Download Chemical Reaction Basics

Advanced Chemistry – Chapter 8
A ____________ ____________ is a process by which one or more substances are
changed into one or more ____________ substances. Chemical reactions are
represented by some type of ____________. The general form is as follows:
____________ -------- ____________
Types of Equations
1. Word equations - Represent chemical reactions using words
2. Formula equations - Represent chemical reactions using formulas and symbols
3. Chemical equations – Represent chemical reactions with a balanced formula
equation
Requirements for Chemical Equations
1. Must represent all known facts (states of reactants and products, etc.)
*Assume reactions take place at room temperature unless noted otherwise*
2. Must contain correctly written formulas
3. Must satisfy the Law of Conservation of Mass (*Balanced*)
Table 1 Page 263 - **Know these formulas**
Table 2 Page 266 - ** Know these symbols**
Indicators of a Chemical Reaction
1. Evolution of both heat and light energy (Figure 1 on page 261)
2. Production of a gas
3. Formation of a precipitate
4. Color change
(Figure 2 on page 262)
Balancing Chemical Equations
Guidelines
Number out in front is called ____________
Numbers within formulas are called _____________
Total number of atoms = Coefficient x Subscript
1. Use an atom inventory
2. Balance different types of atoms one at a time
3. Balance atoms that appear only once on each side first
4. Balance hydrogen and oxygen atoms last
Examples