Homework Help: chemistry

Posted by its me on Sunday, June 6, 2010 at 2:47am.

The electrochemical cell described by the balanced chemical reaction has a standard emf (electromotive force) of 0.27 V. Calculate the equilibrium constant (Kc) for the reaction at 298 K. Round your answer to 3 significant figures.

H2O2(aq) + 2ClO2(g) → O2(g) + 2HClO2(aq)

i always do this problem wrong because i can never find the right n
and you use -RTlnK=-nFE0cell right?

chemistry - DrBob222, Sunday, June 6, 2010 at 1:28pm
H2O2(aq) + 2ClO2(g) → O2(g) + 2HClO2(aq)

O2 in H2O2 on the left is -2 for both O atoms. On the right O2 is zero. Loss of 2e.
2Cl on the left are +8 an on the right 2Cl in HClO2 are +6. Gain of 2e.
n must be 2, right?
chemistry - its me, Sunday, June 6, 2010 at 6:51pm
thank you Dr. Bob222, i dont know how you manage to answer everyone's questions but you are one amazing person :)

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