Class Blog 10/09/13

Class Blog 10/09/13

Beginning of Class

1. Check in homework

• Word Equations
• Balancing Chemical Equations
• Section 3.4 Notes

2. Pick up Handouts

• Six sheets total
  3. Go over homework, answer any questions
  4. Pop Quiz on balancing chemical equations

  Balance MgSO4 + NH4OH → (NH4)2SO4  + Mg(OH)2

  
  

  MgSO4 + 2NH4OH → (NH4)2SO4  + Mg(OH)2

Notes

1. Combination Reaction

• A + B → AB
• Two elements combine to make a compound

2.Decomposition Reaction

• AB → A + B
• A compound breaks up into simple elements

3.Combustion Reaction

• CxHy + O2 → CO2 + H2O
• A compound made of H and C reacts with O2 to make CO2  and H2O

4.Single Replacement Reactions

• A + BC → B + AC
• If the element is a metal it replaces the metal (positive) ion
• If the element is a nonmetal it replaces the nonmetal (negative) ion
• Places only get replaced if the single element is higher up on the Activity Series Chart  than the element in the compound

5.Double Replacement Reactions

• AB + CD → CB + AD
• Activity Series Chart is not used in this
• Two ionic compounds trade positive (front) ions
  
  
  
  
  
  

The next scribe is Dorothy W.