How is phenolphthalein obtained?

Explanation

To obtain phenolphthalein, we follow a specific chemical reaction involving phenol and phthalic anhydride. Here’s a step-by-step breakdown of the process:

### Step 1: Gather Reactants
- **Reactants Needed**: We need two equivalents of phenol (C6H5OH) and one equivalent of phthalic anhydride (C8H4O3).

### Step 2: Set Up Reaction Conditions
- **Reaction Medium**: The reaction is carried out in the presence of concentrated sulfuric acid (H2SO4) as a catalyst.
- **Heating**: The mixture is heated to facilitate the reaction.
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