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Specialty Chemistry Forums => Other Sciences Question Forum => Topic started by: constantly asking on March 04, 2006, 08:24:40 AM

Title: 1 of the greatest chemicals-Aluminium-*delete me*
Post by: constantly asking on March 04, 2006, 08:24:40 AM
Aluminium...
ive got to answer a whole load of questions on aluminium...such as why would it be difficult to form an Al ion?
Al(H2O)6 is a common complex of ion in solution. why?
what would happen if NaOH (aq) was added dropwise to a solution of Al(NO3)3 (aq)? write an equation for this....and many more...
can anyone help me?that would be great.. i could then go and eat a trifle without feeling guilty..
thanks
Title: Re:1 of the greatest chemicals-Aluminium-*delete me*
Post by: Albert on March 04, 2006, 08:42:34 AM
Quote from: constantly asking on March 04, 2006, 08:24:40 AM
what would happen if NaOH (aq) was added dropwise to a solution of Al(NO3)3 (aq)?

It yields trihydroxyaluminum Al(OH)3, whose Ksp is very low. While Al(NO3)3 is soluble.
Title: Re:1 of the greatest chemicals-Aluminium-*delete me*
Post by: Borek on March 04, 2006, 09:07:40 AM
Quote from: Albert on March 04, 2006, 08:42:34 AM
It yields trihydroxyaluminum Al(OH)3, whose Ksp is very low. While Al(NO3)3 is soluble.

That's only first half of the story. Al(OH)3 is amphoteric.
Title: Re:1 of the greatest chemicals-Aluminium-*delete me*
Post by: Albert on March 04, 2006, 09:18:07 AM
Oh, yes, indeed. Going on adding OH-, you'll dissolve your precipitate.

For what concerns the other two questions:

- Do you know what Fajans rules are? (for the former)
- Think about the dimension and charge of Al3+, for the latter.
Title: ThAnK yOu!
Post by: constantly asking on March 05, 2006, 04:54:52 AM
Thank you!
Internet is the best thing invented!EVER!!!
 :)