avanichem1 Posted February 12, 2009 Posted February 12, 2009 how to manking of potassium iodate from iodine
hermanntrude Posted February 12, 2009 Posted February 12, 2009 manking? i'm sorry i don't understand your question.
vedmecum Posted February 12, 2009 Posted February 12, 2009 i think your ques is how to make potassium iodate from iodine ? put KI in iodine sol. and leave it for half an hour in an open environment . atmospheric oxygen oxidises iodine to its iodate.
UC Posted February 13, 2009 Posted February 13, 2009 i think your ques is how to make potassium iodate from iodine ? put KI in iodine sol. and leave it for half an hour in an open environment . atmospheric oxygen oxidises iodine to its iodate. No it doesn't. You'll just evaporate a lot of iodine... Heating with concentrated nitric acid is the standard I believe. Bromates or chlorates dissolved in dilute H2SO4 or HNO3 also oxidize elemental iodine to iodates. Bubbling chlorine through I2 in water will give iodates and eventually periodates. Woelen has some experiments on this. It can also be done electrolytically, but I don't think this is as efficient as for bromates or chlorates.
nitric Posted February 13, 2009 Posted February 13, 2009 i would think it is easier to electrolysis a KI solution(like for making chlorate/perchlorate) with a dash of dichromate, but to make it from KI and I2 i would think heating with a strong aqueous oxidizer would do
vedmecum Posted February 13, 2009 Posted February 13, 2009 that is why i prefer to add KI (excess) . this increase the solubility of iodine in sol. and the loss of iodine will be minimized . if you perform the same in high light intensity , then you need not to put your sol. for more than 10-15 min .
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