Oxidation States and Charges

The video tutorial explains how to determine the oxidation number for manganese in manganese(II) hydroxide. It begins by discussing the neutrality of compounds and the role of transition elements like manganese, which can have multiple oxidation states. The tutorial then focuses on the hydroxide ion, explaining its ionic charge and how oxidation numbers add up to achieve neutrality. It also covers the specific oxidation numbers for oxygen and hydrogen in compounds, concluding with a summary of the oxidation numbers in manganese hydroxide.

What is the overall charge of manganese(II) hydroxide?

• Neutral

• Positive

• Depends on the environment

• Negative

Why can manganese have multiple oxidation states?

• It is a noble gas

• It is a transition element

• It is a non-metal

• It is a halogen

What is the charge of the hydroxide ion?

• 1+

• 2+

• 1-

• 2-

How do the oxidation numbers of elements in a compound relate to the compound's charge?

• They are always zero

• They are always positive

• They are always negative

• They add up to the compound's charge

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

• 0

• 1+

• 1-

• 2+

What is the oxidation number of oxygen in most compounds?

• 1+

• 0

• 3-

• 2-

In manganese(II) hydroxide, what must the oxidation number of manganese be to balance the compound?

• 3+

• 2+

• 1+

• 4+

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

• 0

• 2

• 1

• Depends on the compound