Reaction or Not?
An old bike left outside is turning brown and rusty.
It's a chemical reaction!
N2+H2-->NH3
List the reactant(s) you see here exactly as they are written.
N2
H2
What is the one thing you need to do in order to tell if an equation is balanced?
There are several possible answers
What is the name of one resource we use in Chemistry class?
Several possible answers
I throw away a paper towel.
It is not a chemical reaction.
N2+ H2--> NH3
List the product(s) as they are written.
NH3
Is this equation balanced?
N2 + H2 --> NH3
What element does Rf stand for?
Rutherfordium
I light a candle.
It is a chemical reaction.
How many different types of reactants are there in the below:
P + O2-->P2O5
Two different types
Explain why this equation is not balanced.
N2 + H2 --> NH3
There is more Nitrogen on the reactants side than the Products side.
How many rows are there in the Periodic Table?
7
I cook a cheeseburger on a grill.
It is a chemical reaction.
How many different types of products are there in the reaction below:
P + O2--> P2O5
One type of product
Tell one thing you could try to balance this equation.
S8 + O2 --> SO3
You could add a coefficient of 8 in front of the product.
You could add a coefficient of 12 in front of O2
Describe one thing you've learned in this class.
Many different answers
I left the bowl on the counter and my ice cream melts.
It is not a chemical reaction. It is a change in state of matter. I could put my melted ice cream back in the freezer and it would become ice cream again.
Is there more H in the products or the reactants?
Na + H2O --> NaOH + H2
In the products
Ag2O --> Ag + O2
Tell whether this is balanced and how you know.
This is not balanced because there is more Ag in the reactants. There is also more O in the products.
Describe one difference between a chemical reaction and a physical change.
A chemical reaction is not easily undone or reversible.