Final answer:
The compound Al₂(SO₄)₃ is correctly named aluminum sulfate, as it consists of aluminum and sulfate ions in a 2:3 ratio without using prefixes for the metal name.
Step-by-step explanation:
The correct name for the compound with the chemical formula Al₂(SO₄)₃ is aluminum sulfate. This name is derived from the ions that make up the compound: Al³⁺ and SO₄²⁻, which combine in a 2:3 ratio. The nomenclature for ionic compounds does not require the use of prefixes like 'di-' or 'tri-' for the metal part of the name, hence 'dialuminum' is not used. Furthermore, this compound does not contain sulfide ions (S²⁻), which excludes the name 'trisulfide'. Instead, the name reflects the sulfate ion (SO₄²⁻) and the simplicity of the metal ion's name 'aluminum' without its charge, resulting in aluminum sulfate.