Description of experiment
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Needed compounds:
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copper nitrate : Cu(NO3)2 . 3H2O
thionyl chloride : OSCl2
Class:
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elem=N,S,Cl,Cu
acid/base
redox
Summary:
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Thionyl chloride and copper nitrate react with each other, giving gaseous
products and solid anhydrous copper(II) chloride remains behind.
Description:
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Add half a ml of thionyl chloride to a spatula full of copper nitrate: Bubbles
of gas are produced at the solid, and some compound dissolves in the thionyl
chloride. It gets red/brown, but remains clear. The reaction takes a few
minutes. After the reaction, only some brown solid remains, slightly wetted
with some excess thionyl chloride.
The gas produced in the reaction is colorless and heavily fumes when in contact
with air.
Heat the contents of the test tube a little bit: The last remains of thionyl
chloride evaporates and only a brown dry solid remains.
Add some water to the brown solid: The solid becomes green at once.
Add more water: The solid dissolves, giving a green solution. On addition of
much more water, the solution becomes blue.