Oxidation Numbers in AlH4-

The video tutorial explains how to find oxidation numbers for each element in the AlH4- ion. It begins by discussing the rules for oxidation numbers and the significance of the ion's charge. The tutorial then demonstrates how to calculate the oxidation numbers for aluminum and hydrogen in AlH4-, using algebraic equations. Finally, it verifies the calculations and concludes with a summary of the oxidation numbers for the ion.

What is the total oxidation number for the elements in AlH4-?

• 0

• -1

• +1

• -2

What is the oxidation number of hydrogen when bonded to a metal?

• -1

• +2

• 0

• +1

How many hydrogen atoms are present in AlH4-?

• 2

• 3

• 4

• 5

What is the oxidation number of aluminum in AlH4-?

• -3

• 0

• +3

• +1

Which equation represents the relationship between the oxidation numbers in AlH4-?

• x + 4(-1) = 0

• x + 4(-1) = -1

• x - 4 = 1

• x + 4 = -1

What is the result of adding the oxidation numbers of all elements in AlH4-?

• +1

• -2

• 0

• -1

Why is the oxidation number of hydrogen negative in AlH4-?

• Because it is bonded to a metal

• Because it is in a neutral compound

• Because it is in a positive ion

• Because it is bonded to a non-metal

What is the significance of verifying the oxidation numbers in AlH4-?

• To find the number of atoms

• To determine the molecular weight

• To confirm the charge of the ion

• To ensure the compound is stable