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From the electrochemical series given in...

From the electrochemical series given in the text, determine the approximate value of `E^@` for `X^(2+) (aq)+2e to X(s)`
The metal X dissolves in hydrochloric acid producing `H_2` but does not replace either `Zn^(2+) or Fe^(2+)`.

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`-0.44 V lt E^@ lt 0.00V`
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