Electronegativity and Oxidation States

The video tutorial explains how to determine the oxidation numbers for boron in BH3, also known as boron trihydride. It begins by introducing the concept of oxidation numbers and the properties of boron and hydrogen. The tutorial then discusses the electronegativity of these elements and how it affects the assignment of oxidation numbers. The video provides a step-by-step calculation of the oxidation states, concluding that boron in BH3 has an oxidation state of +3. The tutorial is designed to help viewers understand the process of determining oxidation numbers in compounds with metalloids like boron.

What is the main challenge in determining the oxidation number of boron in BH3?

• Boron is a noble gas.

• Boron is a non-metal.

• Boron is a metal.

• Boron is a metalloid.

What is the typical oxidation state of hydrogen when bonded with non-metals?

• 0

• +1

• -1

• +2

Why can't the usual rule for hydrogen's oxidation state be easily applied to boron?

• Boron is a metal.

• Boron is a metalloid.

• Boron is a noble gas.

• Boron is a halogen.

Which element is more electronegative, boron or hydrogen?

• Boron

• Hydrogen

• They have the same electronegativity

• It depends on the compound

What is the electronegativity value of hydrogen?

• 2.20

• 3.00

• 1.00

• 2.04

How many electrons does hydrogen gain when bonded to boron?

• One electron

• Two electrons

• No electrons

• Three electrons

What is the oxidation state of boron in BH3?

• +1

• +2

• 0

• +3

How do the oxidation numbers of hydrogen and boron in BH3 add up?

• They add up to -1

• They add up to 0

• They add up to +1

• They add up to +3