How many cations will be produced from a solution of potassium aluminium tetraoxosulphate (VI)?

We are asked about the number of cations produced from the solution of potassium aluminium tetraoxosulphate (VI).

Step 1: Write the formula
Potassium aluminium tetraoxosulphate (VI) is commonly written as:

\(KAl(SO_4)_2 \cdot 12H_2O\) (known as potash alum).

Step 2: Identify the ions on dissociation
When dissolved in water, it dissociates as:

\(KAl(SO_4)_2 \cdot 12H_2O \;\; \longrightarrow \;\; K^+ + Al^{3+} + 2SO_4^{2-} + 12H_2O\)

Step 3: Count the cations

• One \(K^+\) ion
• One \(Al^{3+}\) ion

So, total = 2 cations.

Answer: 2