How will you prepare Aspirin from Salicylic Acid ? Give two uses of Aspirin .

Explanation

### Step-by-Step Text Solution:

**Step 1: Identify the Reactants**
- The starting material for the preparation of Aspirin is Salicylic Acid. Its chemical structure includes a hydroxyl group (-OH) and a carboxylic acid group (-COOH) attached to a benzene ring.

**Step 2: React Salicylic Acid with Acetic Anhydride**
- Aspirin is synthesized by reacting Salicylic Acid with Acetic Anhydride (C4H6O3). Acetic Anhydride is a reagent that will introduce an acetyl group into the Salicylic Acid.

**Step 3: Mechanism of Reaction**
- The reaction begins with the protonation of the acetic anhydride, which leads to the formation of a reactive carbocation.
- The carbocation then reacts with the hydroxyl group of Salicylic Acid. The lone pair of electrons on the oxygen atom of the hydroxyl group attacks the carbonyl carbon of the acetic anhydride.

**Step 4: Formation of Aspirin**
- As a result of the reaction, the -OH group of Salicylic Acid is replaced by an -OCOCH3 (acetyl) group, leading to the formation of Aspirin (Acetylsalicylic Acid).
- The by-products of this reaction include acetic acid (CH3COOH) and a proton (H+).

**Step 5: Final Structure of Aspirin**
- The final structure of Aspirin consists of a benzene ring with an acetyl group (-OCOCH3) and a carboxylic acid group (-COOH) attached.

**Step 6: Uses of Aspirin**
- Aspirin has several important uses:
1. **Antipyretic**: It is commonly used to reduce fever.
2. **Anti-inflammatory**: It is used to relieve inflammation and pain.