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If the equilibrium constant for the reac...

If the equilibrium constant for the reaction `H^+(aq)+OH^-)(aq)iffH_2O(l)` is `10^13` at certain temperature then what is the `E^(@)` for the reaction, `2H_2O(l)+2e^-)iffH_2(g)+2OH^(-)(aq)`

A

4.74V

B

-0.858V

C

4.37V

D

1.09V

Text Solution

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The correct Answer is:
B
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Knowledge Check

  • i) H_3PO_(4(aq)) iff H^ _(aq)+ H_2PO_(4(aq))^- ii) H_2PO_(4(aq))^- iff H^ +(aq)+ H_2PO_(4(aq))^(2-) . iii) H_2PO_(4(aq))^(2-) iff H^ +(aq)+ PO_(4(aq))^(3-) . The equilibrium constantsfor the above reactions at a certain temperature are K_1, K_2 and K_3 respectively. The equilibrium constant for the reaction. H_3PO_4(aq) iff 3H^ +(aq)+ PO_(4(aq))^(3-) in terms K_1, K_2 and K_3 is

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