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Chemistry Forums for Students => Inorganic Chemistry Forum => Topic started by: afonjealis on May 30, 2010, 04:32:08 PM

Title: a question on Sodium nitrate and sodium hydroxide study
Post by: afonjealis on May 30, 2010, 04:32:08 PM

Hi
I need a liquid chemical which reacts with NaOH and preferably make a colorful chemical compound but I need this chemical to be strictly non-reactive and non-dissolvable to NaNO3.

The reason for this question is I have grown crystals of the combination of 2 salts and I need to study them under microscope, but I need a way to recognize the NaOH in the matrix of NaNO3.

Your help is so appreciated. This is related to my MSC research

Thanks

Title: Re: a question on Sodium nitrate and sodium hydroxide study
Post by: Trave11er on June 27, 2010, 12:10:07 PM

Hello,

I am not sure, but, maybe, this can help you http://en.wikipedia.org/wiki/Antimony_pentafluoride. The idea is that this compound tends to form complex anions with halogens (e.g. http://en.wikipedia.org/wiki/Fluoroantimonic_acid) and "in theory" should react well with OH- ions of NaOH as well to form Na[Sb(OH)F5]. On the other hand it would react poorly with NO3- ions from NaNO3, because the latter are bulky and have their minus charge delocalised more compared to OH- (http://en.wikipedia.org/wiki/Nitrate).