Question

2. A) The mercury electrode is described as an ideally polarizable electrode. Provide an explanation of an ideally polarisable electrode. What are the conditions that cause a mercury electrode to deviate from ideal behaviour? B) Define reference electrode. Provide 3 examples of reference electrodes. C) What transport processes are involved in material arriving at an electrode surface? How do they arise? D) At 298K the following cathodic currents were obtained for the cathodic overpotentials in a solution of FeSO4/Fe2(SO4)3 (both at a concentration of 5 x 10-4 M). The electrode area is 2 cm2. Calculate the transfer coefficienta, the exchange current density Io and give an estimation of the standard rate constant ko. Calculate the current at a cathodic overpotential of 0.025 V. h (V) | 0.05 | 0.07 | 0.10 | 0.12 | 0.15 I (mA) | 9.95 | 17.03 | 35.18 | 55.89 | 110.78

          2. A) The mercury electrode is described as an ideally polarizable electrode. Provide an explanation of an ideally polarisable electrode. What are the conditions that cause a mercury electrode to deviate from ideal behaviour?

B) Define reference electrode. Provide 3 examples of reference electrodes.

C) What transport processes are involved in material arriving at an electrode surface? How do they arise?

D) At 298K the following cathodic currents were obtained for the cathodic overpotentials in a solution of FeSO4/Fe2(SO4)3 (both at a concentration of 5 x 10-4 M). The electrode area is 2 cm2. Calculate the transfer coefficienta, the exchange current density Io and give an estimation of the standard rate constant ko. Calculate the current at a cathodic overpotential of 0.025 V.

h (V) | 0.05 | 0.07 | 0.10 | 0.12 | 0.15
I (mA) | 9.95 | 17.03 | 35.18 | 55.89 | 110.78

2. A) The mercury electrode is described as an ideally polarizable electrode. Provide an explanation of an ideally polarisable electrode. What are the conditions that cause a mercury electrode to deviate from ideal behaviour?

B) Define reference electrode. Provide 3 examples of reference electrodes.

C) What transport processes are involved in material arriving at an electrode surface? How do they arise?

D) At 298K the following cathodic currents were obtained for the cathodic overpotentials in a solution of FeSO4/Fe2(SO4)3 (both at a concentration of 5 x 10-4 M). The electrode area is 2 cm2. Calculate the transfer coefficienta, the exchange current density Io and give an estimation of the standard rate constant ko. Calculate the current at a cathodic overpotential of 0.025 V.

h (V) | 0.05 | 0.07 | 0.10 | 0.12 | 0.15
I (mA) | 9.95 | 17.03 | 35.18 | 55.89 | 110.78

Added by Brian C.

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