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Chemistry Forums for Students => High School Chemistry Forum => Topic started by: The futuristic on March 27, 2024, 06:02:19 AM

Title: Aluminium Sulphate
Post by: The futuristic on March 27, 2024, 06:02:19 AM

What is the difference between Al2(SO4)3.xH2O and Al2(SO4)3?

There is water molecular being bonded on aluminium sulphate structure?

What will impact on the chemical equation between sulphuric acid and aluminium hydroxide to produce aluminium sulphate?

Title: Re: Aluminium Sulphate
Post by: Hunter2 on March 27, 2024, 08:02:36 AM

Nothing. In aqueous solution you can crystilize the aluminiumsulfate as dodeca hydrate Al2(SO4)3 x 12 H2O.
For the Neutralisation Al3+ and SO4 2- react.

Title: Re: Aluminium Sulphate
Post by: Borek on March 27, 2024, 10:59:06 AM

https://en.wikipedia.org/wiki/Hydrate

Title: Re: Aluminium Sulphate
Post by: The futuristic on March 27, 2024, 08:25:48 PM

if aluminium hydroxide source come from bauxite, then the reaction with sulphuric acid will be
3 H2SO4 + 2 Al(OH)3 + 8 H2O → Al2(SO4)3 ∙ 14 H2O
That means the generated water molecules are crystalized with aluminium sulphate? The water molecules are bonded together with aluminium sulphate molecular structural?
In that sense of chemical and physical properties will be different?

Title: Re: Aluminium Sulphate
Post by: Hunter2 on March 28, 2024, 02:58:09 AM

Chemical is the same, physical its different. But if you treat Aluminiumhydroxide with sulfuric acid you get neutralization and Al3+  and
SO4 2- in solution. Only if you evaporate the water then it will crystalize with 12 water molecules not 14 together.