Oxidation Numbers and Ionic Compounds

The video tutorial explains how to determine the oxidation numbers for each element in sodium hydroxide (NaOH). It begins by introducing the concept of oxidation numbers and the use of the periodic table to find them. Sodium, being in group one, has a +1 oxidation number. Oxygen typically has a -2 oxidation number, and hydrogen, when bonded to nonmetals like oxygen, has a +1 oxidation number. The tutorial emphasizes that in a neutral compound like NaOH, the sum of oxidation numbers must equal zero. The video concludes with a summary of these points.

What is the oxidation number of sodium in NaOH?

• -1

• 0

• +2

• +1

Which group in the periodic table does sodium belong to?

• Group 17

• Group 2

• Group 1

• Group 16

What is the typical oxidation number of oxygen in compounds?

• 0

• +1

• -2

• +2

When hydrogen is bonded to nonmetals, what is its oxidation number?

• -1

• +1

• 0

• +2

Why does NaOH have no overall charge?

• Because it is an ionic compound

• Because the oxidation numbers add up to zero

• Because it contains only nonmetals

• Because it is a gas

What is the sum of the oxidation numbers in a neutral compound?

• +2

• +1

• 0

• -1