Chemical Reactions by 49ph3B28

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									Chemical Reactions

   Ms. Towle
Chemistry Level 4
               Chemical Change
 Chemical          Reaction
  – Reactants
  – Products
 Evidence
  –   Energy
  –   Gas
  –   Precipitate
  –   Color
  –   Water
      Chemical Equation
 Chemical       Equation
  –   Coefficient                   Arrow
  –   Subscripts                    + sign
  –   Delta symbol Δ
  –   State of matter (s) (g) (l) (aq)
         Synthesis Reaction
 Reactants

 Products

 Example    Chemical Equation
  A + X  AX
     Decomposition Reaction
 Reactants

 Products

 Example    Chemical Equation
  –AX  A + X
   Single-Replacement Reactions
 Reactants

 Products

 Example    Chemical Equation
  –A + BX  AX + B
  Double-Replacement Reaction
 Reactants

 Products

 Example    Chemical Equation
  –AY + BX  AX + BY
       Combustion Reaction
 Reactants
 Products
       Balancing Equations
 Law of Conservation of Mass
 Never change subscripts to balance

 Always change coefficients to balance

 Practice:

_AgNO3 +__MgCl2  __AgCl + __ Mg(NO3)2
    Word/Formula/Chemical
          Equations
 Word Equations
 Formula Equations

 Chemical Equations

 Example:
           Predicting Products
   Synthesis
    – Reactants
    – Product
   Decomposition
    – Reactant
    – Products
   Combustion
    – Reactants
    – Products
           Predicting Products
   Single Replacement
    – Activity Series


   Double Replacement
    – Solubility Chart
            Stoichiometry
 Stoichiometry
 Compare different substances using moles

 Balanced equation

 Dimensional Analysis
    Stoichiometry – Percent Yield
 Calculate Theoretical Yield
 Percentage formula
    Stoichiometry – Limiting Reactant
 Mole Ratio
 Calculate yield based on reactant with
  insufficient moles

								
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