Question

Приведены схемы реакций. Составьте уравнения химических реакций и укажите их тип: HCl →ZnCl2 → Zn(OH)2→ Zn(NO3)2

Answer 1

Zn+2HCl=ZnCl₂+H₂ р.замещения
ZnCl₂+2NaOH=2NaCl+Zn(OH)₂ р.обмена
Zn(OH)₂+2HNO₃=Zn(NO₃)₂+2H₂O р.обмена

Answer 2

Chemical Reactions and Equations

The given chemical reactions can be represented as follows:

1. HCl → ZnCl2 (Reaction 1) 2. ZnCl2 → Zn(OH)2 (Reaction 2) 3. Zn(OH)2 → Zn(NO3)2 (Reaction 3)

Let's analyze each reaction and determine their types.

Reaction 1: HCl → ZnCl2

In this reaction, hydrogen chloride (HCl) reacts with zinc (Zn) to form zinc chloride (ZnCl2). The reaction can be classified as a single replacement reaction or a displacement reaction. Hydrogen (H) is displaced by zinc (Zn) in the compound.

The balanced chemical equation for Reaction 1 is: HCl + Zn → ZnCl2

Reaction 2: ZnCl2 → Zn(OH)2

In this reaction, zinc chloride (ZnCl2) reacts with water (H2O) to form zinc hydroxide (Zn(OH)2). The reaction can be classified as a double displacement reaction or a precipitation reaction. The chloride ions (Cl-) from zinc chloride are replaced by hydroxide ions (OH-) from water, resulting in the formation of zinc hydroxide.

The balanced chemical equation for Reaction 2 is: ZnCl2 + 2H2O → Zn(OH)2 + 2HCl

Reaction 3: Zn(OH)2 → Zn(NO3)2

In this reaction, zinc hydroxide (Zn(OH)2) reacts with nitric acid (HNO3) to form zinc nitrate (Zn(NO3)2). The reaction can be classified as a double displacement reaction or an acid-base reaction. The hydroxide ions (OH-) from zinc hydroxide react with the hydrogen ions (H+) from nitric acid, resulting in the formation of water (H2O) and zinc nitrate.

The balanced chemical equation for Reaction 3 is: Zn(OH)2 + 2HNO3 → Zn(NO3)2 + 2H2O

Please note that the balanced chemical equations provided above are based on the given reactions.