Tuesday, October 9, 2018

inorganic chemistry - Reaction of aluminium trichloride with water


Since AlX3+ is an acidic cation, shouldn't it react with water like this? AlClX3+6HX2O[Al(HX2O)X6]X3++3ClX[Al(HX2O)X6]X3++HX2O[Al(HX2O)X5(OH)]X2++HX3OX+[Al(HX2O)X5(OH)]X2++HX2O[Al(HX2O)X4(OH)X2]X++HX3OX+[Al(HX2O)X4(OH)X2]X++HX2O[Al(HX2O)X3(OH)X3](s)+HX3OX+


The 3rd step of the equilibrium rarely happens in water. But if we add a base, strong or not (NaOH, or NaX2S) the equilibrium weighs to the right and Al(OH)X3 is formed.


But I've seen people write it as this. AlClX3+3HX2OAl(OH)X3+3HCl Is this correct? I need a certain answer.




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