1. Predicting Reactions

3. General equation: AB + c  AC + B
Single Displacement
General equation: AB + c  AC + B + 
Like a “girlfriend thief”

4. Single Replacement Possibilities
metals replace metals or hydrogen
(cation replaces a cation)
metals + H2O metalOH + H2
halogens replace halogens
(anion replaces an anion)
Metal OH is metal hydroxide

5. Anything on the activity series will replace anything below it
Non-metals F2
Cl2
Br2 I2
Most reactive
Least reactive
Activity Series
Metals Li Rb K Cs Ba Sr Ca Na Mg Al Ti Mn Zn Cr Fe Cd Co Ni Sn Pb H Sb Bi Cu Hg Ag Pt Au
Most reactive
Least reactive
Anything on the activity series will replace anything below it

6. Look at the reactants given and determine if the single element is a metal or a halogen
Look at the compound given in the reactants, and find the same type of element (metal or halogen) identified in step 1
Find both elements on the reactivity series

7. Look at the products formed
If the element identified in step 1 is higher on the reactivity series than the element in step 2, then they will switch places to form new products
Look at the products formed
If the single element is a diatomic molecule, it needs a subscript of 2
If your compound is not neutral; look at the charges and add subscripts to make it neutral

8. Examples 1. Zn + AgNO3 2. Cl2 + KI 3. Ag + KNO 3 4. Pb + H 2O
Activity Series
Metals Li Rb K Cs Ba Sr Ca Na Mg Al Ti Mn Zn Cr Fe Cd Co Ni Sn Pb H Sb Bi Cu Hg Ag Pt Au
Most reactive
Least reactive
Examples
1. Zn + AgNO3
2. Cl2 + KI
3. Ag + KNO 3
4. Pb + H 2O
Assume Pb 2+