Give equations for the Formation of acetylene.

Explanation

To derive the equation for the formation of acetylene (C2H2), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**: The primary reactant for the formation of acetylene is calcium carbide (CaC2). Additionally, hydrogen gas (H2) is required for the reaction.

2. **Write the Reaction**: When calcium carbide reacts with hydrogen gas, it produces acetylene and calcium hydroxide (Ca(OH)2). The reaction can be represented as follows:
\[ \text{CaC}_2 + 2 \text{H}_2 \rightarrow \text{C}_2\text{H}_2 + \text{Ca(OH)}_2 \]

3. **Balance the Reaction**: Ensure that the number of atoms of each element is the same on both sides of the equation. In this case, we have:
- Left side: 1 Ca, 2 C, 4 H (from 2 H2)
- Right side: 1 Ca, 2 C, 2 H (from C2H2) + 2 H (from Ca(OH)2) = 4 H
The equation is balanced as written.

4. **Final Equation**: The balanced equation for the formation of acetylene from calcium carbide and hydrogen is:
\[ \text{CaC}_2 + 2 \text{H}_2 \rightarrow \text{C}_2\text{H}_2 + \text{Ca(OH)}_2 \]