There are substances: CaO, H2SO4, H2O, Al (OH) 2, CuO, it is necessary to extract three simple

| July 2, 2021 | education

There are substances: CaO, H2SO4, H2O, Al (OH) 2, CuO, it is necessary to extract three simple and six complex substances from them.

We are given substances, calcium oxide, chemical formula CaO, sulfuric acid, chemical formula H2SO4, water H2O, aluminum hydroxide, chemical formula Al (OH) 2, copper oxide, chemical formula CuO. We need to get three simple substances, for this we need to carry out the reaction of dissociation of these substances into simple ones. For example, let’s take water and decompose into hydrogen and oxygen.

2 H2O = 2 H2 + O2

Copper oxide decomposes into pure copper and oxygen when exposed to temperature.

2 CuO = 2 Cu + О2

Calcium oxide decomposes into calcium and oxygen when exposed to temperature

2 CaO = 2 Ca + O2.

Get complex substances:

Decomposition of aluminum hydroxide into trivalent aluminum oxide and hydrogen, under the influence of temperature.

2 Al (OH) 2 = Al2O3 + 2 H2

Calcium oxide reacts with sulfuric acid to form calcium sulfate salt and water.

CaO + H2SO4 = CaSO4 + H2O

Similarly with copper oxide, we get a copper sulfate salt.

CuO + H2SO4 = CuSO4 + H2O

Interaction of calcium oxide with water and obtaining calcium hydroxide.

CaO + H2O = Ca (OH) 2

Obtaining divalent calcium aluminate.

CaO + Al2O3 = Ca (AlO2) 2

Obtaining tetrahydroxoaluminate of trivalent calcium by fusion.

Ca (OH) 2 + 2 Al (OH) 3 = Ca (Al (OH) 4) 2.



One of the components of a person's success in our time is receiving modern high-quality education, mastering the knowledge, skills and abilities necessary for life in society. A person today needs to study almost all his life, mastering everything new and new, acquiring the necessary professional qualities.