Question

MgO → MgCO3 → Mg(HCO3)2 → MgCO3 → (MgOH)2CO3 → MgCO3 → MgCl2

Answer 1

MgO+CO2 = MgCO3
MgCO3+H2O+CO2 = Mg(HCO3)2
Mg(HCO3)2 =t= MgCO3 + H2O + CO2
2MgCO3 + 2NaOH = (MgOH)2CO3 + Na2CO3
(MgOH)2CO3 + Na2CO3 = 2MgCO3 + 2NaOH
MgCO3 + 2HCl = MgCl2 + CO2 + H2O

Answer 2

The series of chemical reactions you've listed involves the conversion of magnesium oxide (MgO) to magnesium chloride (MgCl2) through various intermediate compounds. Let's go through each step of the reaction sequence:

1. MgO → MgCO3: This is a reaction with carbon dioxide (CO2) where MgO reacts to form magnesium carbonate (MgCO3).

2. MgCO3 → Mg(HCO3)2: Magnesium carbonate reacts with carbon dioxide and water (H2O) to form magnesium bicarbonate (Mg(HCO3)2).

3. Mg(HCO3)2 → MgCO3: Magnesium bicarbonate decomposes into magnesium carbonate and carbon dioxide when heated or treated with an acid.

4. MgCO3 → (MgOH)2CO3: Magnesium carbonate reacts with water (H2O) to form magnesium hydroxide carbonate, also known as basic magnesium carbonate [(MgOH)2CO3].

5. (MgOH)2CO3 → MgCO3: Basic magnesium carbonate decomposes when heated, yielding magnesium carbonate.

6. MgCO3 → MgCl2: In the final step, magnesium carbonate reacts with hydrochloric acid (HCl) to form magnesium chloride (MgCl2) and carbon dioxide.

So, the overall reaction sequence can be summarized as follows: MgO → MgCO3 → Mg(HCO3)2 → MgCO3 → (MgOH)2CO3 → MgCO3 → MgCl2