Physical Science Pages 199-205 Ms. Cilli December5, 2011 Physical Science Pages 199-205 Ms. Cilli...
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Transcript of Physical Science Pages 199-205 Ms. Cilli December5, 2011 Physical Science Pages 199-205 Ms. Cilli...
Types of Chemical Reactions
Physical Science Pages 199-205
Ms. CilliDecember5, 2011
What are the five main types of chemical reactions?
Review them as we wait
Objectives
• Classify chemical reactions as• synthesis • Decomposition• single-replacement• double-replacement• combustion reactions
Explain what is happening.
+ + +
TYPES OF REACTIONSNot all reactions are created equal!
Chemical Types of ReactionsSynthesis
Decomposition
Single-replacement
Double-replacement
Combustion
BOR NOTES V1
• Each group will be assigned a type of reaction
• You will answer the questions
• When all is done, we will come back to class and a group member will present the notes to the rest of the class
BOR NOTES V2
• You will answer the questions
• Each person needs to answer ____ questions
• Save your work, these are the notes for today
Synthesis• A reaction where
_________________________________
• The reactants may be either ________ or ________
• The _______ synthesized is always a ___________
Synthesis• A general reaction:
• Example:
Decomposition
• Opposite of a _________ reaction
• A __________ breaks down into _________
• The reactant must be a ___________
• The products may be _______ or ________
Synthesis• A general reaction:
• Example:
Decomposition
Single-Replacement
• A ________________ is a reaction in which _________ takes the ______ of ________ element
• General equation:
• Example:
Double - Replacement
• Where two _______ compounds exchange ________ and form _____ new compounds
• General equation:
• A replaces ___ and C replaces ____
Double - Replacement
• Example:
• Explain what is happening. What is replacing what?
Combustion
• A reaction where a _______ reacts rapidly with ___________
• _____ and _____ are often produced
• _______ will always be a carbon-containing compound and oxygen
• Products will always be ________ and ________
Combustion
• General Equation:
• Example:
• What are the reactants in the example? Products?
Chemical Reaction using Electrons
Oxidation Reduction• Occurs when a cation (metal) loses an ____________
•A reactant is _________ if it loses electrons
•Occurs when an anion (nonmetal) gains an ____________
•A reactant is _________ if it gains electrons
Ger!!!
Oxidation and Reduction
Lose
Electrons
Oxidized
Goes
Gain
Electrons
ReducedLeo
CLASSIFYING REACTIONS BOR
• On the next slide is four reactions ( you will need to answer one question)
• Classify them as synthesis, decomposition, single replacement, double replacement, or combustion.
• Call me in when you are done
Classifying ReactionsPb(NO3)2 + 2HCl PbCl2 + 2HNO3
Type: ___________
2C2H6 + 7O2 4CO2 + 6H2OType: ___________
Ca + 2HCl CaCl2 + H2
Type: ___________
2SO2 + O2 2SO3
Type: ___________
Classifying Reactions Answers
Pb(NO3)2 + 2HCl PbCl2 + 2HNO3
Type: Double Replacement
2C2H6 + 7O2 4CO2 + 6H2OType: Combustion
Ca + 2HCl CaCl2 + H2
Type: Single Replacement
2SO2 + O2 2SO3
Type: Synthesis
Closure
Which one is not a type of reaction?A. synthesis B. decompositionC. single-replacementD. double-replacementE. All are types of chemical reactions
Assignment: • Independent Work:– Read pages 206-209 in Physical Science– Work on the study guide (details in Schoology)
• Homework:– Section 7.2 HW – Due Tuesday, December 6th by 8PM