1. Understand the Formula

* Al₂(SO₄)₃ represents aluminum sulfate.

* The subscript "2" after Al indicates that there are two aluminum ions (Al³⁺) for every formula unit of aluminum sulfate.

2. Set up the Ratio

* The ratio between moles of Al₂(SO₄)₃ and moles of Al³⁺ is 1:2.

3. Calculate Moles of Aluminum Ions

Since you have 0.50 moles of Al₂(SO₄)₃, you can use the ratio to find the moles of Al³⁺:

(0.50 moles Al₂(SO₄)₃) * (2 moles Al³⁺ / 1 mole Al₂(SO₄)₃) = 1.0 mole Al³⁺

Therefore, there are 1.0 moles of aluminum ions present in 0.50 mole of Al₂(SO₄)₃.