Case 1 : Common edible salt, NaCl Sodium Chloride ) obtained from seawater or from lakes contains many impurities such as sulphates of sodium and magnesium along with chlorides of calcium and magnesium. The chlorides of these metals are particularly undesirable being deliquescent in nature. A saturated solution of salt in a minimum quantity of water is prepared and insoluble impurities are filtered off. HCL gas is then passed through the saturated solution and the crystals of pure NaCl separate out. the soluble impurities remain in the solution. Pure crystals of NaCl are filtered, washed and dried.
Nature of the aqueous solution of common salt is:

Options

A. Acidic
B. Alkaline
C. Basic
D. Neutral

Answer

To determine the nature of the aqueous solution of common salt (NaCl), we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Compound**:
- Common salt is chemically known as sodium chloride (NaCl).

2. **Dissolution in Water**:
- When NaCl is dissolved in water, it dissociates into its constituent ions:
\[ \text{NaCl (s)} \rightarrow \text{Na}^+ (aq) + \text{Cl}^- (aq) \]

3. **Nature of the Ions**:
- The sodium ion (Na^+) comes from sodium hydroxide (NaOH), which is a strong base.
- The chloride ion (Cl^-) comes from hydrochloric acid (HCl), which is a strong acid.

4. **Acid-Base Reaction**:
- Since Na^+ is derived from a strong base and Cl^- from a strong acid, the resulting solution does not exhibit acidic or basic properties.

5. **pH Level**:
- The pH of a solution is determined by the concentration of hydrogen ions (H^+). In the case of NaCl, the solution remains neutral because the strong acid and strong base neutralize each other.
- Therefore, the pH of the solution is approximately 7.

6. **Conclusion**:
- Since the pH is 7, the nature of the aqueous solution of common salt is neutral.

### Final Answer:
The nature of the aqueous solution of common salt (NaCl) is **neutral**.

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