Question

CaCO3-CaO-Ca(OH)2-CaCl2​

Answer 1

1)CaCO3-> Cao+ CO2

2)2CaO+2H2O=2Ca(OH)2

3)Ca(OH)2+2HCl = CaCl2 + H2O

4)CaCl2 + Na2CO3 = 2NaCL + CaCO3

5)CaCO3->CaO+CO2

Answer 2

The sequence you provided represents a series of chemical reactions involving calcium carbonate (CaCO3) and various products formed through those reactions. Let's go through each step of the reaction sequence:

1. CaCO3 (calcium carbonate) decomposes into CaO (calcium oxide) and CO2 (carbon dioxide) through a process called thermal decomposition: CaCO3 (s) → CaO (s) + CO2 (g)

2. CaO (calcium oxide) reacts with water (H2O) to form Ca(OH)2 (calcium hydroxide). This reaction is known as a base-catalyzed hydration reaction: CaO (s) + H2O (l) → Ca(OH)2 (aq)

3. Ca(OH)2 (calcium hydroxide) can then react with hydrochloric acid (HCl) to form CaCl2 (calcium chloride) and water (H2O): Ca(OH)2 (aq) + 2 HCl (aq) → CaCl2 (aq) + 2 H2O (l)

The overall reaction sequence can be represented as: CaCO3 (s) → CaO (s) + CO2 (g) CaO (s) + H2O (l) → Ca(OH)2 (aq) Ca(OH)2 (aq) + 2 HCl (aq) → CaCl2 (aq) + 2 H2O (l)

These reactions are fundamental in various industrial processes, such as lime production and water treatment.