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Phenol is a unique compound with a simple chemical structure, consisting of a benzene ring bonded to a hydroxyl group (\( OH \)). This gives phenol the molecular formula \( C_6H_5OH \). Being an aromatic compound, it has special properties. Aromatic means the structure includes a stable ring of atoms, which often plays a significant role in its reactions.
One interesting aspect of phenol is its ability to donate the \( H^+ \) ion from its hydroxyl group, making it somewhat acidic. Even though it is not as acidic as stronger acids like hydrochloric acid, phenol is stronger compared to most alcohols.
When phenol reacts with bases, such as sodium hydroxide (\( \text{NaOH} \)), it loses its \( H^+ \) ion from the hydroxyl group, leading to the formation of a phenoxide ion \( (C_6H_5O^-) \). The phenoxide ion is the reason phenol reacts uniquely with strong bases.

Sodium hydroxide, commonly known by its formula \( \text{NaOH} \), is one of the most well-known bases in chemistry. It is a white, solid substance at room temperature and is widely used in its aqueous form.
As a base, \( \text{NaOH} \) can dissociate in water to give \( \text{Na}^+ \) (sodium ions) and \( \text{OH}^- \) (hydroxide ions). The ability of NaOH to dissociate easily makes it a strong base, able to neutralize acids and react with other substances.
In the context of its reaction with phenol, \( \text{NaOH} \) accepts the \( H^+ \) ion from phenol, facilitating the formation of the sodium phenoxide \( (C_6H_5ONa) \) along with water (\( \text{H}_2\text{O} \)). This reaction showcases the typical behavior of a strong base interacting with a somewhat acidic substance.

A balanced chemical equation is crucial for accurately representing a chemical reaction. It ensures that the number of atoms for each element is the same on both sides of the equation, adhering to the law of conservation of mass.
In the reaction between phenol and sodium hydroxide, the reactants are phenol \( C_6H_5OH \) and \( \text{NaOH} \). These react to produce sodium phenoxide \( C_6H_5ONa \) and water \( \text{H}_2\text{O} \).
The balanced equation for this reaction is given by: \[ C_6H_5OH + \text{NaOH} \rightarrow C_6H_5ONa + \text{H}_2\text{O} \] Here, each atom type is equal on both sides of the equation:

• One phenyl group (\( C_6H_5 \)) on both sides
• One \( \text{OH} \) unit on each side
• One sodium ion and one hydrogen atom on both sides

This balance confirms the correct and complete chemical representation of the reaction.