Hydroiodic Acid and Iodine Properties

The video tutorial explains how to write the chemical formula for hydroiodic acid (HI). It begins by identifying the components of the acid, starting with hydrogen, which makes it an acid, and iodine, identified by its symbol 'I' from the periodic table. The tutorial then explains how to balance the charges: hydrogen has a positive charge, and iodine, being in group 17, has a negative charge. These charges cancel each other out, resulting in a net charge of zero, confirming the correct formula for hydroiodic acid. The video concludes with a brief summary and thanks to the viewers.

What is the significance of the prefix 'hydro' in naming hydroiodic acid?

• It indicates the presence of oxygen.

• It means the acid is a base.

• It signifies the acid is binary.

• It shows the acid is organic.

Which element's symbol is used after hydrogen in the formula for hydroiodic acid?

• Iron (Fe)

• Indium (In)

• Iodine (I)

• Iridium (Ir)

What is the charge of hydrogen in hydroiodic acid?

• Negative

• Neutral

• Variable

• Positive

In which group is iodine found on the periodic table?

• Group 7A

• Group 1

• Group 14

• Group 18

What is the net charge of hydroiodic acid when the charges are balanced?

• Double negative

• Zero

• Negative

• Positive