1. Short Hand for Chemical Reactions
Chemical Equations
Short Hand for Chemical Reactions 1

2. Chemical Equations
The chemical formulas for molecules & element symbols are used to write a summary of the chemical reaction.
The equation has two parts:
The reactants - the molecules you start with.
The products - The molecules that get made.
EX: HCl + NaOH -> H2O + NaCl
Reactants Products 2

3. Chemical Equations
The reactants are listed on the left side of the arrow.
EX: HCl + NaOH ->
Reactants
The products are listed on the right side (arrow points toward)
EX: > H2O + NaOH
Products
The arrow represents the reaction, the breaking of bonds & forming new ones. 3

4. Chemical Equations
Sometimes the activation energy or the catalyst are listed in the equation.
EX: 6CO2 + 6H2O Sunshine > C6H12O6 + 6O2
EX: H20 Platinum> 2H2 + O2 4

5. Chemical Equations
A chemical equation is said to be balanced when it has the same number of atoms of each element on both sides.
EX: Unbalanced
CO2 + H2O Sunshine > C6H12O6 + O2
EX: Balanced
6CO2 + 6H2O Sunshine > C6H12O6 + 6O2 5

6. Chemical Equations Be prepared to:
Identify the products and reactants.
Specify if the equation is balanced.
Identify the activation energy or catalyst if listed. 6

7. Chemical Equations
Question: Identify the products in the reaction below:
A B C.
HCl + NaOH -> H2O + NaCl A B C 7

8. Short Hand for Chemical Reactions
Chemical Equations
Short Hand for Chemical Reactions 8