What Type of Reaction is Al + NaOH

Q. What type of reaction is Al + NaOH? What are the products formed?

Answer:- Aluminium produces sodium tetrahydroxoaluminate and hydrogen when it reacts with sodium hydroxide and water.

2Al + 2NaOH + 6H₂O → 2Na [Al (OH)₄] + 3H₂

A displacement reaction occurs when aluminium reacts with sodium hydroxide (where one element is more reactive than the other and displaces it in a reaction).

Aluminium is an amphoteric element, meaning it interacts with acids and bases to form a salt and hydrogen. Exothermicity is high in this process.

Displacement Reaction:

A displacement reaction is one in which one reactant is partially replaced by another reactant. A displacement reaction can also be referred to as a replacement or metathesis reaction. 

Displacement reactions are divided into two categories.

Single Displacement Reactions: –

Single displacement reactions occur when one reactant partially replaces the other:

AB + C → AC + B

The interaction of iron with copper sulphate to produce iron sulphate and copper is an example:

Fe + CuSO₄ → FeSO₄ + Cu

Both iron and copper have the same valence in this situation. One metal cation bonds to the sulphate anion in place of the other.

Double Displacement Reactions: –

The cations and anions in the reactants switch partners to create products in double displacement reactions:

AB + CD → AD + CB

The reaction of silver nitrate with sodium chloride to produce silver chloride and sodium nitrate is an example:

AgNO₃ + NaCl → AgCl + NaNO₃