sheanhung Posted November 12, 2005 Share Posted November 12, 2005 Question: In copper sulfate, there are clearly two modes of binding of hydrated water. What are they? What is the structure of CuSo4.5H2O? Who first determined this structure and how? It is a difficult question for me. Link to comment Share on other sites More sharing options...
vrus Posted November 12, 2005 Share Posted November 12, 2005 The only time when I reffered Copper (II) Sulphate with reference to the Pentahydrate is for Empirical Formula... Link to comment Share on other sites More sharing options...
woelen Posted November 12, 2005 Share Posted November 12, 2005 Question:In copper sulfate' date=' there are clearly two modes of binding of hydrated water. What are they? What is the structure of CuSo4.5H2O? Who first determined this structure and how? It is a difficult question for me. [/quote'] Indeed, there are two modes of binding of water. Four molecules are bound as ligand to the copper ion, one molecule best can be regarded as water of crystallization. A better formula for this compound would be [Cu(H2O)4]SO4 . H2O I do not know, who first determined this structure of the compound. It first was understood in the beginning of the 20th century, when a more thorough understanding of coordination chemistry was developed. A similar compound exists, having formula [Cu(NH3)4]SO4.H2O, in which the four molecules, coordinated to the copper ion are replaced by ammonia, while the water of crystallization remains the same. By this kind of analogies, people have deduced that copper forms tetraaqua complexes. See also this site I found after a simple search on google: http://antoine.frostburg.edu/chem/senese/101/inorganic/faq/blue-vitriol.shtml Lateron, the structure of these compounds has been confirmed with X-ray crystal analysis. Link to comment Share on other sites More sharing options...
Borek Posted November 15, 2005 Share Posted November 15, 2005 Thermogravimetric curves give similar information about water binding. Best, Borek -- Chemical calculators at www.chembuddy.com pH calculator concentration conversion Link to comment Share on other sites More sharing options...
sheanhung Posted November 20, 2005 Author Share Posted November 20, 2005 thank you so much to u all! Finally i finished my report just in time! Link to comment Share on other sites More sharing options...
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