1. Unit: Chemical Reactions
Day 6 - Notes
Unit: Chemical Reactions
Types of Chemical Reactions: Double Replacement and Combustion
Upper left: Thermite reaction, Fe2O3 + Al => 2Fe +2Al2O3 + HEAT!!!
Upper right: potassium in water, K + H2O => KOH + H2 + HEAT
Bottom right: potassium chlorate and sugar, C12H22O11 + 8KClO3 => 12CO2 + 11H2O + 8KCl + HEAT!!!
Bottom left: magnesium reacting with oxygen, Mg + O2 => MgO

2. After today you will be able to…
Identify a double replacement and combustion reaction
Predict the products in words for single replacement reactions
Predict the products in formulas for a combustion reaction
Balance combustion reactions
heat Pt

3. Compound + Compound  Compound +Compound
Predicting Products
Double Replacement/Displacement: Two ionic compounds react to form two new compounds by exchange of ions
Common form:
All double replacement reactions produce either water, a precipitate or a gas
Compound + Compound  Compound +Compound
AB + CD  AD + CB
heat Pt

4. Examples of double replacements:
copper (I) + beryllium  sulfate oxalate
copper (I) + beryllium
oxalate sulfate
Do not use the activity series for these reactions!
heat Pt

5. Examples of double replacements:
A neutralization reaction is a type of double replacement reaction. Neutralization reaction: Is a reaction between an acid and a base (base – a metal hydroxide, ex: NaOH). The product is metal salt and water always
heat Pt

6. Example of a neutralization:
aluminum nitric  hydroxide acid
hydrogen nitrate
aluminum water
nitrate
Water will always be a product!
heat Pt