Oxidation Numbers and Chemical Equations

Oxidation Numbers and Chemical Equations

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Olivia Brooks

FREE Resource

The video tutorial explains how to determine the oxidation numbers for each element in magnesium permanganate (MgMnO4). It starts by noting that the compound is neutral, meaning the oxidation numbers must sum to zero. Magnesium, being in group two, has an oxidation number of +2. Oxygen typically has an oxidation number of -2. The tutorial sets up an equation to solve for the oxidation number of manganese, which is found to be +7. The video concludes with a summary of the oxidation numbers for each element in the compound.

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10 questions

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1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the overall charge of magnesium permanganate?

Variable

Positive

Neutral

Negative

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the oxidation number of magnesium in magnesium permanganate?

+4

+3

+2

+1

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the typical oxidation number of oxygen in compounds?

-3

-2

0

-1

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the equation setup, what symbol is used to represent the oxidation number of manganese?

m

y

x

z

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many oxygen atoms are considered in the equation for magnesium permanganate?

2

4

3

5

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the result of multiplying four oxygen atoms by their oxidation number?

-10

-4

-8

-6

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in solving the equation for manganese's oxidation number?

Divide by 2

Multiply by 2

Subtract 16 from both sides

Add 16 to both sides

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