An example of salt formed by a base and an acid is...

Options

A. Sodium chloride
B. Calcium sulphate
C. Lithium chloride
D. Sodium chlorate

Explanation

To answer the question "An example of salt formed by a base and an acid is...", we need to understand what a salt is and how it is formed. Salts are typically produced from the reaction of an acid with a base, which is known as a neutralization reaction. Here’s a step-by-step solution:

### Step 1: Understand the Reaction
A salt is formed when an acid reacts with a base. The general reaction can be represented as:
\[ \text{Acid} + \text{Base} \rightarrow \text{Salt} + \text{Water} \]

### Step 2: Identify Examples of Acids and Bases
- **Acids**: Hydrochloric acid (HCl), Sulfuric acid (H₂SO₄), Nitric acid (HNO₃)
- **Bases**: Sodium hydroxide (NaOH), Calcium hydroxide (Ca(OH)₂), Lithium oxide (Li₂O)

### Step 3: Provide Examples of Salts
1. **Sodium Chloride (NaCl)**: Formed from the reaction of sodium hydroxide (NaOH) and hydrochloric acid (HCl).
\[ \text{NaOH} + \text{HCl} \rightarrow \text{NaCl} + \text{H}_2\text{O} \]

2. **Calcium Sulfate (CaSO₄)**: Formed from the reaction of calcium hydroxide (Ca(OH)₂) and sulfuric acid (H₂SO₄).
\[ \text{Ca(OH)}_2 + \text{H}_2\text{SO}_4 \rightarrow \text{CaSO}_4 + \text{H}_2\text{O} \]

3. **Lithium Chloride (LiCl)**: Formed from the reaction of lithium oxide (Li₂O) and hydrochloric acid (HCl).
\[ \text{Li}_2\text{O} + 2\text{HCl} \rightarrow 2\text{LiCl} + \text{H}_2\text{O} \]

4. **Sodium Nitrate (NaNO₃)**: Formed from the reaction of sodium hydroxide (NaOH) and nitric acid (HNO₃).
\[ \text{NaOH} + \text{HNO}_3 \rightarrow \text{NaNO}_3 + \text{H}_2\text{O} \]

### Step 4: Conclusion
All the examples provided (sodium chloride, calcium sulfate, lithium chloride, and sodium nitrate) are salts formed by the reaction of an acid and a base. Therefore, the answer to the question is that any of these examples can be considered correct.