Copper Ion Charges and Oxidation States

The video discusses the charge on copper, a transition metal, which can form ions with different charges, such as Cu+ and Cu2+. It explains how these ions are formed by losing electrons and how they interact in compounds like copper sulfate (CuSO4) to balance charges. The video also highlights the difference between ionic charge and oxidation numbers, noting that copper can have variable oxidation states. A link is provided for further learning on oxidation states.

What is the charge of copper when it is in its elemental form?

• Negative

• Neutral

• Variable

• Positive

Which of the following is a possible charge for a copper ion?

• Cu+

• Cu3+

• Cu4+

• Cu-

What is the charge of a copper ion that has lost one electron?

• Cu2+

• Cu+

• Cu3+

• Cu-

How many electrons does a copper ion lose to form Cu2+?

• None

• Three

• Two

• One

In copper sulfate (CuSO4), what is the charge of the sulfate ion?

• 3-

• 0

• 2-

• 1-

How do you balance the charges in copper(I) sulfate?

• Use three Cu+ ions

• Use one Cu2+ ion

• Use two Cu+ ions

• Use one Cu+ ion

What is the net charge of copper(II) sulfate?

• 1+

• 1-

• 2+

• 0

What is the difference between ionic charge and oxidation number?

• They are the same

• Ionic charge is always negative

• Oxidation number can vary

• Ionic charge is always positive

What are the common oxidation numbers for copper?

• 1 and 2

• 2 and 3

• 3 and 4

• 0 and 1

Where can you learn more about variable oxidation states?

• In the lab

• In the textbook

• In the appendix

• In the video description