether the above statement is true or false.
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How do you account for the strong reducing power of lithium in aqueous solution?

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