Dimdims Posted September 26, 2010 Share Posted September 26, 2010 For an investigation i've got to do in A-level Chemistry, i need to make Copper(II) Ammonium sulphate from scratch, could anyone please help me out as to how to do this as i haven't got a clue what to use Link to comment Share on other sites More sharing options...
mississippichem Posted September 26, 2010 Share Posted September 26, 2010 For an investigation i've got to do in A-level Chemistry, i need to make Copper(II) Ammonium sulphate from scratch, could anyone please help me out as to how to do this as i haven't got a clue what to use When you say from scratch, do you mean from anhydrous copper(II) sulphate? If so, just dissolve the copper(II) sulphate in a concentrated aqueous solution of ammonia [also known as ammonium hydroxide]. This should form the complex [ce] [Cu(NH_3 )_4 ] SO_4 [/ce] which is what you were looking for I believe. Link to comment Share on other sites More sharing options...
Dimdims Posted September 26, 2010 Author Share Posted September 26, 2010 no, i first have to make the copper(II) sulphate, but the ammonia should be provided Link to comment Share on other sites More sharing options...
mississippichem Posted September 26, 2010 Share Posted September 26, 2010 no, i first have to make the copper(II) sulphate, but the ammonia should be provided Oh okay. mix a soluble copper salt with a soluble sulfate salt in aqueous solution. Then just play the solubility ballgame to make your copper sulfate percipitate out, or get the other compound to percipitate out and evaporate the solution to dryness. Link to comment Share on other sites More sharing options...
Dimdims Posted September 26, 2010 Author Share Posted September 26, 2010 ok, thanks for the help Link to comment Share on other sites More sharing options...
John Cuthber Posted September 26, 2010 Share Posted September 26, 2010 (edited) First off, you need to find out exactly what you are being asked to make. Is it the double salt CuSO4 (NH4)2SO4. 6H2O or is it tetrammine copper (II) sulphate Cu(NH3) 4SO4 .H2O ( I think it's the monohydrate.) I think it's probably the second, but the question actually asks for the first. Edited September 26, 2010 by John Cuthber Link to comment Share on other sites More sharing options...
Dimdims Posted September 27, 2010 Author Share Posted September 27, 2010 i have to make the double salt, i just wasnt sure how to make it Link to comment Share on other sites More sharing options...
John Cuthber Posted September 27, 2010 Share Posted September 27, 2010 Then you need to prepare solutions of ammonium sulphate and copper sulphate, mix them and let the water evaporate. Link to comment Share on other sites More sharing options...
mississippichem Posted September 27, 2010 Share Posted September 27, 2010 Oh sorry, I assumed you were trying to get the tetra-ammine complex. Where's the IUPAC when you need them? Link to comment Share on other sites More sharing options...
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