Page 22 - Pharmaceutical Analytical Chemistry II - Pharm D- 02-06-07102

• Calculate Ecell under the conditions of 0.20 M Fe2+, others
are at standard conditions

- An electrolytic cell is composed of the following two

electrodes: E0 Fe3+ /Fe
Fe3+ + e → Fe E0 ClO3– /ClO2–
= – 0.04 V
ClO3– + H+ + e → ClO2– + H2O
= +0.35 V

Write the cathode reaction (balanced equation)

Write the anode reaction (balanced equation)

Calculate the potential of ClO3– / ClO2– electrode when [ClO3–] = 0.2
M, [ClO2–] = 0.1 M and [H+] = 1.0 M.

Calculate the potential of Fe3+ / Fe electrode when [Fe3+] = 0.01 M and
[H+] = 1.0 M

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