What is the correct name for the compound with the formula Al(OH)3?

• A. Aluminum trihydroxide
• B. Aluminum hydride
• C. Aluminum hydroxide
• D. Aluminum oxide

Answer: (C)

Verified step by step guidance

1. Identify the components of the compound Al(OH)3: it contains aluminum (Al) and hydroxide ions (OH).
2. Recognize that (OH) is the hydroxide ion, which is a polyatomic ion consisting of one oxygen and one hydrogen atom with a charge of -1.
3. Since there are three hydroxide ions, the compound contains three OH groups bonded to one aluminum ion.
4. The aluminum ion typically has a charge of +3, which balances the three hydroxide ions each with a -1 charge, making the compound neutral.
5. Name the compound by combining the metal name (Aluminum) with the name of the polyatomic ion (hydroxide), resulting in Aluminum hydroxide.