Oxidation States of Aluminum and Hydrogen

The video tutorial explains the concept of oxidation states, focusing on aluminum. It begins by discussing the oxidation number of aluminum as a free element, which is zero. The video then explores how aluminum's oxidation number changes when it forms compounds, such as aluminum oxide and aluminum hydride. The most common oxidation state for aluminum is +3, but examples of +2 and +1 states are also provided. The tutorial concludes by summarizing the key points about aluminum's oxidation numbers.

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

• 0

• -1

• +1

• +3

In aluminum oxide (Al2O3), what is the oxidation state of aluminum?

• 0

• +2

• +1

• +3

How does oxygen typically affect the oxidation state of aluminum in compounds?

• It has no effect

• It makes aluminum +3

• It makes aluminum +2

• It makes aluminum -1

In the compound AlO, what is the oxidation state of aluminum?

• +3

• +2

• +1

• 0

What is the oxidation state of oxygen in most compounds?

• -2

• 0

• -1

• +1

In aluminum hydride, what is the oxidation state of hydrogen?

• -1

• 0

• +1

• +2

When aluminum is bonded with hydrogen, what is the oxidation state of aluminum?

• +1

• +2

• 0

• +3

Which of the following is the most common oxidation state of aluminum?

• 0

• +1

• +2

• +3

What is the overall charge of a neutral compound?

• +2

• 0

• -1

• +1

In which scenario does hydrogen have a -1 oxidation state?

• When in its elemental form

• When bonded to non-metals

• When bonded to metals

• When in water