Question

Zn → ZnO → ZnSO4 → Zn(OH)2 → ZnCl2 → Zn(NO3 )2 → Mg(NO3 )2 → Mg(OH)2 → MgO;

Answer 1

2Zn + O2 = 2ZnO

ZnO + H2SO4 = ZnSO4 + H2O

ZnSO4 + 2NaOH = Zn(OH)2 + Na2SO4

Zn(OH)2 + 2HCl = ZnCl2 + 2H2O

ZnCl2 + 2AgNO3 = Zn(NO3)2 + 2AgCl

Zn(NO3)2 + Mg = Mg(NO3)2 + Zn

Mg(NO3)2 + 2KOH = Mg(OH)2 + 2KNO3

Mg(OH)2 =(t°)= MgO + H2O

Answer 2

The sequence you provided shows a series of chemical reactions starting with zinc (Zn) and ending with magnesium oxide (MgO). Let's go through each step:

1. Zn: This represents elemental zinc.

2. Zn → ZnO: Zinc reacts with oxygen to form zinc oxide (ZnO). This reaction is an oxidation process.

3. ZnO → ZnSO4: Zinc oxide reacts with sulfuric acid (H2SO4) to produce zinc sulfate (ZnSO4). This reaction involves the replacement of oxygen in zinc oxide with sulfur from sulfuric acid.

4. ZnSO4 → Zn(OH)2: Zinc sulfate reacts with a strong base, such as sodium hydroxide (NaOH), to form zinc hydroxide (Zn(OH)2). This reaction is a precipitation reaction.

5. Zn(OH)2 → ZnCl2: Zinc hydroxide reacts with hydrochloric acid (HCl) to produce zinc chloride (ZnCl2). This reaction involves the replacement of hydroxide ions with chloride ions.

6. ZnCl2 → Zn(NO3)2: Zinc chloride reacts with nitric acid (HNO3) to form zinc nitrate (Zn(NO3)2). This reaction involves the replacement of chloride ions with nitrate ions.

7. Zn(NO3)2 → Mg(NO3)2: Zinc nitrate reacts with magnesium metal (Mg) to produce magnesium nitrate (Mg(NO3)2). This reaction involves the replacement of zinc with magnesium.

8. Mg(NO3)2 → Mg(OH)2: Magnesium nitrate reacts with a strong base, such as sodium hydroxide (NaOH), to form magnesium hydroxide (Mg(OH)2). This reaction is a precipitation reaction.

9. Mg(OH)2 → MgO: Magnesium hydroxide undergoes a dehydration reaction, typically through heating, to form magnesium oxide (MgO). Water is released in this process.

So, the overall sequence of reactions is:

Zn → ZnO → ZnSO4 → Zn(OH)2 → ZnCl2 → Zn(NO3)2 → Mg(NO3)2 → Mg(OH)2 → MgO