Question

Складіть рівняння реакцій,за допомогою яких можна здійснити такі перетворення: Zn → ZnCl2 → Zn(OH)2 → Na2ZnO2 .

Answer 1

Ответ:

4Zn + 2O₂ → 4ZnO

ZnO + 2HNO₃ → H₂O + Zn(NO₃)₂

Zn(NO₃)₂ + 2NaOH → 2NaNO₃ + Zn(OH)₂

Zn(OH)₂ + CaCl₂ → Ca(OH)₂ + ZnCl₂

ZnCl₂ + 2LiOH → 2LiCl + Zn(OH)₂

2NaOH + ZnOH →(сплавление) Na₂ZnO₂ + H₂O

Помни: чтобы получить готовый продукт, нужно меньшее соединять с большим по ряду активности металлов.

Answer 2

Equations for the given transformations:

To represent the given transformations, we need to write the balanced chemical equations for each step. Let's break down the transformations step by step:

1. Zn → ZnCl2: - Zinc (Zn) reacts with chlorine (Cl2) to form zinc chloride (ZnCl2). - The balanced equation for this reaction is: Zn + Cl2 → ZnCl2.

2. ZnCl2 → Zn(OH)2: - Zinc chloride (ZnCl2) reacts with water (H2O) to form zinc hydroxide (Zn(OH)2). - The balanced equation for this reaction is: ZnCl2 + 2H2O → Zn(OH)2 + 2HCl.

3. Zn(OH)2 → Na2ZnO2: - Zinc hydroxide (Zn(OH)2) reacts with sodium hydroxide (NaOH) to form sodium zincate (Na2ZnO2). - The balanced equation for this reaction is: Zn(OH)2 + 2NaOH → Na2ZnO2 + 2H2O.

Therefore, the complete set of equations for the given transformations is: 1. Zn + Cl2 → ZnCl2 2. ZnCl2 + 2H2O → Zn(OH)2 + 2HCl 3. Zn(OH)2 + 2NaOH → Na2ZnO2 + 2H2O.

Please note that these equations represent the chemical transformations based on the information provided. However, it's important to note that the actual reaction conditions, such as temperature and pressure, may affect the reaction outcomes.