T YPES OF CHEMICAL REACTIONS – P ART A Dr. Chin Chu River Dell Regional High School.
T HE D IFFERENT T YPES OF ___________________ ___________________.
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Transcript of T HE D IFFERENT T YPES OF ___________________ ___________________.
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THE DIFFERENT TYPES OF ___________________ ___________________
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THE DIFFERENT TYPES OF CHEMICALREACTIONS
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TODAY’S TARGETS:
To be able to describe
and identify 6 different types of Chemical Reactions
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WHY DO WE CARE ABOUT CLASSIFYING TYPES OF CHEMICAL EQUATIONS???
It is human nature to want to classify things.We classify music, food and ...
oClassifying allows us to PREDICT what will happen before the reaction occurs!
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HOW DO WE CLASSIFY TYPES OF REACTIONS?
Based on how the atoms become rearranged during the reaction.
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CLASSIFYING REACTIONS BASED ON ATOM REARRANGEMENT
Remember:
REACTANTS are what we start with and
PRODUCTS are what we end with2H2 + O2 2H2O
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TYPE 1- SYNTHESIS, COMBINATION OR ADDITION
Description2 or more reactants combine to make 1
single productGeneral Equation A+ B ABSpecific Example 2H2 + O2 2H2O
Analogy
boy meets girl = couple
Picture
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TYPE 2- DECOMPOSITION OR BREAKING APART
Description1 Single reactant is broken down into 2 or
more products
General EquationA BA+ B
Specific Example 2H2O2H2 + O2
Analogy
The couple Breaks up!
Picture
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TYPE 3- SINGLE REPLACEMENT OR SUBSTITUTION
Description1 single element replaces an element in a
compound
General EquationA + BC AC+ B
Specific Example Ca + MgCl2 CaCl2 + Mg
Analogy
Like one girl switching dance partners
Picture
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TYPE 4- DOUBLE REPLACEMENT
DescriptionWhen elements in 2 different compounds
switch or change places
General EquationAB + CD AD+ CB
Specific Example NaCl + KI NaI + KCl
Analogy
Like 2 pairs or sets of dancers changing partners
Picture
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Double replacement reactions produce a precipitate. This is an insoluble solid (it doesn’t dissolve) that usually sinks to the bottom of the solution.
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TYPE 5- NEUTRALIZATION
Description Acid + Base Salt + Water
General EquationHA + BOH BA+ H20
Specific Example HCl + NaOH NaCl + H2O
Hint
Will always have OH on reactant (left) side and H20 on product
(right) side
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TYPE 6- COMBUSTION OR BURNING
Description
Hydrocarbon reacts with Oxygen (O2) to produce Heat, Carbon Dioxide (CO2) and
Water (H2O)
General EquationCxHy+ O2 CO2+ H20
Specific Example CH4+ O2 CO2+ H20
Hint
Will always have CO2+ H20 on product (right) side
(methane)
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REVIEW
Atom rearrangement1) Synthesis (Combination)2) Decomposition3) Single Replacement (Substitution)4) Double Replacement5) Neutralization6) Combustion ( Burning)
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LAST NOTE:
Classifying chemical reactions is
all about PATTERNS!!!