Electrochemical Measurement of Concentration An electrochemical cell consists of a standard hydrogen electrode and a copper...

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Electrochemical Measurement of Concentration An electrochemical cell consists of a standard hydrogen electrode and a copper...

Electrochemical Measurement of Concentration

An electrochemical cell consists of a standard hydrogen electrode and a copper metal electrode.

a) What is the potential of this cell at 25°C if the copper electrode is placed in a solution in which [Cu²⁺] = 7.5×10^-8 M?

b) The copper electrode of the above cell is placed in a solution of unknown [Cu²⁺]. The measured potential at 25°C is 0.109 V. What is [Cu²⁺] (in mol/L)? (Assume Cu²⁺ is reduced.)

c) A calibration curve to show how the cell potential varies with [Cu²⁺] may be constructed. A plot of cell potential (in V, with the same sense as in question 1) versus log₁₀[Cu²⁺] should yield a straight line. What is the slope of this line?

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Answer 1

Answer #1

ue the nernst Cyation ώ Eccu: E.ou+(o.osn/n)tost.«J 1) lo Gy2t 2+7 bhelfort when а се 二0.029 6 V

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Answer 2

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