Mystery A & B Lab
Patterson Lesson 3.1
Chemistry Language
• Work with a partner to try matching the
Chemistry Language Terms and Meanings
before I give you the answers.
• Each pair needs a set of the Language
Cards
Chemistry Language
TERM
ORIGINAL MEANING
EXAMPLE
YOUR MEANING
Make a “4 Square” for each Match
Chemistry Language
PHYSICAL
CHANGE
EXAMPLE
A change in which the
characteristics of a
substance are only
changed physically &
the chemical
composition stays the
same.
YOUR MEANING
Make a “4 Square” for each Match
Chemistry Language
CHEMICAL
CHANGE
A change in which a
substance is changed
into one or more new
substances with
different properties.
EXAMPLE
YOUR MEANING
Chemistry Language
LAW OF
CONSERVATION
OF MATTER
EXAMPLE
A change in which a
substance is changed
into one or more new
substances with
different properties.
YOUR MEANING
Chemistry Language
http://youtu.be/8RmVwz2fNGc
A solid that forms as a
result of a chemical
reaction. It may appear
cloudy and will fall to the
bottom of the container
over time.
EXAMPLE
YOUR MEANING
PRECIPITATE
Chemistry Language
SYMBOL
EXAMPLE
One or two letters used
to represent an element.
YOUR MEANING
Chemistry Language
CHEMICAL
FORMULA
A combination of
symbols and numbers
that represent the
number & types of
elements (atoms)
present in a compound.
EXAMPLE
YOUR MEANING
Chemistry Language
SUBSCRIPT
EXAMPLE
A small number to the
right of a symbol that is
written below the normal
line of letters to show
how many atoms of an
element are present in a
substance. No subscript
means there is only one
atom.
YOUR MEANING
Chemistry Language
CHEMICAL
REACTION
When substances
interact to form one or
more new substances
with different properties
than the original.
EXAMPLE
YOUR MEANING
Chemistry Language
CHEMICAL
EQUATION
EXAMPLE
A combination of
symbols & chemical
formulas used to
describe what happens
in a chemical reaction.
The equation identifies
the reactants & resulting
products.
YOUR MEANING
Chemistry Language
COEFFICIENT
EXAMPLE
A number written in
front of a chemical
formula to show how
many molecules of that
substance are present.
YOUR MEANING
Chemistry Language
REACTANT
EXAMPLE
Formulas written on the
left side of the arrow
symbol (->) are the
starting substances in a
chemical reaction.
YOUR MEANING
Chemistry Language
PRODUCT
EXAMPLE
Formulas written on the
right side of the arrow
symbol (->) are the new
substances formed in a
chemical reaction.
YOUR MEANING
Chemistry Language
YIELDS
EXAMPLE
An arrow symbol that
shows a reaction has
taken place. The
reactants have reacted
to produce a new
substance (the product).
YOUR MEANING
Chemistry Language
COMPOUND
A substance composed
of two or more elements
chemically combined &
in a definite proportion.
EXAMPLE
YOUR MEANING
Write the chemical equation for
Bag A in your journal?
NaHCO3 + H2O = NaHCO3 + H2O
Bag A
What are each of these parts?
NaHCO3 + H2O = NaHCO3 + H2O
Bag A
What do you call the LEFT side?
NaHCO3 + H2O = NaHCO3 + H2O
Why aren’t the terms “yield” or
“product” used in the equation
for Bag A? Why is there an
equal sign instead of an arrow?
NaHCO3 + H2O = NaHCO3 + H2O
Write the chemical equation for
Bag B in your journal?
NaHCO3 + HC2H3O2

CO2 + H2O + NaC2H3O2
What is the name of each part?
NaHCO3 + HC2H3O2

CO2 + H2O + NaC2H3O2
What is each side called?
NaHCO3 + HC2H3O2

CO2 + H2O + NaC2H3O2
WRITE AN EXPLANATION
FOR THE EXPERIMENT. USE
THE CHEMICAL LANGUAGE
TERMS WE HAVE BEEN
LEARNING.
CHEMICAL LANGUAGE
SCRAMBLE
In the baggy experiment there
was 5 grams of baking soda, 10
mL of liquid (10 mL = 10 g) & the
bag was 0.2 grams. What was
the total mass of the all the parts
after the reactants where
combined?
Identify the parts numbered 1-5.
Write the chemical formula in your journal.
1. Identify the chemical symbols and tell the
element.
2. How can you tell one element from another in a
chemical formula?
3. What parts of this chemical formula are
subscripts? Coefficient?
5C12H22011
Decoding Chemical Formulas
CO2
Elements in
formula
Number of
atoms of
element
Carbon
TOTAL
------2
____
Decoding Chemical Formulas
CO2
Elements in
formula
Number of
atoms of
element
TOTAL
Carbon Oxygen ----2
1
2
___
3
Decoding Chemical Formulas
H2O
TOTAL
Elements in
formula
Number of
atoms of
element
-------
Decoding Chemical Formulas
H2O
TOTAL
Elements in Hydrogen Oxygen ----2
formula
Number of
2
1
___
3
atoms of
element
Decoding Chemical Formulas
Zn(NO3)2
Note: Multiply the subscript outside of the parentheses by
everything inside of the parentheses.
Elements in
formula
Number of
atoms of
element
Nitrogen
TOTAL
3
2
9
Decoding Chemical Formulas
Zn(NO3)2
Elements in
formula
Number of
atoms of
element
Zinc
1
TOTAL
Nitrogen Oxygen
3
2
6
9
Decoding Chemical Formulas
5Ca(OH)2
TOTAL
Elements in
formula
Number of
atoms of
element
Decoding Chemical Formulas
5Ca(OH)2
TOTAL
Elements Calcium Oxygen Hydrogen
3
in formula
Number
5
10
10
of atoms
of
element
Sweet 16 Chemical Formula
Tournament
Sweet 16 Chemical Formula
Tournament Preliminaries
•What is a • How do
Chemical you make
Formula? zero
pairs?
• Activity! Balancing Chemical Equations.
• Activity! Balancing Chemical Equations.
– This is what happens in a chemical reaction
• Activity! Balancing Chemical Equations.
– This is what happens in a chemical reaction
– It describes what you started with…and
ended with.
• Activity! Balancing Chemical Equations.
– This is what happens in a chemical reaction
– It describes what you started with…and
ended with.
– It also describes the phases of each (s) (l) (g)
• Activity! Balancing Chemical Equations.
– This is what happens in a chemical reaction
– It describes what you started with…and
ended with.
– It also describes the phases of each (s) (l) (g)
– It also describes the amount of each.
• Balancing a chemical equation refers to
establishing the mathematical relationship
between the quantity of reactants and
products.
• Balancing a chemical equation refers to
establishing the mathematical relationship
between the quantity of reactants and
products.
– Reactant:
• Balancing a chemical equation refers to
establishing the mathematical relationship
between the quantity of reactants and
products.
– Reactant: Starting
• Balancing a chemical equation refers to
establishing the mathematical relationship
between the quantity of reactants and
products.
– Reactant: Starting
– Products:
• Balancing a chemical equation refers to
establishing the mathematical relationship
between the quantity of reactants and
products.
– Reactant: Starting
– Products: Ending
• Balancing a chemical equation refers to
establishing the mathematical relationship
between the quantity of reactants and
products.
– Reactant: Starting
– Products: Ending
• Balancing a chemical equation refers to
establishing the mathematical relationship
between the quantity of reactants and
products.
– Reactant: Starting (On the left)
– Products: Ending
• Balancing a chemical equation refers to
establishing the mathematical relationship
between the quantity of reactants and
products.
– Reactant: Starting (On the left)
– Products: Ending (On the right of the )
• In any physical or chemical change, matter
is neither created nor destroyed
Copyright © 2010 Ryan P. Murphy
• In any physical or chemical change, matter
is neither created nor destroyed
– Matter can be changed from one form to
another.
Copyright © 2010 Ryan P. Murphy
• In any physical or chemical change, matter
is neither created nor destroyed
– Matter can be changed from one form to
another.
Copyright © 2010 Ryan P. Murphy
• In any physical or chemical change, matter
is neither created nor destroyed
– Matter can be changed from one form to
another.
Copyright © 2010 Ryan P. Murphy
• In any physical or chemical change, matter
is neither created nor destroyed
– Matter can be changed from one form to
another.
Copyright © 2010 Ryan P. Murphy
• In any physical or chemical change, matter
is neither created nor destroyed
– Matter can be changed from one form to
another.
Copyright © 2010 Ryan P. Murphy
• In any physical or chemical change, matter
is neither created nor destroyed
– Matter can be changed from one form to
another.
Copyright © 2010 Ryan P. Murphy
• In any physical or chemical change, matter
is neither created nor destroyed
– Matter can be changed from one form to
another.
Copyright © 2010 Ryan P. Murphy
• In any physical or chemical change, matter
is neither created nor destroyed
– Matter can be changed from one form to
another.
Copyright © 2010 Ryan P. Murphy
• Remember the Law Conservation of Mass:
Matter cannot be created or destroyed. That
means we need to have the same amount of
chemicals on each side of the .
• For this reason, put a square around the
chemical formulas.
• Example
• Remember the Law Conservation of Mass:
Matter cannot be created or destroyed. That
means we need to have the same amount of
chemicals on each side of the .
• For this reason, put a square around the
chemical formulas.
• Example
• Remember the Law Conservation of Mass:
Matter cannot be created or destroyed. That
means we need to have the same amount of
chemicals on each side of the .
• For this reason, put a square around the
chemical formulas.
• Remember the Law Conservation of Mass:
Matter cannot be created or destroyed. That
means we need to have the same amount of
chemicals on each side of the .
• For this reason, put a square around the
chemical formulas.
• Example
• Begin balancing chemical equations by
putting numbers (coefficients) in front of
them.
• Begin balancing chemical equations by
putting numbers (coefficients) in front of
them.
– Example H2O on one side could become 2 H2O
• Begin balancing chemical equations by
putting numbers (coefficients) in front of
them.
– Example H2O on one side could become 2 H2O
– Remember that each side needs to have same
number of Hydrogen and Oxygen
• Begin balancing chemical equations by
putting numbers (coefficients) in front of
them.
– Example H2O on one side could become 2 H2O
– Remember that each side needs to have same
number of Hydrogen and Oxygen
• Note – Don’t change the subscript
• Example H2O becomes H3O
• Begin balancing chemical equations by
putting numbers (coefficients) in front of
them.
– Example H2O on one side could become 2 H2O
– Remember that each side needs to have same
number of Hydrogen and Oxygen
• Note – Don’t change the subscript
• Example H2O becomes H3O
• Balancing Equations Available Sheet.
– Complete each equation as we cover it in
class.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals. BOXES!!!
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• A way to start off the process is to create
an inventory of your chemicals.
• Now look at the inventory and begin the
process of balancing the equation.
One Sodium
One Sodium
Two Sodium
One Sodium
Two Sodium
Let’s add a 2 here and see if it balances.
2
Did it balance? Are we done?
2
Did it balance? Are we done?
We should do a new inventory chart.
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
2
5
2
2
2
5
2
2
2
5
2
2
2
2
5
5
2
2
2
5
5
2
2
2
5
5
2
2
2
5
5
3
2
2
2
5
5
3
2
2
2
5
5
3
2
2
2
5
5
3
2
2
2
2
5
5
3
2
One Sodium
Two Sodium
Let’s try again and add a 2 to the other side.
2
2
Does it balance this time?
This is a balanced equation.
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up.
__CH4
__CH4++__O2
__O2-->
-->__CO2
__CO2++__H2O
__H2O
C
H
O
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up. Try to balance…
__CH4
__CH4++__O2
__O2-->
-->__CO2
__CO2++__H2O
__H2O
C
H
O
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up. Try to balance…
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
H
O
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up. Try to balance… BOXES!
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
H
O
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up. Try to balance…
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
H
O
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up. Try to balance…
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
H
O
1
1
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up. Try to balance…
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
H
O
1
1
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up. Try to balance…
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
1
1
H
4
2
O
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up. Try to balance…
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
1
1
H
4
2
O
• It should work most of the time although it can be
very tricky. Always keep an inventory chart or it
will get all messed up. Try to balance…
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
1
1
H
4
2
O
2
3
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
1
1
H
4
2
O
2
3
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
1
1
H
4
2
O
2
3
What should
we put to
equal 4?
• See if this is right?
__CH4
+ __H
__H2O
__CH4 ++ __O2
__O2 -->
--> __CO2
__CO2 +
2O
C
1
1
H
4
2
O
2
3
• Answer: Incorrect – The inventory does not match.
__CH4
--> 2__CO2
1 CH4 +
+ __O2
2 O2 -->
CO2 ++2__H2O
H2O
C
1
2
H
4
4
O
4
5
• Answer: See if this is right?
__CH4
--> 1__CO2
1 CH4 +
+ __O2
2 O2 -->
CO2 ++2__H2O
H2O
C
H
O
• Answer: See if this is right?
__CH4
--> 1__CO2
1 CH4 +
+ __O2
2 O2 -->
CO2 ++2__H2O
H2O
C
H
O
• Answer: See if this is right?
• Answer: Yes, A balanced equation
__CH4
--> 1__CO2
1 CH4 +
+ __O2
2 O2 -->
CO2 ++2__H2O
H2O
C
1
1
H
4
4
O
4
4
• Try Again
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
Cl
Be
F
• Try Again
BOXES!!!
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
Cl
Be
F
• Try Again
BOXES!!!
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
Cl
Be
F
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
Cl
Be
F
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
Cl
Be
F
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
Cl
Be
F
1
1
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
Cl
Be
F
1
1
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
1
1
Cl
1
2
Be
F
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
1
1
Cl
1
2
Be
F
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
1
1
Cl
1
2
Be
1
1
F
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
1
1
Cl
1
2
Be
1
1
F
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
1
1
Cl
1
2
Be
1
1
F
2
1
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
1
1
Cl
1
2
Be
1
1
F
2
1
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
1
1
Cl
1
2
Be
1
1
F
2
1
__CH4
-->
__CO2
+ __H2O
___
NaCl++__O2
__ BeF
2 -->
__ NaF
+__ BeCl2
Na
Cl
Be
F
2 __CH4
NaCl ++1__O2
BeF2 -->
--> __CO2
2 NaF +
+ __H2O
1 BeCl2
Na
2
2
Cl
2
2
Be
1
1
F
2
2
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
Mn
O
F
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
Mn
O
F
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
Mn
O
F
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
Mn
O
F
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
Mn
O
F
1
1
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
Mn
O
F
1
1
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
1
1
Mn
2
1
O
F
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
1
1
Mn
2
1
O
F
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
1
1
Mn
2
O
3
1
1
F
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
1
1
Mn
2
O
3
1
1
F
__CH4
+ __O2
__Mg
+ __Mn
2O3-->
-->__CO2
__MgO++__H2O
__Mn
Mg
1
1
Mn
2
O
3
1
1
F
• Answer: See if this right?
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
1
1
Mn
2
O
3
1
1
F
• Answer: See if this right?
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
1
1
Mn
2
O
3
1
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
31
31
Mn
2
O
3
1
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
31
31
Mn
2
O
3
1
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
31
31
Mn
2
O
3
31
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
31
31
Mn
2
O
3
31
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
31
31
Mn
2
O
3
31
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
31
31
Mn
2
O
3
31
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
31
31
Mn
2
O
3
31
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
3 Mn
Mg
31
31
Mn
2
O
3
31
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
1 Mn
Mg
1
1
Mn
2
O
3
1
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
1 Mn
Mg
13
31
Mn
22
O
3
11
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
1 Mn
Mg
13
31
Mn
22
O
3
11
1
F
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
1 Mn
Mg
13
31
Mn
22
O
3
11
1
F
• Answer: See if this right?
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
2 Mn
Mg
1
1
Mn
2
O
3
1
1
F
• Answer: See if this right?
• This is a balanced equation.
+ Mn
__O2
3 __CH4
Mg + 1
2O3-->
-->__CO2
3 MgO++__H2O
2 Mn
Mg
1
3
Mn
2
31
21
O
33
31
F
Note – There are other methods to balance
equations without the use of tables and
inventory charts. The following links can
__CH4
+ other
__O2
-->
3show
Mg +you
1
Mn
2O3methods.
-->__CO2
3 MgO++__H2O
2 Mn
http://www.skyweb.net/science/balancing_chemical_equations.htm
http://chemistry.about.com/cs/stoichiometry/a/aa042903a.h
1
Mg
1
3
3
tm
21
Mn
2
http://www.fordhamprep.org/gcurran/sho/sho/lessons/lesso
n81.htm
O
F
33
31
• Okay, we now can understand it. Let’s
learn how to shorten this process a bit.
– http://www.youtube.com/watch?v=vO9VgitCx04
• Another way to balance chemical Equations.
• Video Link! Khan Academy - Balancing
Chemical Equations.
– http://www.youtube.com/watch?v=RnGu3xO2h74
• Online Quiz Link! Balancing Chemical
Equations.
• http://education.jlab.org/elementbalancing/
index.html
• Video Link! Khan Academy, Balancing
Chemical Equations.
• http://www.khanacademy.org/video/balanc
ing-chemicalequations?playlist=Chemistry
• Activity Simulator: Balancing Chemical
Equations.
– http://phet.colorado.edu/en/simulation/balanci
ng-chemical-equations
• Activity Sheet! Balancing Unbalanced
Chemical Equations. (New Problems)
– Do your best as this can be very difficult
for some.
– Use the Inventory Box Method or the one
learned from other sources.
• Activity! Making Elephant Toothpaste.
– Safety goggles and gloves are needed.
• Materials
– Empty 20 oz clear soda bottle.
– Hydrogen peroxide (3% from store or 8% from
cosmetic store)
– Active yeast
– Warm water
– Liquid dish soap
– Food coloring
– Spill tray.
•
Procedure:
–
–
–
–
–
–
Mix 120 ml of hydrogen peroxide with 60 ml of liquid
dish soap and a few drops of food coloring. Add this
mixture to the empty soda bottle and place it on the
spill tray.
In a separate container, mix one packet (1 teaspoon or
11 ml / 7 grams) of active yeast with a little warm water
(2 tablespoons / 30 ml) and let it sit for 5 minutes.
Remove clumps of yeast so you just add the liquid.
Pour the yeast mixture into the soda bottle with a funnel
and watch the reaction.
Feel the container for heat. (Exothermic)
All contents can be disposed of in the sink.
• Elephant Toothpaste
– The chemical formula for hydrogen peroxide
is H2O2.
– Hydrogen peroxide is not stable so it’s always
decomposing into water and oxygen.
– This occurs slowly under normal conditions.
– Yeast make the reaction go much faster and
the dishwashing soap creates the foam.
– The overall equation for this reaction is:
– 2 H2O2(aq) --> 2 H2O(l) + O2(g)
HEAT
• Elephant Toothpaste
– The chemical formula for hydrogen peroxide
is H2O2.
– Hydrogen peroxide is not stable so it’s always
decomposing into water and oxygen.
– This occurs slowly under normal conditions.
– Yeast make the reaction go much faster and
the dishwashing soap creates the foam.
– The overall equation for this reaction is:
– 2 H2O2(aq) --> 2 H2O(l) + O2(g)
HEAT
• Video Link! Exothermic Reaction
“Elephant Toothpaste”
– http://www.youtube.com/watch?v=4N0m95PE
xHY
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water.
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate
• Can you balance the equation for Alka-Seltzer
and water. Will this balance?
___ C6H8O7(aq) + ___NaHCO3(aq)
citric acid +
sodium bicarbonate
→ ___ H2O(l) + ___ CO2(g) + ___Na3C6H5O7(aq)
→
water + carbon dioxide + sodium citrate