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Physical Science Notes 416-436
Balancing Chemical Equations
Tips and Tricks
Chemical and Physical Changes and properties
Periodic Table of the Elements: Properties of Elements
Atomic Theories and discoveries
Bohr Model
The Naming of Binary Compounds
Octet Rule/Elemental Happiness
Balancing Chemical Equations
pH Math
Acid Rain
Review Questions
Review tests
Testing for H2, CO2 and O2 Lab
Conductivity Lab
Colour your world Lab
pH Lab
Isn't it Ionic Lab
Titration Lab 1 and 2
How to write a lab report
Tutoring Schedule
Fun Facts
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Balancing can be hard, but if you break it down its not so bad

Balancing Chemical Equations


The goal in balancing a chemical equation is to have an equal reactant and product.


Things to remember:



They are separated, not chemically bonded

Think of this: 

                Big people dont need to hold   

                hands to cross the street.

They are chemically bonded.

Think of this:

      Little people need to hold hands before          

      they can cross the street.

*Note: This only applies to drawing chemical equations*


How to balance a chemical equation:


The equation we will use will be: Li2 + H2O ---> LiOH


1. To make things easier, always show yourself what you are working with.

Li2 + H2O ---> LiOH

2 Li    2H          1Li




            -If it is part of the same compound write them under each other

-How do you tell if its the same compound? Simple, compounds and/or elements will be separated by a + sign or an arrow ---> etc.

-To help yourself always write elements down as you see them. If you have Li dont write li or LI. It gets confusing and often problems arise.


2. Next you start the balancing.



-Always do your Hydrogen (H) and then Oxygen (O) last. There is usually a lot of them and less of the other elements. Do the others first.


3. Check over your work.



-Re-doing the question never hurts. Re-do the question on the side if time allows it. But DO NOT look at your previous answer while re-doing. Covering and re-doing it is best.

-Compare your answers. If there is something wring between the two re-do it again.

-Count how many of an element you have on each side (reactant = product) comparing your Hs then your Os last.


4. Drawing the balanced chemical equation.

-Before you can begin your drawing of chemical equations, you must balance them first. In this case within steps 1-3 we balanced an equation, so we will sue the same one: Li2 + H2O ---> 2LiOH

-You must draw a legend stating what symbol you will be using to represent each element.


-Check over whether or not your drawing is correct. To do so count the amount of each symbol you have on each side and compare it to the amount on the other. Also compare the balanced chemical equation to your picture a few times.

-Finally if time allows, re-do the drawing on the side and compare your results.

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