Copper(II) Hydroxide and Ionic Charges

The video tutorial explains how to name the compound CuOH2, known as copper(II) hydroxide. It begins by identifying the components: copper, a transition metal, and hydroxide, a polyatomic ion. The tutorial outlines the rules for naming ionic compounds, emphasizing the importance of determining the ionic charges. Copper, being a transition metal, can have multiple charges, and in this case, it is copper(II) due to its bond with two hydroxide ions. The video also covers how to write the chemical formula from the compound name, ensuring the charges balance.

What type of ion is OH in the compound Cu(OH)2?

• Monatomic ion

• Polyatomic ion

• Cation

• Anion

What is the first step in naming the compound Cu(OH)2?

• Determine the overall charge

• Write the name of the metal

• Write the name of the polyatomic ion

• Identify the charge of the metal

Why can copper have different ionic charges?

• It is a transition metal

• It is a nonmetal

• It is a noble gas

• It forms covalent bonds

What is the charge of the copper ion in Cu(OH)2?

• 3+

• 4+

• 2+

• 1+

How many hydroxide ions are needed to balance the charge of one copper ion in Cu(OH)2?

• One

• Two

• Three

• Four

What does the Roman numeral in Copper(II) Hydroxide indicate?

• The number of hydroxide ions

• The charge of the hydroxide ion

• The number of copper atoms

• The charge of the copper ion

If given the name Copper(II) Hydroxide, what is the formula?

• Cu2(OH)3

• Cu2OH

• Cu(OH)2

• CuOH

What is the charge of each hydroxide ion in Cu(OH)2?

• 2-

• 2+

• 1-

• 1+