Balancing Chemical Reactions Concepts

Balancing Chemical Reactions Concepts

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains the conservation of matter and the process of balancing chemical equations. It begins with an introduction to chemical reactions, focusing on the reaction between chlorine and sodium to form sodium chloride. The tutorial then demonstrates how to balance chemical equations, using the sodium chloride reaction as an example. It further explores the reaction between hydrogen and oxygen to form water, highlighting the importance of balancing equations to maintain the conservation of matter. The video concludes by reinforcing the key concepts of matter conservation and balanced equations.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What does the conservation of matter imply in a chemical reaction?

New atoms are formed in reactions.

Atoms rearrange to form new substances.

Atoms are lost during reactions.

Matter can be created or destroyed.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the reaction between chlorine gas and sodium, what compound is formed?

Sodium sulfate

Sodium chloride

Sodium nitrate

Sodium bicarbonate

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to balance a chemical equation?

To ensure the reaction is fast.

To conserve energy.

To reflect the conservation of matter.

To change the properties of compounds.

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the role of coefficients in balancing chemical equations?

They are used to speed up reactions.

They represent the atomic mass.

They indicate the number of molecules.

They change the chemical identity of compounds.

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the term for the small number that indicates the number of atoms in a molecule?

Subscript

Prefix

Exponent

Coefficient

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What happens if you add an extra oxygen atom to water in a chemical equation?

It becomes hydrogen peroxide.

It becomes hydrogen gas.

It remains water.

It becomes oxygen gas.

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How can you balance the equation for the formation of water?

Add more hydrogen molecules.

Add more water molecules.

Add more oxygen molecules.

Remove oxygen molecules.

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