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The part of atoms that are affected in chemical
reactions are electrons.
What’s happening?! Atoms of a same or different
element are rearranging themselves to form a new
substance through a chemical bond.
Chemical Bond = Any of several forces or mechanisms, especially the
ionic bond, covalent bond, and metallic bond, by which atoms or ions are
bound in a molecule or crystal.
Reactants = A substance participating in a chemical reaction, especially
one present at the start.
Product = A substance obtained from another substance through
chemical change.
Example = Na + Cl = NaCl
In this formula the Na + Cl are the reactants and the NaCl is the product.
In a chemical formula the reactants will always be on the left and the
product will always be in the right.
 It
states = States that mass is neither
created nor destroyed in any ordinary
chemical reaction.
 It relates because in a chemical reactions
nothing is created or lost. what you end
up with after the reaction may not look
the same as when it started but there's
the same amount off mass. Some may be
gas while the rest is solids or liquids or
whatever.
Change in color
Change Of Smell Or Taste
Formation Of Precipitation
More Signs Of A Chemical
Reaction
Change Of Temperature
Change In Electrical Conductivity
Bubbles Or Gas Appears
Even More Signs Of A Chemical
Reaction
Light is emitted
Change in volume
A change in melting or boiling point
Change in any distinctive chemical or physical property
http://www.harpercollege.edu/tmps/chm/100/dgodambe/thedisk/chemrxn/signs.htm
http://wiki.answers.com/Q/What_are_the_5_signs_of_a_chemical_re
action
The
role of energy is that it is
being exchanged.
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Chemical potential energy = a form of potential energy
related to the structural arrangement of atoms or
molecules.
Activation energy = The least amount of energy
needed for a chemical reaction to take place.
When a chemical reaction is happening energy is
released. For example, in an exothermic reaction the
energy is being released in heat form.
Exothermic
= a chemical
reaction that releases heat
Endothermic = a chemical
reaction that absorbs
energy in the form of heat.
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melting ice cubes
melting solid salts
evaporating liquid water
converting frost to water vapor
splitting a gas molecule
separating ion pairs
cooking an egg
baking bread
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reaction of barium hydroxide octahydrate crystals with
dry ammonium chloride
dissolving ammonium chloride in water
reaction of thionyl chloride (SOCl2) with cobalt(II)
sulfate heptahydrate
mixing water and ammonium nitrate
mixing water with potassium chloride
reacting ethanoic acid with sodium carbonate
photosynthesis
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What is it?! The forming or building of a more complex
substance or compound from elements or simpler
compounds.
How can you tell?! In a synthesis reaction two or more
simple substances combine to form a more complex
substance. Two or more reactants yielding one product
is another way to identify a synthesis reaction.
 An
example of synthesis sticking a lit
wooden splint into a test tube of zinc and
hydrochloric acid.
 For this lab we had to put some zinc
metal into a test tube wit hydrochloric
acid. Next we had to light a splint and
stick it in the test tube producing a
popping sound.
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What is it?! The breaking down of chemical reactants
back into simple substances.
How can you tell?! In a decomposition reaction a more
complex substance breaks down into its more simple
parts. One reactant yields 2 or more products.
 An
example of decomposition is heating
sodium bicarbonate and then sticking a lighted
splint into the test tube with the sodium
bicarbonate to see if there’s oxygen or carbon
dioxide in the test tube.
 For this lab we had to collect a test tube and fill
it with sodium bicarbonate. Then hold the test
tube over a lit candle for about two minutes.
Next we had to light a wooden splint and stick
it in said test tube.
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What is it?! Rapid oxidation accompanied by heat and,
usually, light.
How can you tell?! Combustion reactions always involve
molecular oxygen O2.
 One
example of combustion is burning
magnesium.
 For this lab we had to collect a
candle(and light it) and a magnesium
ribbon. We then had to pick up the
magnesium ribbon with our tongs. Next
we had to place the ribbon on the
candles flame.
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What is it?! This reaction is when in a reaction a single
uncombined element replaces a part of another
compound forming into a different compound.
How can you tell?! In a single replacement reaction a
single uncombined element replaces another in a
compound. Two reactants yield two products.
 An
example of a single replacement is
when we put aluminum foil into a beaker
filled with CuCl2.
 For this lab we had to pour CuCl2 into a
beaker. Then we put a piece of crumpled
up aluminum foil into said beaker and
watched it react.
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What is it?! A chemical reaction between two
compounds where the positive ion of one compound is
exchanged with the positive ion of another compound.
How can you tell?! In a double replacement reaction
parts of two compounds switch places to form two new
compounds. Two reactants yield two products.
 An
example of double replacement is
when we mixed together sodium sulfate
and barium chloride.
 For this lab we had to pour sodium sulfate
into one test tube and then we had to
pour barium chloride into another test
tube. Next we mixed them together.
What are the five signs of a chemical reaction?
http://wiki.answers.com/Q/What_are_the_5_signs_of_a_chemical_reaction
Signs Of A Chemical Reaction http://www.harpercollege.edu/tmps/chm/100/dgodambe/thedisk/chemrxn/signs.htm
Exothermic Reactions http://www.enotes.com/forensic-science/exothermicreactions
Endothermic http://en.wikipedia.org/wiki/Endothermic
Endothermic Reaction Examples
http://chemistry.about.com/od/lecturenotesl3/a/endorxns.htm
What are some examples of endothermic and exothermic reactions?
http://chemistry.about.com/od/lecturenotesl3/a/endorxns.htm
Top Ten Amazing Chemical Reactions http://listverse.com/science/top-10amazing-chemical-reactions/
To React Or Not To React? That is the question!
http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemt
ype.htm
Chemical Synthesis
http://www.usoe.k12.ut.us/CURR/Science/sciber00/8th/matter/sciber/chemt
ype.htm
Chemical Synthesis http://en.wikipedia.org/wiki/Chemical_synthesis
Chemical Decomposition
http://en.wikipedia.org/wiki/Chemical_decomposition
Combustion http://en.wikipedia.org/wiki/Combustion
Reaction Types: Single Replacement
http://en.wikipedia.org/wiki/Combustion
Reaction Types: Double Replacement
http://dbhs.wvusd.k12.ca.us/webdocs/Equations/DoubleReplaceme
nt.html
What happens during a chemical reaction?
http://www.enotes.com//science-experiments-projects/chemicalproperties/what-happens-during-chemical-reaction
The Law Of Conservation Of Mass
http://www.mi.mun.ca/users/edurnfor/1100/atomic%20structure/tsld
004.htm