Balancing Equations Introduction

Introduction to Balancing Chemical Equations

Multiple Choice

What are the reactants in this chemical reaction:

• Ca and H2O

• Ca(OH)2 and H2

Multiple Choice

What are the products in this chemical reaction:

• Ca and H2O

• Ca(OH)2 and H2

Open Ended

What is a subscript?

Open Ended

What does a subscript tell you?

Open Ended

What is a coefficient?

Open Ended

What does a coefficient tell you?

Multiple Choice

How many Fe atoms are on the reactant side?

• 1

• 2

• 3

Multiple Choice

How many Cl atoms are on the product side?

• 1

• 2

• 3

A silver spoon tarnishes. The silver reacts with sulfur in the air to make silver sulfide, the black material we call tarnish.

Multiple Choice

Which chemical formula(s) represents the reactants?

• Ag and S

• Ag2S

Multiple Choice

Which chemical formula(s) represents the products?

• Ag and S

• Ag2S

Multiple Choice

How many of Ag (silver) is present in the reactants?

• 1

• 2

• 3

• 4

Multiple Choice

How many of S (sulfur) is present in the reactants?

• 1

• 2

• 3

• 4

Multiple Choice

How many of Ag (silver) is present in the product?

• 1

• 2

• 3

• 4

Multiple Choice

How many of S (sulfur) is present in the product?

• 1

• 2

• 3

• 4

Multiple Choice

Is this a balanced equation?

• Yes

• No

Silicon, the second most common element in Earth's crust, is commonly used in semiconductors and electronics. Since it is naturally found in quartz, it is necessary to heat the quarts with carbon to separate the silicon.

Multiple Choice

Which chemical formula(s) represents the reactants?

• Si and 2CO

• SiO2 and 2C

Multiple Choice

Which chemical formula(s) represents the products?

• Si and 2CO

• SiO2 and 2C

Multiple Choice

How many of each atom of Si (Silicon) is present in the reactants?

• 1

• 2

Multiple Choice

How many of each atom of O (Oxygen) is present in the reactants?

• 1

• 2

Multiple Choice

How many of each atom of C (Carbon) is present in the reactants?

• 1

• 2

Multiple Choice

How many of each atom of C (Carbon) is present in the products?

• 1

• 2

Multiple Choice

How many of each atom of Si (Silicon) is present in the products?

• 1

• 2

Multiple Choice

How many of each atom of O (Oxygen) is present in the products?

• 1

• 2

Multiple Choice

Is this a balanced equation?

• Yes

• No