1. Reaction Time
By: Natalie Hotaling

2. Chemical Reactions: When something undergoes a chemical change
A chemical equation is a representation of a chemical reaction in which the reactants and products are expressed as formulas, and they are used to summarize the reaction with words.
C+O CO2
The arrow in the equations stands for results in or yields. This equation would be read
“The reaction of carbon and oxygen yields carbon dioxide.”
These reactions are balanced, as stated in the law that in order to show mass is conserved during a reaction the equation must be balanced.
Chemical reactions take place because when a chemical change takes place something else occurs.

3. Reactants vs. Products
Reactant- substance that undergoes a change in a reaction.
Product- the new substance formed as a result of the reaction.

4. Peanut Butter + Jelly = one sandwich
Synthesis Reactions
A reaction in which two or more substances react to form a single substance. Ex: Sodium reacting with Chlorine forming Sodium Chloride.
How to remember?
Peanut Butter + Jelly = one sandwich
A + B AB
2NA + Cl NaCl

6. Decomposition Reactions
A reaction in which a compound breaks down into two of more simpler substances. Ex: When electricity passes through water it decomposes into Hydrogen gas and Oxygen gas.
How to remember?
When you take a sub apart it becomes the bread, cheese, meat, etc.
A + B AB
AH2O H2 + O2

8. Single Displacement
A reaction in which one elements takes the place or another element in a compound. Ex: dipping copper wire into silver nitrate and water and then copper replaces the silver in the silver nitrate to form copper (II) nitrate.
How to remember?
You introduce your best friends to each other… suddenly they’re best friends and never call you
A + BC B + AC
Cu + 2AgNO Ag + Cu(NO3)2

10. Double Displacement
A reaction in which two different compounds exchange positive ions and form two new compounds. Ex: When potassium iodide solution is poured into a solution of lead (II) nitrate yellow precipitate is formed.
How to remember?
When dancing you swap your partner with another’s
AB + CD AD+ CB
Pb(NO3) 2 + 2KI PbI2 + 2KNO3

12. The End