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.

Question

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?

Answer 1

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?

Answer 2

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