Predicting Reactions

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

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

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

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

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

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+