Testing+of+OA+&+RA

Now that we have completed all definitions of redox, it is time to put all the knowledge into use. at this point, i make the assumption that you are able to identify the roles of OA and RA theoretically.

In the practical laboratory, certain tests have to be conducted to identify them. Actually you already have the knowledge on how to use OA and RA back in Secondary Three. Do you recall the test of the presence of sulfur dioxide?

Sulfur dioxide is a pungent and colourless gas. by putting a piece of paper damned with potassium dichromate(VI) solution, the colour of potassium dichromate turns from orange to green. So what role is sulfur dioxide playing?

Click on the following adobe presenter on "Testing of OA & RA".



or you can also read more about OA & RA with this link. [|http://chemed.chem.purdue.edu/genchem/topicreview/bp/ch19/oxred_3.php#agents]

Now that we have come to the end of the lesson, click [|here] to download a free version of EDRAW MIND MAP ENGLISH VERSION(freeware). You can consolidate what you have learnt using a mind map. Hope you have enjoyed this lesson package. Thank You.