Oxidation Numbers and Manganate Ion

The video tutorial explains how to find oxidation numbers for elements in the manganate ion (MnO4^2-). It covers the rules for oxidation numbers in ions, sets up an equation to determine the oxidation number of manganese, and solves it to find that manganese has an oxidation number of +6. The tutorial concludes with a summary of the oxidation numbers for the manganate ion.

What is the oxidation number of oxygen in most compounds?

• -2

• +1

• +2

• 0

In a neutral compound, what should the sum of oxidation numbers equal?

• The atomic number

• The number of atoms

• The charge of the ion

• Zero

What is the charge of the manganate ion, MnO4^2-?

• 2-

• 1-

• 2+

• 0

How many oxygen atoms are present in the manganate ion?

• 5

• 4

• 3

• 2

What is the oxidation number of manganese in MnO4^2-?

• +7

• +5

• +6

• +4

Which of the following is true about the oxidation number of manganese in MnO4^2-?

• It is positive

• It is equal to the charge of the ion

• It is zero

• It is negative

What is the sum of oxidation numbers in the manganate ion?

• -4

• +2

• -2

• 0

Which rule is used to determine the oxidation number of elements in ions?

• The sum equals zero

• The sum equals the number of atoms

• The sum equals the charge of the ion

• The sum equals the atomic number