Oxidation Numbers and Copper Compounds

The video tutorial explains how to determine the oxidation numbers for copper in copper(I) fluoride (CuF). It starts by noting that CuF is a neutral compound, meaning the oxidation numbers must sum to zero. Since fluorine always has an oxidation number of -1, copper must have an oxidation number of +1 to balance it out. This is why the compound is called copper(I) fluoride. The video also touches on the fact that copper, being a transition metal, can have multiple oxidation states, but in this case, it is determined by its bond with fluorine.

What is the total sum of oxidation numbers in a neutral compound like CuF?

• It is zero.

• It is always negative.

• It varies depending on the compound.

• It is always positive.

Why is copper not found in a fixed oxidation state in the periodic table?

• Because it is a transition metal.

• Because it is an alkali metal.

• Because it is a non-metal.

• Because it is a noble gas.

What is the oxidation number of fluorine in compounds?

• +2

• -1

• 0

• +1

What must be the oxidation number of copper in CuF to balance the compound?

• +2

• -1

• +1

• 0

Why is CuF referred to as copper(I) fluoride?

• Because fluorine has an oxidation number of +1.

• Because copper has an oxidation number of +2.

• Because it is a diatomic molecule.

• Because copper has an oxidation number of +1.