Question

4. Установите соответствие. 1) CuO + H2SO4 — CuSO4 + H2O. А Присоединения Б Обмена В Замещения Г Разложения 2) 2H2O = 2H2↑ + O2↑ 3) 2Al + 6HCl → 2AlCl3 + 3H2 4) 2H₂ + O₂ → 2H₂O​

Answer 1

Ответ:

1) CuO + H2SO4 — CuSO4 + H2O - В Замещения.

2) 2H2O = 2H2↑ + O2↑ - Г Разложения.

3) 2Al + 6HCl → 2AlCl3 + 3H2 - Б Присоединения.

4) 2H₂ + O₂ → 2H₂O - Б Присоединения.

Answer 2

1) CuO + H2SO4 —> CuSO4 + H2O

The reaction between copper(II) oxide (CuO) and sulfuric acid (H2SO4) results in the formation of copper(II) sulfate (CuSO4) and water (H2O). This is an example of a neutralization reaction where an acid reacts with a base to form a salt and water. [[1]]

2) 2H2O = 2H2↑ + O2↑

The equation represents the decomposition of water (H2O) into hydrogen gas (H2) and oxygen gas (O2) through a process called electrolysis. Electrolysis involves passing an electric current through a substance to break it down into its constituent elements. In this case, the electric current breaks down water molecules into hydrogen and oxygen gases. The upward arrow (↑) indicates the gases are released as products. [[2]]

3) 2Al + 6HCl -> 2AlCl3 + 3H2

The reaction between aluminum (Al) and hydrochloric acid (HCl) results in the formation of aluminum chloride (AlCl3) and hydrogen gas (H2). This is an example of a redox reaction where there is a transfer of electrons between the reactants. Aluminum is oxidized (loses electrons) while hydrogen ions from hydrochloric acid are reduced (gain electrons) to form hydrogen gas. [[3]]

4) 2H₂ + O₂ -> 2H₂O

The equation represents the reaction between hydrogen gas (H2) and oxygen gas (O2) to form water (H2O). This is a combination reaction where two or more substances combine to form a single product. In this case, hydrogen and oxygen gases combine to form water. [[4]]

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