Balancing Chemical Equations Concepts

Balancing Chemical Equations Concepts

Assessment

Interactive Video

Chemistry, Science, Physics

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains chemical reactions and equations, focusing on word and symbol equations. It demonstrates how to balance chemical equations using examples like methane combustion and sulfuric acid reaction. The process involves ensuring equal numbers of each atom on both sides of the equation, using trial and error, and adjusting coefficients without altering chemical formulas.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What are the substances called that are present on the left side of a chemical equation?

Reactants

Products

Catalysts

Inhibitors

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a chemical equation, what does the arrow represent?

The temperature of the reaction

The direction of the reaction

The pressure of the reaction

The speed of the reaction

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why is it important to use O2 instead of O in chemical equations?

Oxygen is a metal

Oxygen is a noble gas

Oxygen exists as a diatomic molecule

Oxygen is a compound

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the first rule of balancing chemical equations?

Add new elements

Change the big numbers

Change the little numbers

Remove elements

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Why can't we use fractional numbers when balancing chemical equations?

Equations must have whole numbers

It changes the type of substance

Fractions are not allowed in chemistry

It makes the equation too complex

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How do you increase the number of oxygen atoms on the left side of the equation?

Add more CO2 molecules

Add more H2O molecules

Add more CH4 molecules

Add more O2 molecules

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In the example of sulfuric acid and sodium hydroxide, which element should be balanced first?

Sulfur

Sodium

Hydrogen

Oxygen

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