What half cell is oxidised?

The half cell with the lowest Ecell value.

What is standard electrode potential?

The maximal electromotive force of a half cell compared with a standard hydrogen cell.

A 1moldm-3 solution of H+ ions with 100kPa H2 gas and a platinum electrode at 298K. With an Ecell value of 0.

High activation energy- slower rate.If solutions are non standard concentration equilibrium will be shifted, so rate may be different.

Non rechargeable cells. Chemicals used up and voltage falls.

Rechargeable cells. The reaction can be reversed for recharging.

Fuel and oxygen enter the cell, products flow out. The electrolyte remains in. They can operate continuously and don't need recharging.

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by Samkimber1, Mar. 2019

Subjects: Chemistry

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	What half cell is oxidised?	The half cell with the lowest Ecell value.
	What is standard electrode potential?	The maximal electromotive force of a half cell compared with a standard hydrogen cell.
	What is a standard hydrogen cell?	A 1moldm-3 solution of H+ ions with 100kPa H2 gas and a platinum electrode at 298K. With an Ecell value of 0.
	Limitations of predictions using Ecell values:	High activation energy- slower rate. If solutions are non standard concentration equilibrium will be shifted, so rate may be different.
	What is a primary cell?	Non rechargeable cells. Chemicals used up and voltage falls.
	What is a secondary cell?	Rechargeable cells. The reaction can be reversed for recharging.
	What is a fuel cell?	Fuel and oxygen enter the cell, products flow out. The electrolyte remains in. They can operate continuously and don't need recharging.