Description of experiment
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Needed compounds:
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ammonium thiocyanate : NH4SCN
ethyl acetate : CH3C(O)OCH2CH3
cupric chloride dihydrate : CuCl2 . 2H2O
Class:
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elem=Cu
coordination
Summary:
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Copper (II) chloride dihydrate dissolves in ethyl acetate, albeit only
in small amounts. With thiocyanate, a dark coordination complex is formed,
also in ethyl acetate.
Description:
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Add some solid copper chloride dihydrate to ethyl acetate and shake: Only a
small part of the solid dissolves. The liquid becomes light yellow/brown.
Add a small amount of NH4SCN: The solid slowly dissolves. The liquid becomes
darker. Its color shift from yellow/brown to red/brown.
Add a lot of water: All solid dissolves, but the water becomes very turbid.
A grey/green precipitate is formed.