Oxidation Numbers and Bicarbonate Ion

This video tutorial explains how to determine the oxidation number for iron in iron(II) bicarbonate. It covers the concept of oxidation numbers, the role of polyatomic ions, and the method to calculate oxidation numbers for each element in the compound. The tutorial emphasizes that the sum of oxidation numbers in a neutral compound is zero and provides a step-by-step calculation for the bicarbonate ion, highlighting the oxidation states of hydrogen, carbon, and oxygen.

What must the sum of oxidation numbers equal in a neutral compound?

• The charge of the most electronegative element

• Zero

• The number of atoms in the compound

• The atomic number of the central atom

What is a polyatomic ion?

• An ion with a positive charge

• An ion with multiple atoms

• An ion with only one atom

• An ion with a negative charge

What is the oxidation number of hydrogen when bonded with nonmetals?

• +1

• -1

• 0

• +2

How many oxygen atoms are present in the bicarbonate ion?

• Four

• Three

• Two

• One

What is the typical oxidation number of oxygen in compounds?

• +1

• -1

• 0

• -2

What is the oxidation number of carbon in the bicarbonate ion?

• +2

• +5

• +4

• +3

Which element in the bicarbonate ion has an oxidation number of +1?

• Hydrogen

• Iron

• Oxygen

• Carbon

What is the overall charge of the bicarbonate ion?

• -2

• -1

• +1

• 0

In the compound iron(II) bicarbonate, what must the oxidation number of iron be to balance the charges?

• +3

• +2

• +4

• +1

What is the significance of the oxidation number in a compound?

• It helps in balancing chemical equations

• It determines the color of the compound

• It shows the physical state of the compound

• It indicates the number of atoms