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Why are there 2 SO4 molecules, instead of one in coppersulphate pentahydrate molecule and please explain its structure??

Why are there 2 SO4 molecules, instead of one in coppersulphate pentahydrate molecule and please explain its structure??

Grade:12

1 Answers

Ashutosh Sharma
askIITians Faculty 181 Points
6 years ago
Copper(II) sulfate pentahydrate is a sulfate salt of copper and four of the water molecules are associated with the copper(II) ion, and the fifth is hydrogen-bonded to the sulfate ion as well as to water molecules on the copper(II) ion. Heating changes the blue color to a white color, the color of anhydrous CuSO4.When the water molecules leave the copper ion, the blue color is lost.
Four waters are directly bound to the copper to form a Cu(H2O)42+ion, with the copper at the center of a square formed by the oxygens of the waters. The crystal structure of copper(II) sulfate pentahydrate can be pictured as an array of these Cu(H2O)42+ions bridged by sulfate ions (SO42-) and water molecules, with one sulfate and one water per Cu(H2O)4+2

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