Oxidation Numbers and Carbonate Ions

Oxidation Numbers and Carbonate Ions

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Mia Campbell

FREE Resource

The video tutorial explains how to find oxidation numbers for elements in PbCO3, focusing on the carbonate ion's charge and the oxidation numbers of lead and carbon. It uses rules from the periodic table and basic arithmetic to determine these values, concluding with a recap of the process.

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9 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary goal when finding oxidation numbers in PbCO3?

To calculate the number of atoms

To find the oxidation numbers of each element

To identify the charge of each element

To determine the molecular weight

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the charge of the carbonate ion (CO3)?

1+

2-

0

3-

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why does lead (Pb) have an oxidation number of +2 in PbCO3?

Because it is a metal

Because it balances the charge of the carbonate ion

Because it forms a covalent bond

Because it is in Group 2 of the periodic table

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the typical oxidation number of oxygen in compounds?

+2

-2

0

-1

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many oxygen atoms are present in the carbonate ion?

4

3

2

1

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What equation is set up to find the oxidation number of carbon in PbCO3?

2 + x - 6 = 0

x + 2 = 6

x - 2 = 6

2x - 6 = 0

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the oxidation number of carbon in PbCO3?

+3

+2

+4

+5

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

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

-1

1

2

0

9.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What rule is used to determine the oxidation number of oxygen?

Oxygen is always +2

Oxygen is always -2 with few exceptions

Oxygen is always -1

Oxygen is always neutral