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The compound Yba2Cu3O7 which shows super...

The compound `Yba_2Cu_3O_7` which shows super conductivity has copper in oxidation state_____. Assume that the rare earth element yttrium is in its usual `+3` oxidation state.

Text Solution

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`YBa_(2)Cu_(3)O_(7)` is neutral (+3) + 2 (+2) + 3 (x) + 7 (-2) = 0 , 3 + 4 + 3x -14 = 0
implies 3x + 7 -14 = 0 or x = +7/3
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