Redox Reactions series

Comprehensive 9-part series exploring the chemistry of both galvanic and electrolytic cells, and their many important applications.

Ideal for individual student use (followed up with the detailed worksheets) – leaving more  classroom time for discussion of problems!

Unit 2  VCE Chemistry (Vic.)

An introduction to Redox reactions  26 min
Explains the essential features of redox reactions and their importance both in nature and in industry.
Outlines the concepts of paired half-reactions and the ‘oxidation number’ system – and why oxidation numbers are so useful.

Electrochemical Cells (basic version)  26 min
Explains how a Daniell cell works, including energy conversions involved. Outlines the contributions of Daniell, Volta and Galvani to electrochemistry. Explains the Activity Series of Metals and how it can be used.

20 min
Explores the redox chemistry of corrosion in iron and other reactive metals. Identifies important factors affecting corrosion rates.  Explores common forms of corrosion protection: surface coating (including electroplating), and electrochemical protection (both ‘sacrificial’ and cathodic).

Unit 4  VCE Chemistry (Vic.)

Electrochemical Cells  (advanced version)  25 min
Reviews basic redox chemistry principles, including energy conversion in the Daniell cell.
We see how a galvanic cell is constructed and tested, and how you develop half-cell equations.
The electrochemical series is explained: what it is, its uses, and the limitations of predictions based on the series.

Cells and batteries 1:  single-use cells 
22 min
Traces the development of primary cells from the Daniell cell to zinc-carbon dry cells, alkaline cells, button cells and lithium metal cells. The essentials of their chemistry and construction are outlined, as well as the advantages and limitations of each format. The program also reviews the concepts of power, voltage and current, as well as the difference between a cell and a battery, and between cells in series and parallel.

Cells and batteries 2:  rechargeable cells 
20 min
Explores the chemistry and construction of major rechargeable formats: lead-acid, nickel-cadmium, nickel-metal hydride and lithium-ion. Spiral cell construction is explained. The program also explores the use of battery power in electric cars.

Fuel cells   26 min
Outlines the basic chemistry and construction of fuel cells, tracing their development from the alkaline fuel cells vital to the US Space program to more recent formats used in transport and stationary power applications (including Combined Heat and Power systems).  Their potential to power portable electronic devices is also explored.

Electrolytic cells 1:  electroplating 
22 min
This program contrasts energy conversions in electrolytic and galvanic cells, then explores electroplating applications of electrolytic cells – including copper electro-refining – and the concept of competition at electrodes.  The related process of anodising is outlined. Faraday’s laws of electrolysis are explained, then applied to practical electroplating calculations.

Electrolytic cells 2:  chemical production 
20 min
Explains how electrolytic cells are used to produce materials widely used in industry. The chemistry and basic operation of the following processes are explored: aluminium smelting;  sodium production (using the Downs cell); chlorine and NaOH production (using the membrane cell).  Using Faraday’s laws of electrolysis, calculations for both aluminium and sodium production are demonstrated.

Teacher Notes
Year Levels
Upper Secondary to Tertiary
Format DVD
Duration 20 – 25  min
Year produced
2010 – 2011
Single program:           $125 incl gst (+$8 p&h)
Any two programs:       $210 incl gst (+$8 p&h)
Any three programs:     $290 incl gst(+$8 p&h)
Full series:                   $590  incl gst(+$8 p&h)
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