In order to characterize cytochrome its onto an electrode to measure the electro

Question

In order to characterize cytochrome its onto an electrode to measure the electro chemistry to determine how much of the couch Rome has been deposited on the surface of the electrode, the charge is measured. How many picomoles of cytochrome per square centimeter use deposited in alone-electron redox reaction at a 0.32 cm^2 electrode? A] 22 p mol cm^-2 B] 11 p mol cm^-2 C] 9.5 p mol cm^2 D]3.6 mol cm^-2 A cell was prepared by dipping a zn wire and a saturated calomel electrode (E 0.241 V) into 0.101 M zn son solution. The zn wire was attached to the positive terminal of potentiometer and the calomel electrode was attached to the negative terminal calculate the cell potential given the in from action A] -1.032 V B] - 0.974 V C] -0.821 V D] -0.791 V

Explanation / Answer

(31)

E = (Eind - Eref) - 0.05916/n * log[1/[Zn]

The calomel is the reference electrode. Zn is in 2+ state, so n=2.

E = (-0.762-0.241) - 0.05916/2 * log(1/0.1) = -1.03258 V

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