Balancing Chemical Equations
Balance the equation.
H2 + O2 ---> H2O
2, 1, 2
What is the law of conservation of mass?
A law of chemistry that states that in a chemical equation, no matter can be created or destroyed
What does the word synthesis mean?
To put something together or create something.
What is the reactant.
The molecules and atoms before a chemical reaction.
Where did Ms. Kauffman go to college?
University of Maine at Orono
Balance the equation.
Fe + O2 ---> Fe2O3
4, 3, 2
What is an open system and a closed system?
An open system allows some matter to escape as a gas. A closed system contains all of the same matter before and after a reaction.
What two products are present in a combustion reaction?
Water and carbon dioxide.
What side is the reactant on in a chemical equation?
On the left side of the equation.
What state is Ms. Kauffman from?
Virginia
Balance the equation.
CH4 + O2 ---> CO2 + H2O
1, 2, 1, 2
How does the popcorn experiment we conducted in class demonstrate the law of conservation of mass?
The mass was conserved with the small exception of some matter escaping in the form of a gas.
Classify the following chemical reaction.
H2CO3 ---> H2O + CO2
Decomposition reaction.
What does a coefficient mean.
How many molecules there are for 1 molecule.
Littlefoot
Balance the equation.
Al + HCl ---> AlCl3 + H2
2, 6, 2, 3
If 36 g of carbon reacts completely with oxygen to produce 126 g of carbon dioxide, what mass of oxygen was consumed?
96 g
What are the five types of chemical reactions?
Synthesis, Decomposition, Single Replacement, Double Replacement, Combustion
What can we NOT do to a subscript to balance an equation?
Change them in any way. Add or destroy them.
What is the name of the bristlenose pleco (suckerfish) in the classroom aquarium?
Lenny
Balance the equation.
H3PO4 + KOH ---> K3PO4 + H2O
1, 3, 1, 3
224g of sodium hydroxide reacts with 88g of carbon dioxide. If the reaction produces 36g of water, how much sodium carbonate is produced?
276 g
Based on reaction patterns, identify the two products formed when water undergoes decomposition.
H2 and O2
What is different about the reactant and the product? (Be specific).
The product is the molecules and atoms after the chemical equation and the reactant is the atoms and molecules before a chemical equation.
What did Ms. Kauffman research in college? (Hint: What was her research poster about)