AlCl3 forms...

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Gabrielle Schwab 1G
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Joined: Fri Sep 25, 2015 3:00 am

AlCl3 forms...

Postby Gabrielle Schwab 1G » Sat Nov 28, 2015 3:43 pm

How would I know that AlCl3 would form Al(H2O)5OH2+ instead of Al(OH)3?
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Re: AlCl3 forms...

Postby Chem_Mod » Sat Nov 28, 2015 4:06 pm

AlCl3 dissolves in water to form Al3+ which then complexes with water to form ions, [Al(H2O)6]3+. This is because Al3+ is a lewis acid and thus an electron acceptor (accepts electrons from oxygen in water). [Al(H2O)6]3+ can then release protons, thus making the surrounding solution acidic, to lower its charge, yielding [Al(H20)5OH]2+.
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