Download presentation

Presentation is loading. Please wait.

Published byMargery Williams Modified over 5 years ago

1
Balancing Chemical Equations

2
Parts of a Chemical Equation What is a chemical equation? It is a way to symbolize what is happening in a chemical reaction. There are basic parts to a chemical equation. Reactants Products Coefficient Subscript “Yields” Arrow A + 2B AB 2

3
Coefficients vs. Subscripts A coefficient tells you how many SEPARATE atoms or molecules you have. Example: 2Fe (Means I have two SEPARATE atoms of Iron) A subscript tells you how many atoms are BONDED together. Example: O 2 (Means I have two oxygen atoms BONDED together) Fe OO

4
What if I have 2H 2 This means I have two molecules of H 2 Multiply the coefficient by the subscript 2 x 2 = 4 Hydrogen Atoms H H HH

5
Let’s Practice Counting How Many See the Worksheet….

6
Time to Balance Why balance? The Law of Conservation of Matter Matter cannot be created or destroyed. If I start with 2 Oxygens, I should end with 2…was matter destroyed? No…the equation just has to be balanced! H 2 + O 2 H 2 O

7
Add Coefficients Coefficients can be changed NEVER change subscripts – this changes the identity of the substance Add coefficients until the left side of the reaction equals the right side of the reaction. H 2 + O 2 H 2 O H = O = We need more Oxygen…add a coefficient on the right Now the number of Hydrogen changes Add a coefficient on the left side 22 2 4 42 2 2 1

8
One More Example Rb + P Rb 3 P Rb = P = Rb needs to be balanced. Add coefficients to the left side. 3 31 11 3

9
Time to Practice!

Similar presentations

© 2021 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google