Tin(IV) Iodide and Ions

The video tutorial explains how to write the chemical formula for tin(IV) iodide. It begins by identifying the symbols for tin and iodide, noting that tin is a transition metal with a charge of 4+. The tutorial then discusses the iodide ion, which has a charge of 1-. To balance the charges, four iodide ions are needed to match the 4+ charge of tin, resulting in the formula SnI4. The video also covers how to name the compound using the formula, emphasizing the importance of the Roman numeral to indicate the charge of the transition metal.

What is the element symbol for tin?

• Tn

• Sn

• Ti

• Si

What is the charge of the iodide ion?

• 2+

• 1+

• 2-

• 1-

How many iodide ions are needed to balance the charge of one tin(IV) ion?

• 3

• 2

• 4

• 5

What is the chemical formula for tin(IV) iodide?

• SnI2

• SnI3

• SnI4

• SnI

Why is a Roman numeral used in the name of tin(IV) iodide?

• To indicate the number of iodide ions

• To denote the phase of the compound

• To show the charge of the tin ion

• To specify the number of tin atoms