Balancing Charges in Mercury Compounds

The video tutorial explains how to write the formula for Mercury(I) Fluoride, highlighting that Mercury(I) is an exception and can be thought of as a polyatomic ion, Hg2^2+. Each mercury atom has a charge of +1, and the overall ion is Hg2^2+. Fluoride, derived from fluorine, forms ions with a -1 charge. To balance the charges in the neutral compound Hg2F2, two fluoride ions are needed to balance the +2 charge from the mercury ions. The video also covers how to name the compound based on its formula, emphasizing the importance of understanding ion charges.

What is the charge of each mercury atom in the polyatomic ion Hg2^2+?

• 2+

• 1+

• 2-

• 1-

How is the charge of the fluoride ion balanced in the compound Hg2F2?

• By having two fluoride ions

• By adding more mercury ions

• By adding a different element

• By changing the charge of mercury

What is the overall charge of the compound Hg2F2?

• 1-

• 0

• 1+

• 2+

How many fluoride ions are needed to balance the charge of Hg2^2+?

• One

• Four

• Two

• Three

Why is the compound named Mercury(I) Fluoride?

• Because mercury has a charge of 2+

• Because each mercury ion has a charge of 1+

• Because fluoride has a charge of 2-

• Because it contains two mercury atoms

What is the charge of the fluoride ion in Hg2F2?

• 1+

• 2+

• 1-

• 2-