ammonium alum
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ammonium alum
Hi I wonder if anyone can help me and give me the reactions of formation of ammonium alum thanks.
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Re: ammonium alum
Ammonium aluminium sulfate is produced from ammonium sulfate, aluminium(III) hydroxide, and sulfuric acid:skinmsn wrote:Hi I wonder if anyone can help me and give me the reactions of formation of ammonium alum thanks.
1 (NH4)2SO4 + 2 Al(OH)3 + 3 H2SO4 => 2 (NH4)Al(SO4)2 + 6 H2O
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The same principle applies. You'll also require sulfuric acid to balance the sulfate anions with ammonium and aluminium cations; and to neutralise the hydroxide anions.
Al2(SO4)3 + 2 NH4OH + H2SO4 => 2 NH4Al(SO4)2 + 2 H2O
Or equivalently: (Since NH3 + H2O = NH4OH.)
Al2(SO4)3 + 2 NH3 + H2SO4 => 2 NH4Al(SO4)2
Well, that's the overall equation. Of course, you might actually want to do it in a two step process. First, produce ammonia sulfate by exposing hot sulfuric acid to ammonia gas. Then mix the product with aluminium sulfate as suggested above.
Al2(SO4)3 + 2 NH4OH + H2SO4 => 2 NH4Al(SO4)2 + 2 H2O
Or equivalently: (Since NH3 + H2O = NH4OH.)
Al2(SO4)3 + 2 NH3 + H2SO4 => 2 NH4Al(SO4)2
Well, that's the overall equation. Of course, you might actually want to do it in a two step process. First, produce ammonia sulfate by exposing hot sulfuric acid to ammonia gas. Then mix the product with aluminium sulfate as suggested above.