Balancing Chemical Equations: Mastering the Art of Coefficients

Balancing Chemical Equations: Mastering the Art of Coefficients

Assessment

Interactive Video

Chemistry, Science, Physics

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains how to balance chemical equations. It starts by writing the given formula with reactants on the left and products on the right. The tutorial then guides viewers on counting the number of atoms for each element on both sides of the equation. If the numbers are not equal, coefficients are added to balance the equation. The tutorial emphasizes that subscripts cannot be changed and are multiplied by the coefficient. Finally, it provides tips for ensuring the equation is balanced, noting that if no coefficient is present, it is assumed to be one.

Read more

9 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first step in balancing a chemical equation?

Add coefficients to the products.

Write the reactants and products with an arrow between them.

Count the number of atoms on each side.

Change the subscripts of the compounds.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the equation H2 + O2 = H2O, how many hydrogen atoms are on the left side?

2

1

4

3

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is the equation H2 + O2 = H2O not balanced?

There are more oxygen atoms on the right.

The number of hydrogen atoms is not equal on both sides.

The number of oxygen atoms is not equal on both sides.

There are more hydrogen atoms on the left.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the purpose of adding coefficients in a chemical equation?

To decrease the number of reactants.

To increase the number of products.

To balance the number of atoms of each element on both sides.

To change the chemical properties of the compounds.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What coefficient is added before H2O to balance the oxygen atoms in the equation?

1

4

2

3

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

After adding a coefficient to H2O, how many hydrogen atoms are on the right side?

4

5

3

2

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What coefficient is added before H2 to balance the hydrogen atoms in the equation?

2

1

3

4

8.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the final balanced equation for H2 + O2 = H2O?

H2 + O2 = H2O

2H2 + O2 = 2H2O

H2 + 2O2 = 2H2O

2H2 + 2O2 = 2H2O

9.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

If there is no coefficient in front of an element, what is it assumed to be?

3

2

1

0