Single and Double Displacement
Neutralization
4. Single Displacement
Element + Ionic Compound  New element + New ionic
Compound
In general,
A + BC  B + AC if the A is a metal it replaces a metal
Notice: A replaces B
A + BC  C + BA if the A is a non-metal it replaces a nonmetal
Notice: A replaces C
Example
Predict the products made when:
A) sodium chloride reacts with Calcium
B) Aluminum oxide reacts with phosphorus
5. Double Displacement
 Positive or negative ions in two dissolved ionic
compounds (aqueous) switch places
Compound + compound  new compound + new
compound
In general,
AB + CD  AD + CB
Notice how A and C (both metals) traded places
Example
Predict the products made when
A) magnesium hydroxide reacts with silver nitrate
B) Potassium iodide reacts with calcium chloride
6. Neutralization
 Special kind of double displacement reaction
 Only happens between an acid (has H as the metal)
and base (has OH as the non-metal)
 Always makes a SALT and WATER
In general,
HB + XOH  XB + H2O (also written as HOH)
Example
Predict the products made when:
A) hydrochloric acid reacts with lithium hydroxide
B) Sulfurous acid reacts with Sodium hydroxide
Homework
 Worksheet
 P. 233 Practice problems #1-2
 P. 234 Practice problems #1-3
 P. 235 Practice problems #1-2