Lesson 30
Download
1 / 12

Lesson 30 What is a chemical equation? - PowerPoint PPT Presentation


  • 108 Views
  • Uploaded on

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.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about ' Lesson 30 What is a chemical equation?' - zaza


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?


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.


A change like tearing paper is called a have paper, right?physical change.

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


What happens if you burn paper? have paper, right?

You no longer have paper.

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


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.


A change like burning paper is called a Three products form: ash, water, and carbon dioxide.chemical change.

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

New products are formed, properties change.


A chemical change is caused by a Three products form: ash, water, and carbon dioxide.chemical reaction.

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


A chemical equation shows two things. Three products form: ash, water, and carbon dioxide.

-which substances we start with (reactants)

-which substances we end up with (products)


This is an example of a chemical equation: Three products form: ash, water, and carbon dioxide.

Fe + S FeS

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


Fe + S FeS Three products form: ash, water, and carbon dioxide.

The Fe and S are the reactants.

The FeS (iron sulfide) is the product.

The arrow means “produces” or “yields”.


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.


ad