Copper(II) Cyanide and Its Properties

This video tutorial explains how to write the formula for copper(II) cyanide. It begins by discussing the significance of the Roman numeral in copper's name, indicating its ionic charge. The video then covers the cyanide ion, its composition, and charge. Finally, it demonstrates how to balance the charges to form the compound Cu(CN)2, with cyanide ions in parentheses, concluding with the final formula.

What does the Roman numeral 'II' signify in copper(II) cyanide?

• The atomic number of copper

• The number of copper atoms

• The ionic charge of copper

• The number of cyanide ions

Why is copper considered a transition metal?

• It is located in Group 1 of the periodic table

• It has a fixed oxidation state

• It has a variable oxidation state

• It is a non-metal

What is the chemical formula for the cyanide ion?

• C2N2

• CN2

• C2N

• CN

What is the charge of the cyanide ion?

• 2+

• 1+

• 1-

• 2-

How do you balance the charges to form copper(II) cyanide?

• Use a different metal

• Add more copper ions

• Add more cyanide ions

• Use parentheses to group ions

What is the correct formula for copper(II) cyanide?

• CuCN

• Cu(CN)2

• Cu2CN

• Cu2(CN)2