Oxidation Numbers and States

This video tutorial explores the oxidation numbers of chlorine, highlighting its various oxidation states depending on what it is bonded to. Chlorine can have oxidation states of -1, +1, +3, +5, and +7. The video explains that Cl2 is a free element with an oxidation number of zero. When bonded with hydrogen, chlorine's oxidation state changes to -1, while hydrogen becomes +1. The tutorial provides examples of chlorine in different compounds, such as NaCl and CaCl2, and explains how to determine oxidation numbers based on periodic table groups. The video concludes with a summary of the key points discussed.

What are the most common oxidation states of chlorine?

• Zero, plus one, plus two, plus three, and plus four

• Minus one, zero, plus one, plus two, and plus three

• Minus one, plus one, plus three, plus five, and plus seven

• Minus two, plus two, plus four, plus six, and plus eight

What is the oxidation number of Cl2 when it is in its elemental form?

• Plus one

• Zero

• Minus one

• Plus two

When hydrogen is bonded to non-metals, what is its typical oxidation state?

• Plus two

• Zero

• Plus one

• Minus one

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

• Minus one

• Zero

• Plus one

• Plus two

What is the oxidation number of chlorine in NaCl?

• Minus one

• Plus one

• Zero

• Plus two

In CaCl2, what is the oxidation number of calcium?

• Plus one

• Plus two

• Minus one

• Zero

When chlorine is bonded to fluorine, what is the oxidation state of chlorine in ClF2?

• Zero

• Minus one

• Plus two

• Plus one

Which element always has an oxidation number of minus one when bonded?

• Hydrogen

• Chlorine

• Fluorine

• Oxygen

What is the oxidation number of chlorine in Cl2 when it is not bonded to any other element?

• Plus one

• Plus two

• Minus one

• Zero

Which of the following is NOT a common oxidation state of chlorine?

• Plus three

• Plus seven

• Minus one

• Plus four