Question

Перепишите приведенные ниже схемы реакций,вместо знаков вопроса напишите формулы соответствующих веществ ,расставьте коэффициенты и поясните,к какому типу относится каждая из указанных реакций: Zn+?--->ZnO Mg+HCl--->MgCl2+ ? Au2O3--->Au+? Al+CuCl2--->Cu+?

Answer 1

2Zn + O2 = 2ZnO ( соединение)

Mg + 2HCl = MgCl2 + H2  ( замещение)

2Au2O3 = 4Au + 3O2 ( разложение)

2Al + 3CuCl2 = 2AlCl3 + 3Cu ( замещение)

Answer 2

Reaction 1: Zn ? ---> ZnO

The given reaction involves the conversion of zinc (Zn) to zinc oxide (ZnO). To balance the equation, we need to determine the coefficients for each substance.

The balanced equation for this reaction is:

Zn + O2 ---> ZnO

Explanation: - Zinc (Zn) is a reactant, and it is being oxidized to form zinc oxide (ZnO). - Oxygen (O2) is the oxidizing agent in this reaction, which combines with zinc to form zinc oxide. - The coefficient for zinc (Zn) is 2, and the coefficient for oxygen (O2) is 1 to balance the equation.

Reaction 2: Mg + HCl ---> MgCl2 + ?

The given reaction involves the reaction between magnesium (Mg) and hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and an unknown product. To balance the equation, we need to determine the coefficients for each substance.

The balanced equation for this reaction is:

Mg + 2HCl ---> MgCl2 + H2

Explanation: - Magnesium (Mg) reacts with hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and hydrogen gas (H2). - The coefficient for magnesium (Mg) is 1, the coefficient for hydrochloric acid (HCl) is 2, the coefficient for magnesium chloride (MgCl2) is 1, and the coefficient for hydrogen gas (H2) is 1 to balance the equation.

Reaction 3: Au2O3 ---> Au + ?

The given reaction involves the decomposition of gold(III) oxide (Au2O3) to form gold (Au) and an unknown product. To balance the equation, we need to determine the coefficients for each substance.

The balanced equation for this reaction is:

2Au2O3 ---> 4Au + 3O2

Explanation: - Gold(III) oxide (Au2O3) decomposes to form gold (Au) and oxygen gas (O2). - The coefficient for gold(III) oxide (Au2O3) is 2, the coefficient for gold (Au) is 4, and the coefficient for oxygen gas (O2) is 3 to balance the equation.

Reaction 4: Al + CuCl2 ---> Cu + ?

The given reaction involves the displacement of copper (Cu) from copper chloride (CuCl2) by aluminum (Al). To balance the equation, we need to determine the coefficients for each substance.

The balanced equation for this reaction is:

2Al + 3CuCl2 ---> 3Cu + 2AlCl3

Explanation: - Aluminum (Al) reacts with copper chloride (CuCl2) to form copper (Cu) and aluminum chloride (AlCl3). - The coefficient for aluminum (Al) is 2, the coefficient for copper chloride (CuCl2) is 3, the coefficient for copper (Cu) is 3, and the coefficient for aluminum chloride (AlCl3) is 2 to balance the equation.

Each of the reactions can be classified as follows: - Reaction 1: Combination reaction (Zinc combines with oxygen to form zinc oxide). - Reaction 2: Single displacement reaction (Magnesium displaces hydrogen from hydrochloric acid). - Reaction 3: Decomposition reaction (Gold(III) oxide decomposes into gold and oxygen). - Reaction 4: Single displacement reaction (Aluminum displaces copper from copper chloride).