When performing a Sodium Iodide in Acetone test, why is it SO important that the test tube is so dry?
Q. When performing a Sodium Iodide in Acetone test, why is it SO important that the test tube is so dry?
Asked by Breiner2288 - Thu Apr 17 14:49:02 2008 - - 1 Answers - 0 Comments

A. the idea of the experiment is that you react KI with an organic bromide or chloride and halogen exchanges so instead of KI , KCl or KBr forms in the solution. They are not soluble in acetone unlike KI, and so they precipitate. However as you may guess they are soluble in water, so if your test tube is not dry, you may have a false negative result even if KCl or KBr does form!
Answered by Anatol - Thu Apr 17 15:21:47 2008

How to use an 'aqueous solution' of bromine to distinguish between Sodium Chloride & Sodium Iodide ?
Q. Hey, Anyone have any ideas on this question :/ I'm really stuck. But whoever answers can you make it understandable, i want to understand it before i write it down. Thanks [:
Asked by L a L a L a . - Tue Apr 21 09:21:15 2009 - - 1 Answers - 0 Comments

A. If you mix aqueous bromine with a chloride solution, nothing happens; the solution will stay red. If you mix aqueous bromine with an iodide solution, the bromine will oxidise the iodide to iodine, while being reduced to bromide. Br2(aq) + 2I-(aq) 2Br-(aq) + I2(aq) This will give a brown colour.
Answered by kumorifox - Tue Apr 21 09:29:39 2009

Sodium Chloride and Sodium Iodide?
Q. How could you distinguish sodium chloride (table salt) from sodium iodide ( a poison ) ??
Asked by Litoallie - Mon Apr 16 01:57:04 2007 - - 3 Answers - 0 Comments

A. Sodium Iodide is Hygroscopic (absobs atmospheric moisture), whereas Sodium Chloride is not Hygroscopic. By the way, Sodium Iodide is used in treatment of Iodine deficiency and is not poisonous in small amounts.
Answered by Tiger Tracks - Mon Apr 16 02:08:18 2007