Aluminum Sulfide Compounds and Ions

The video tutorial explains how to name and write the formula for the ionic compound Al2S3, known as aluminum sulfide. It begins by identifying the compound as a binary ionic compound, consisting of a metal (aluminum) and a non-metal (sulfur). The tutorial outlines the naming rules: the metal name is written first, followed by the non-metal with an 'ide' suffix. It also covers how to derive the chemical formula from the name by balancing the charges of aluminum (3+) and sulfur (2-) ions to achieve a net charge of zero, resulting in the formula Al2S3.

What type of compound is Al2S3?

• Covalent compound

• Binary ionic compound

• Ternary compound

• Molecular compound

Which element is the metal in Al2S3?

• Nitrogen

• Oxygen

• Sulfur

• Aluminum

How do you modify the name of the non-metal in a binary ionic compound?

• Add 'ite' to the end

• Add 'ide' to the end

• Add 'ium' to the end

• Add 'ate' to the end

What is the charge of an aluminum ion in Al2S3?

• 2+

• 1+

• 3+

• 4+

What is the charge of a sulfur ion in Al2S3?

• 1-

• 2-

• 3-

• 4-

How many aluminum ions are needed to balance the charge of three sulfur ions?

• Four

• Three

• Two

• One

What is the chemical formula for aluminum sulfide?

• AlS

• AlS2

• Al2S3

• Al3S2