vickymouse Posted December 3, 2010 Share Posted December 3, 2010 1. Write a balanced chemical equation to represent the reaction between iodine and propanone in acidic medium. 2. Explain why the concentration of iodine in the reaction mixture can be expressed in terms of the volume of sodium thiosulphate added. 3. Does iodine take part in the rate determining step of the reaction between iodine and propanone? Thanks a lots! Link to comment Share on other sites More sharing options...
John Cuthber Posted December 3, 2010 Share Posted December 3, 2010 Well, the first step is to find out what the products are. Do you know that? Link to comment Share on other sites More sharing options...
vickymouse Posted December 4, 2010 Author Share Posted December 4, 2010 Is it I ion? P.S. My chemistry is really poor..(but also my English..).. I come from Hong Kong.. Link to comment Share on other sites More sharing options...
John Cuthber Posted December 4, 2010 Share Posted December 4, 2010 The iodide ion is one product. Do you know what the other product or products are? You need to know all of them to write a balanced equation. Link to comment Share on other sites More sharing options...
mississippichem Posted December 4, 2010 Share Posted December 4, 2010 (edited) You should look up [math]\alpha[/math]-halogenation of ketones. This is a fairly common reaction. Depending on what level chemistry student you are, you might need some information on tautomers to make sense of how the product formed. Edited December 4, 2010 by mississippichem Link to comment Share on other sites More sharing options...
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