Friday, December 18, 2009

Why Sodium Salicylate soluble in water and ethanol, and why is talcum powder insoluble in both?

i have a chemistry assignment to do and i cant seem to find the answers any where. give the reason for why is sodium salicylate (C7H5NaO3) soluble in both water and ethanol but talcum powder is not soluble in both water and ethanol.Why Sodium Salicylate soluble in water and ethanol, and why is talcum powder insoluble in both?
The reason that Sodium salicylate is soluble in Ethanol it is non polar and organic compound and should be soluble in non polar solvents and that is the reason and it is soluble in water because of hydrogen bonding and hydrogen is special kind of bond formed between highly electronegative elements like oxygen , Nitrogen and flourine. It is a special kind of bond. It is hard to explain because I do not know what level of knowledge you have.





Talcum powder(Hydrated Magnesium silicate) in insoluble in Ethanol because it is a polar or ionic compound and it must be soluble in polar solvents like water but rules of solubility.








Salts are build of positive and negative ions which are bound together by the force of attraction of their opposite charges. If energy needed to brake their ionic bonds is lower then the energy given off by an interaction of the ions with a solvent (ie. water), the salts will dissociate and interact with solvent and thus dissolve.





So it does not dissolve in water





Like dissolves in Like


Organic in Organic solvents





Polar in Polar solvents like water , Ammonia, H2S few to name
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