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9.2 Electrochemical cells Cheat Sheet (DRAFT) by

Chemistry HL 9.2 cheat sheet (2016 syllabus)

This is a draft cheat sheet. It is a work in progress and is not finished yet.

Defini­tions

Voltaic cells are devices that convert chemical energy to electrical energy.
Electr­olytic cells are devices that convert electrical energy to chemical energy.
Sponta­neous is something that happens by itself, without external stimulus.
Non-sp­ont­aneous is something that doesn't happen by itself, with external stimulus.
Electr­och­emical cells are devices that convert chemical energy to electrical energy, or electrical energy to chemical energy.
Half-cell is the component of a voltaic cell where either oxidation or reduction occurs.
Anode is the electrode, or half-cell, where oxidation occurs.
Cathode is the electrode or half-cell where reduction occurs.
Salt-b­ridge is a device that connects the anode and cathode in voltaic cell. It contains a concen­trated solution of an unreactive salt and allows ions to flow into the two half-c­ells.
Cell-d­iagram convention is a method for repres­enting the components of a voltaic cell.
Phase boundary is a boundary that exists between components of a cell that are in different phases.
Spectator ions are ions that are present in solution but do not partic­ipate in any reactions.
Closed circuit is a circuit through which current can flow without being interr­upted.
Battery is a device that converts stored chemical energy into electrical energy.
Power source is an electronic device that is a source of electrical energy.
Electr­olyte solution is a solution that contain ions and is able to conduct charge.
Molten is the melted from of a liquid that is only formed at high temper­atures.
Discharged means the substance has been changed by an electr­olysis reaction by losing its charge.
 

Types of electr­och­emical cells

There are two types of electr­och­emical cells, voltaic and galvanic.
Voltaic cell
Uses sponta­neous redox reactions to make electricity.
Converts chemical energy into electrical energy.
Electr­olytic cell
Uses electr­icity to male non-sp­ont­aneous redox reactions happen.
Converts electrical energy into chemical energy.