Oxidation Numbers and Ions

The video tutorial explains how to find the oxidation numbers for each element in the hydrogen sulfide ion (HS-). It begins by identifying the ion and its negative charge, then sets up an equation to determine the oxidation numbers. The tutorial explains that hydrogen, when bonded to a non-metal like sulfur, has an oxidation number of +1. Sulfur's oxidation number is determined to be -2, ensuring the sum of oxidation numbers equals the ion's charge of -1. The video concludes with a summary of the oxidation numbers for sulfur and hydrogen in HS-.

What is the charge on the hydrogen sulfide ion?

• Positive one

• Negative one

• Zero

• Positive two

What must the sum of the oxidation numbers in an ion equal?

• The atomic number

• The mass number

• The charge on the ion

• Zero

When hydrogen is bonded to a non-metal, what is its oxidation number?

• Positive two

• Negative one

• Zero

• Positive one

What variable is used to represent the oxidation number of sulfur in the equation?

• s

• x

• z

• y

What is the oxidation number of sulfur in the hydrogen sulfide ion?

• Positive one

• Negative two

• Zero

• Negative one

What is the result when you add the oxidation numbers of hydrogen and sulfur in the ion?

• Positive one

• Negative two

• Zero

• Negative one

Who is the narrator of the video?

• Dr. A

• Dr. D

• Dr. C

• Dr. B