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TYPES OF REACTIONS(7.2)
By Justin Sloan, Lucas jones and Gary Rogers
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Classifying Reactions You can classify
reactions into different types.
There are many different types of chemical reactions there are Synthesis, decomposition, single and double replacement and also a combustion reaction.
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Single replacement Reaction A single replacement reaction is when one element
takes the place of another element in a compound. The general form is A + BC B + AC Usually when these reactions happen it is a solid
being added to a solution.
• An example is this copper wire in a silver nitrate solution the solution turns blue and the copper wire has silver crystals on it.
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Double replacement Reaction
A double replacement reaction is when two different compounds exchange positive ions and form two new compounds.
This is the general form of a double replacement reaction.
• In order for a double replacement reaction to occur both elements must be soluble in water
• They usually take place when two solutions are mixed together
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• Reduction is when an element gains electrons during a chemical reaction.
• Reduction occurs when the oxidation number of an atom decreases.
Reduction
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Combustion Reaction
A combustion reaction is when a substance reacts with oxygen.The reaction takes place when a fuel and oxidant react which produces heat or heat and light. The most recognizable form of a combustion is a flame
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Oxidation Oxidation is any process
when an element loses electrons during a chemical reaction.
An example of this would be calcium reacting with oxygen.
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Synthesis Reaction A synthesis reaction is a reaction when
two or more substances react to form a single substance.
For the reaction to work there has to be a cation and an anion
An example of this would be sodium metal reacting with chlorine to form sodium chloride.
2Na(s) + Cl2(g) 2NaCl(cr)
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Decomposition Reaction A decomposition reaction is a
reaction when a compound breaks down into two simpler substances.
This reaction often requires exposure to a catalyst such as heat or a solvent.
An example would be water being broken down into hydrogen and oxygen.
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Quiz1. Name two types of reactions.2. What happens during oxidation.3. What does a synthesis reaction require for it to react.4. Give an example of a decomposition reaction5. What does a combustion reaction produceNext five are true or false6. A decomposition reaction is when a compound breaks
down into simpler substances7. A combustion reaction is when it reacts with magnesium8. Reduction is when an element loses electrons9. Double replacement reaction is when compounds
exchange positive ions10. A synthesis reaction forms a single substance
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Answer Key1. Any reaction listed in the PowerPoint2. Process when an element loses electrons3. Cation and anion4. Any reaction when a compound breaks down into simpler
substances5. Heat or heat and light6. True7. False8. False 9. True10. True
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Work cited (2003-2013): 1. Print.
<http://www.wisegeek.com/what-is-a-decomposition-reaction.htm>.
http://hyperphysics.phy-astr.gsu.edu/hbase/chemical/oxred.html
n. page. Print. <http://www.east-buc.k12.ia.us/03_04/CE1/KE/k_e4.htm>.
http://www.iun.edu/~cpanhd/C101webnotes/chemical%20reactions/combustion.html