White powder of copper sulfate

An experience. We put a white powder in a dry chemical beaker and show the spectators its color. Then pour a little hot water into the glass. The water is then colored blue.

In order to obtain such an effect, it is necessary first to gently fry, stirring, the blue crystals of copper sulfate. In this case, they turn into white powder of copper sulfate

In order to obtain such an effect, it is necessary first to gently fry, stirring, the blue crystals of copper sulfate. In this case, they turn into white powder of copper sulfate. Interacting with water, the white powder turns blue again and forms a blue solution.

Using anhydrous copper sulfate, alcohol is tested for presence of water, which is an undesirable impurity. If there is water anhydrous copper vitriol absorbs it and turns blue.

The toxicity of copper sulfate for warm-blooded animals is relatively low, at the same time it is highly toxic to fish. Has disinfectant, antiseptic, astringent properties. It is used in medicine, in plant growing as an antiseptic, fungicide or copper-sulfur fertilizer.

In industry, contaminated copper sulfate (2) is obtained by dissolving copper and copper waste in dilute sulfuric acid H2SO4 while blowing air.

2Cu + O2 + 2H2SO4 = 2CuSO4 + 2H2O.

In the laboratory, copper sulfate CuSO4 can be obtained by the action of concentrated sulfuric acid on copper upon heating:

Cu + 2H2SO4 = CuSO4 + SO2 + 2H2O.

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