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Classifying Chemical Reactions
It may seem like there are many different ways that chemicals can react!In fact, chemists have determined that are FOUR main ways that chemicals interact
Four main types of reactions:Synthesis Decomposition Single Displacement Double Displacement We will also learn about Combustion of a Hydrocarbon
Synthesis Reactions: A + B ABTwo elements combine to form a compound or two small compounds form a larger compound Example: 2Mg + O2 2MgO
Decomposition Reactions:AB A B A larger compound breaks down into two elements or two smaller compounds. Example: 2H2O 2H2 + O2
1) 2H2 + O2 2H2O ____________________Try These!! Classify each of the following reactions as synthesis or decomposition reactions. Synthesis 1) 2H2 + O2 2H2O ____________________ Decomposition 2) Na2CO3 Na2O +CO2 _____________________ 3) Hydrogen Peroxide Water + Oxygen Gas __________________ Decomposition 4) Sodium + Chlorine gas Sodium Chloride __________________ Synthesis
Single Displacement Reactions:A + BC AC + B An element takes the place of another element in a compound. Zinc has “kicked out” the hydrogen! Example: Zn + 2HCl ZnCl2 + H2
Another way to think of this!...One partner in a dancing couple gets “bumped out” by a stronger dancer! Penguin “bumps out” mouse to dance with monkey!
Double Displacement Reactions:AB + CD CB + AD Elements in different compounds switch places. Sodium and silver have switched places! Example: NaCl + AgNO3 AgCl +NaNO3
Two dancing couples switch partners!+ + Switch places
YouTube Video Five Major Chemical Reactions
Try these!!: Classify each of the following reactions as single or double displacement reactions.1) Zn + AgNO Zn(NO3)2 + Ag _____________________ Single displacement 2) CuNO3 + KCl KNO3 + CuCl ______________________ Double displacement 3) 2KCl + Pb(NO3)2 2KNO3 + PbCl2 ______________________ Double displacement 4) Al + Fe(NO3) Al(NO3)3 + Fe ______________________ Single displacement
Combustion of a Hydrocarbon Fuelwhen a fuel reacts with oxygen releasing heat Clean combustion produces: CARBON DIOXIDE and WATER Example: CH4 + O2 CO2+ 2H2O (methane)
Assignment: 1) Types of Chemical Reactions Chart2) Worksheet: Types of Chemical Reactions
Unit 7 Chemical Reactions
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Classifying Chemical Reactions
Types of Reactions 1.Synthesis reactions 2.Decomposition reactions 3.Single displacement reactions 4.Double displacement reactions 5.Combustion reactions.
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Barium and water yields iron (III) chloride. Lead (II) oxide and carbon react to make solid lead and carbon dioxide.
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