Question

CaC2→C2H2→C2H4→C2H4Cl2

Answer 1

CaC2+H20->C2H2+CaO
C2H2+H2->C2H4
C2H4+Cl2->C2H4Cl2

Answer 2

The chemical reaction you mentioned involves a series of transformations starting with calcium carbide (CaC2) and resulting in the formation of dichloroethane (C2H4Cl2) via the intermediate compounds acetylene (C2H2) and ethylene (C2H4). Let's go through the reactions step by step:

1. CaC2 → C2H2: Calcium carbide (CaC2) reacts with water (H2O) to produce acetylene (C2H2) gas and calcium hydroxide (Ca(OH)2) as a byproduct. The reaction is as follows: CaC2 + 2H2O → C2H2 + Ca(OH)2

2. C2H2 → C2H4: Acetylene (C2H2) can undergo a reaction called hydrogenation, where it reacts with hydrogen (H2) in the presence of a catalyst to form ethylene (C2H4). The reaction can be represented as: C2H2 + H2 → C2H4

3. C2H4 → C2H4Cl2: Ethylene (C2H4) can be chlorinated by reacting it with chlorine (Cl2) to produce 1,2-dichloroethane (C2H4Cl2). This reaction requires a catalyst such as iron (III) chloride (FeCl3) or sunlight. The reaction is as follows: C2H4 + Cl2 → C2H4Cl2

So, the overall reaction sequence you provided can be summarized as: CaC2 + 2H2O → C2H2 + Ca(OH)2 C2H2 + H2 → C2H4 C2H4 + Cl2 → C2H4Cl2