21.1: Electrochemical Cells

...................................................... process is any conversion between chemical energy and electrical energy.

• An electrochemical

• A biochemical

• A geochemical

All electrochemical processes involve redox reactions.

• True

• Flase

Applications that use electrochemical processes to produce electrical energy include:

(Choose 3 answers)

• Dry cells.

• Lead storage batteries.

• Fuel cells.

• Electrical generator

Electrical energy is produced in a voltaic cell by a .......................................... redox reaction within the cell.

• nonspontaneous

• spontaneous

A voltaic cell consists of ............................... half-cells.

• two

• three

• more than four

A typical half-cell consists of a piece of ................... immersed in a solution of its ions.

• metal

• nonmetal

The half-cells are connected by a ......................................., which is a tube containing a strong electrolyte, often potassium sulfate

• metallic wire

• salt bridge

• magnetic bridge

The salt bridge or porous plate .................................. ions to pass from one half-cell to the other but prevents the solutions from mixing completely.

• doesn't allow

• allows

The driving force of such a voltaic cell is the spontaneous .................................... between zinc metal and copper ions in solution.

• combustion reaction

• redox reaction

• decomposition reaction

The electrode at which oxidation occurs is called the .......................................

• anode

• cathode