Oxidation States and Numbers

The video tutorial explains how to determine the oxidation numbers for zinc hydroxide (Zn(OH)2). It introduces two methods: recognizing the hydroxide ion's charge and setting up an equation. Both methods lead to the conclusion that zinc has an oxidation number of +2. The video emphasizes that in neutral compounds, oxidation numbers sum to zero, and provides a step-by-step guide to calculating these numbers.

What is the overall charge of zinc hydroxide?

• Negative

• Variable

• Neutral

• Positive

What is the charge of the hydroxide ion?

• 1+

• 2-

• 1-

• 2+

How do the oxidation numbers in an ion relate to its charge?

• They are always positive

• They add up to the charge of the ion

• They are always negative

• They add up to zero

In the algebraic method, what is the oxidation number of oxygen typically considered to be?

• -1

• +1

• +2

• -2

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

• -2

• +1

• -1

• +2

What equation is set up to find the oxidation number of zinc using the algebraic method?

• x + 2 = 0

• x + 2(-2) + 2(+1) = 0

• x - 4 = 0

• x - 2 = 0

What is the oxidation number of zinc in zinc hydroxide?

• +1

• +2

• -2

• 0

What is the most common oxidation state of zinc?

• 0

• -1

• +1

• +2

Who is the presenter of the video on oxidation numbers for zinc hydroxide?

• Dr. D

• Dr. A

• Dr. C

• Dr. B