Lesson 30
This presentation is the property of its rightful owner.
Sponsored Links
1 / 12

Lesson 30 What is a chemical equation? PowerPoint PPT Presentation


  • 45 Views
  • Uploaded on
  • Presentation posted in: General

Lesson 30 What is a chemical equation?. When you tear a piece of paper into tiny pieces, you still have paper, right?. No chemical changes have been made to the paper, only physical changes. No new properties were made. The paper has the same chemical makeup.

Download Presentation

Lesson 30 What is a chemical equation?

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Lesson 30 what is a chemical equation

Lesson 30

What is a chemical equation?


Lesson 30 what is a chemical equation

When you tear a piece of paper into tiny pieces, you still have paper, right?

No chemical changes have been made to the paper, only physical changes.

No new properties were made. The paper has the same chemical makeup.


Lesson 30 what is a chemical equation

A change like tearing paper is called a physical change.

Physical change is when there is a change in the appearance only. The chemical makeup of the matter is exactly the same.


Lesson 30 what is a chemical equation

What happens if you burn paper?

You no longer have paper.

Paper is a compound made up mostly of carbon and hydrogen.


Lesson 30 what is a chemical equation

When paper burns, it links up with oxygen from the air. Three products form: ash, water, and carbon dioxide.

When paper burns, there is a change in the way atoms link together. New products form, and properties change.


Lesson 30 what is a chemical equation

A change like burning paper is called a chemical change.

In a chemical change, the chemical makeup of a substance changes.

New products are formed, properties change.


Lesson 30 what is a chemical equation

A chemical change is caused by a chemical reaction.

The “story” of a chemical reaction is told by a chemical equation.


Lesson 30 what is a chemical equation

A chemical equation shows two things.

-which substances we start with (reactants)

-which substances we end up with (products)


Lesson 30 what is a chemical equation

This is an example of a chemical equation:

Fe + S FeS

This equation describes the chemical reaction that takes place when a mixture of iron (Fe) and sulfur (S) is heated.


Lesson 30 what is a chemical equation

Fe + S FeS

The Fe and S are the reactants.

The FeS (iron sulfide) is the product.

The arrow means “produces” or “yields”.


Lesson 30 what is a chemical equation

The properties of iron sulfide are different from those of iron or sulfur.

In any chemical equation:

-the reactants are on the left side of the arrow.

-the products are on the right side of the arrow.


  • Login