Determine the equivalent weight of Nacl

Answer

To determine the equivalent weight of NaCl, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Concept of Equivalent Weight**:
The equivalent weight of a substance is defined as the molecular weight divided by its valency. The valency refers to the charge of the ions formed when the substance dissociates in solution.

2. **Identify the Ions in NaCl**:
When sodium chloride (NaCl) dissolves in water, it dissociates into sodium ions (Na⁺) and chloride ions (Cl⁻).

3. **Determine the Valency**:
- The charge on the sodium ion (Na⁺) is +1.
- The charge on the chloride ion (Cl⁻) is -1.
- The magnitude of charge for both ions is 1. Therefore, the valency of NaCl is 1.

4. **Calculate the Molecular Weight of NaCl**:
- The atomic weight of sodium (Na) is approximately 22.989 g/mol.
- The atomic weight of chlorine (Cl) is approximately 35.453 g/mol.
- To find the molecular weight of NaCl, we add the atomic weights of Na and Cl:
\[ \text{Molecular Weight of NaCl} = \text{Weight of Na} + \text{Weight of Cl} = 22.989 + 35.453 = 58.442 \text{ g/mol} \]

5. **Calculate the Equivalent Weight**:
Using the formula for equivalent weight:
\[ \text{Equivalent Weight} = \frac{\text{Molecular Weight}}{\text{Valency}} = \frac{58.442 \text{ g/mol}}{1} = 58.442 \text{ g/equiv} \]

6. **Final Answer**:
The equivalent weight of NaCl is approximately **58.442 g/equiv**.