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Table of Contents
Background knowledge
Background knowledge
Bring your background information from materials science.
Learning Intentions
Learning Intentions
To learn how we represent chemcial reactions
To learn the law of conservation of mass
To learn how to balance chemical reactions
Success Criteria
Success Criteria
I can label the parts of a chemical reaction
I can state the law of conservation of mass
I can balance a chemical equation
Engage
Engage
What do all of these images have in common?
In groups make a list of everything you can think of that is similar about the.
New Information
New Information
What is a chemcial reaction?
What is a chemcial reaction?
A chemical reaction is a rearrangement of atoms.
The starting reactants and ending products are completely different molecules.
We represent a chemical reaction using a chemical equation.
What makes up a chemical reaction?
What makes up a chemical reaction?
Reactants - These are the chemicals that go into a reaction, before they have changed.
Products - These are the chemicals that come out of a reaction, after they have been changed.
State of Matter - Tells us the state, but can also tell us the amount of energy in the reaction.
Reaction arrow - Tells us the direction of the reaction
Subscript - It tells us how many of the element is present in the compound.
Coefficient - It tells us how many of each compound there is.
Law of Conservation of Mass
Law of Conservation of Mass
"Matter can neither be created or destroyed, only changed from one form to another"
This means we cannot make chemicals appear or disappear, but we can change their properties through reactions.
We need to represent this in our chemcial equations too, this is what the coefficients are for.
Balancing chemical equations
Balancing chemical equations
We must balance equations so that the atoms/elements on both sides of the chemical equation are equal.
We do this is a nice series of steps.
Write the unbalanced equation
List out the elements
Do a count of each element
Balance both sides using lowest common multiples
Place multiples in front of the molecules.
Balancing Chemical Equations
Balancing Chemical Equations
Reflection
Reflection
Written Reflection
Written Reflection
What did you struggle with?
What was really easy?
What are you still curious about?
Success Criteria
Success Criteria
Which level are you currently sitting at in the success criteria?
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