Electrochemical series and reaction spontaneity (Higher reduction potential species oxidises the one below; positive E°cell ⇒ spontaneous)

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Higher reduction potential species oxidises the one below; positive E°cell ⇒ spontaneous cell

What each symbol means

SymbolWhat it stands for
E^\circStandard reduction potential (SHE scale)

When to use this

Standard conditions; compare reductions — stronger oxidising agent has higher E°.