Chemical Reactions
Vocabulary
Balancing Chemical Equations
How to Balance Equations
Random Facts
100
What is the Reactant of the chemical equation and where is it located?
The reactant is the original equation and it is always located on the left side of the equation.
100
By definition, the Law of Conservation of Mass states that matter (mass) may not be __________ nor _________ .
What is created / destroyed.
100
Balance the following equation: _____H2 + ____O2 ---> ____H2O
2 H2 + 1O2 ---> 2H2O
100
What is the FIRST step to balancing chemical equations?
Draw a T-Chart and list the elements
100

What is Scotland's national animal?

Unicorn

200
What is the Product of a chemical equation and where is it located?
The product is the chemical change or new substance. It is always located on the right side of the equation.
200
This is the force that holds atoms in a compound together. (Hint: think small!!!)
What is chemical BOND?
200
Balance the following Equation: _____KClO3 ---> KCl + ______O2
2KClO3 ---> 2KCl + 3O2
200
Which part of the chemical equation are you to add or change.
The Coefficients
200

Akerson's favorite scientist.

Isaac Newton

300
Identify the reactants and products in the following chemical equation: H2 + NaCl ---> H2Na + Cl + S
Reactants: H, Na, Cl Products: H, Na, Cl, S
300
Twelve grams of reactant X react with fifteen grams of reactant Y. This is the total mass of the product(s).
What is twenty seven grams?
300
Balance the following equation: ____C3H8 + _____O2 ---> ____CO2 + ____H2O
1C3H8 + 5O2 ---> 3CO2 + 4H2O
300
Within a chemical formula, if you don't see a subscript, you can conclude that there are how many atoms of that element within each molecule.
One
300

Where did Abraham Lincoln keep his important papers?

In his tophat.

400
What does the law of conservation of mass states?
The law of conservation of mass states that matter durning a chemical change can neither be created nor destroyed.
400
This statement explains the difference between exothermic and endothermic reactions.
What is endothermic rxns result in lower temperatures (energy is a reactant) while exothermic rxns result in higher temperatures (energy is a product)?
400
Balance the following equation: ____P + _____O2 --->_____P2O5
4P + 5O2 ---> 2P2O5
400
What is the THIRD step of balancing a chemical equation?
The third step is to adjust the coefficient of each molecule to balance out equally.
400

What game you can play with your dog used to be an olympic sport?

Tug of war.

500
What is the meaning of a subscript? Also, how many atoms does each element have in the following chemical equation: NaOH + H2CO3 ---> Na2CO3 + H2O *Note - All the numbers are subscripts
A subscript is written below. Reactant - 1Na, 4O, 3H, 1C Product - 2Na, 1C, 4O, 2H
500
This is a way to speed chemical reactions.
Answers may vary, but should include: higher temperature, higher concentration of reactants, or increased surface area.
500
Balance the following equation: ___NaBr + ____CaF2 ---> ____NaF + ____CaBr2
2NaBr + 1CaF2 ---> 2NaF + 1CaBr2
500
What is one reason that we balance chemical equations?
To validate that the Law of Conservation of Mass is true.
500

What other animal proposes to find a lifelong mate?

A penguin, and with a pebble instead of a ring.

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