12 16 Mole Review Part Ii
-
Upload
mrheffner -
Category
Technology
-
view
442 -
download
0
Transcript of 12 16 Mole Review Part Ii
Launch: 12/15 Grab your binder and immediately take a seat!
Place HW (Review Worksheet #1), binder paper, and a pen/pencil on your desk.
Review Objective #2:
Tonight’s HW: Finish Review Worksheet #2
Launch 12/15 4. Which of the following is a balanced equation for
the combustion of ethanol (C2H5OH)? a. C2H5OH + 3O2 CO2 + 2H2O b. C2H5OH + 3O2 2CO2 + 3H2O c. C2H5OH + O2 2CO2 + 3H2O
d. C2H5OH + 2O2 3CO2 + 2H2O
Launch 12/15 __C2H2 + __H2 __CH4
5. When the equation above is completely balanced, the coefficient for H2 would be
a. 1
b. 2
c. 3
d. 4
Launch 12/15 4. Which of the following is a balanced equation for
the combustion of ethanol (C2H5OH)? a. C2H5OH + 3O2 CO2 + 2H2O b. C2H5OH + 3O2 2CO2 + 3H2O c. C2H5OH + O2 2CO2 + 3H2O
d. C2H5OH + 2O2 3CO2 + 2H2O
Launch 12/15 __C2H2 + __H2 __CH4
5. When the equation above is completely balanced, the coefficient for H2 would be
a. 1
b. 2
c. 3
d. 4
Announcements Unit #5 Exam on Thursday
Last day to review One side of a 3 X 5 notecard
Make-up work is due today
Binder check on Friday lpschem.wordpress.com
Exam Information 30 multiple-choice questions
Balancing equations (6 questions = 20%) The mole (9 questions = 30%)
Conversions (15 questions = 50%) gram mole (6 questions)
gram atoms (3 questions)
gram gram (6 questions)
3 free response
Review: The Mole – Part II
Mr. Heffner 12/16/09
Conversions
Moles Grams Atoms
? grams 1 mole
1 mole ? grams
6.02 X 1023 atoms 1 mole
1 mole 6.02 X 1023 atoms
? moles ? moles
Conversions There is a 3-step process for conversions:
1. Write down the starting information and look at the ending information.
2. Using the “Heart of Chemistry”, pick the correct conversion factor(s).
3. Cancel like terms and do the math!
number “How many…”
Example #1 2H2 + O2 2H2O
In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?
Step #1: Write down the starting information and look at the ending information.
4.04g H2
2H2 + O2 2H2O
In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?
Step #2: Pick the correct conversion factor(s).
Example #1
4.04g H2 X
2H2 + O2 2H2O
In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?
Step #2: Pick the correct conversion factor(s).
Example #1
Moles Grams Atoms
? grams 1 mole
1 mole ? grams
6.02 X 1023 atoms 1 mole
1 mole 6.02 X 1023 atoms
? moles ? moles
Start
End
molar mass
2H2 + O2 2H2O
In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?
Step #2: Pick the correct conversion factor(s).
1 mol H2 2.02g H2
Example #1
4.04g H2 X X
Example #1
Moles Grams Atoms
? grams 1 mole
1 mole ? grams
6.02 X 1023 atoms 1 mole
1 mole 6.02 X 1023 atoms
? moles ? moles
Start
End
2H2 + O2 2H2O
In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?
Step #2: Pick the correct conversion factor(s).
mole ratio
2H2 + O2 2H2O
In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?
Step #2: Pick the correct conversion factor(s).
1 mol H2 2.02g H2
Example #1
4.04g H2 X mol O2 mol H2
X X1 2
Example #1
Moles Grams Atoms
? grams 1 mole
1 mole ? grams
6.02 X 1023 atoms 1 mole
1 mole 6.02 X 1023 atoms
? moles ? moles
Start
End
2H2 + O2 2H2O
In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?
Step #2: Pick the correct conversion factor(s).
molar mass
2H2 + O2 2H2O
In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?
Step #2: Pick the correct conversion factor(s).
1 mol H2 2.02g H2
Example #1
4.04g H2 X =1 mol O2 2 mol H2
X32.00g O2 1 mol O2
X
2H2 + O2 2H2O
In the equation above, how many grams of O2 are required to completely react with 4.04 grams of H2?
Step #3: Cancel like terms and do the math!
1 mol H2 2.02g H2
Example #1
4.04g H2 X =1 mol O2 2 mol H2
X32.00g O2 1 mol O2
X
=4 X 1 X 1 X 32 g O2 2 X 2 X 1
=4 X 32 g O2 4
~ 32 g O2 =
Example #2 2Na + 2H2O 2NaOH + H2
If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?
Step #1: Write down the starting information and look at the ending information.
54.06g H2O
2Na + 2H2O 2NaOH + H2
If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?
Step #2: Pick the correct conversion factor(s).
Example #2
54.06g H2O X
Example #2
Moles Grams Atoms
? grams 1 mole
1 mole ? grams
6.02 X 1023 atoms 1 mole
1 mole 6.02 X 1023 atoms
? moles ? moles
Start
End
molar mass
2Na + 2H2O 2NaOH + H2
If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?
Step #2: Pick the correct conversion factor(s).
2Na + 2H2O 2NaOH + H2
If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?
Step #2: Pick the correct conversion factor(s).
1 mol H2O 18.02g H2O
Example #2
54.06g H2O X X
Example #2
Moles Grams Atoms
? grams 1 mole
1 mole ? grams
6.02 X 1023 atoms 1 mole
1 mole 6.02 X 1023 atoms
? moles ? moles
Start
End
mole ratio
2Na + 2H2O 2NaOH + H2
If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?
Step #2: Pick the correct conversion factor(s).
2Na + 2H2O 2NaOH + H2
If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?
Step #2: Pick the correct conversion factor(s).
1 mol H2O 18.02g H2O
Example #2
54.06g H2O X mol H2 mol H2O
X X1
2
Example #2
Moles Grams Atoms
? grams 1 mole
1 mole ? grams
6.02 X 1023 atoms 1 mole
1 mole 6.02 X 1023 atoms
? moles ? moles
Start
End
molar mass
2Na + 2H2O 2NaOH + H2
If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?
Step #2: Pick the correct conversion factor(s).
2Na + 2H2O 2NaOH + H2
If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?
Step #2: Pick the correct conversion factor(s).
1 mol H2O 18.02g H2O
Example #2
54.06g H2O X =1 mol H2 2 mol H2O
X2.02g H2 1 mol H2
X
2Na + 2H2O 2NaOH + H2
If 54.06 grams of water (H2O) are mixed with excess sodium, then how many grams of hydrogen gas (H2) are produced?
Step #3: Cancel like terms and do the math!
1 mol H2O 18.02g H2O
Example #2
54.06g H2O X =1 mol H2 2 mol H2O
X2.02g H2 1 mol H2
X
=54 X 1 X 1 X 2g H2 18 X 2 X 1
=54 g H2 18
~ 3g H2 =
Whiteboards Work in pairs
Trade-off marker every question
Partner without the marker should be checking work at each step!
You have 60 seconds to solve the question Show all of your work! Don’t forget units!
Lift board only when prompted
How many grams of H2O would be produced from reacting 64.00g of O2?
2H2 + O2 2H2O
How many grams of O2 would be required to completely
react with 6.06g of H2?
2H2 + O2 2H2O
If 64.00 grams of O2 are reacted, how many grams of
water (H2O) are produced?
2H2 + O2 2H2O
If 1.01 grams of H2 are reacted, how many grams of
water (H2O) are produced?
2H2 + O2 2H2O
Exit Slip
1. Choose the correct conversion factor(s):
How many moles are there in 24.02 grams of carbon (C)?
I II III a. I only b. II only
c. III only d. I and II
1 mole 12.01g
12.01g 1 mole
6.02 X 1023 atoms 1 mole
Exit Slip
2. Choose the correct conversion factor(s):
How many atoms are there in 3 moles of CH4?
I II III a. I only
b. II only c. III only d. II and III
1 mole 16.05g
16.05g 1 mole
6.02 X 1023 atoms 1 mole
Exit Slip
3. Choose the correct conversion factor(s):
How many grams of CH4 are there in 9.03 X 1023 atoms?
I II III a. I only b. II only
c. II and III d. I and III
16.05g 1 mole
6.02 X 1023 atoms 1 mole
1 mole 6.02 X 1023 atoms
Exit Slip
4. Choose the correct conversion factor(s):
How many grams of H2O would be produced from 64.00 grams of O2?
I II III a. I only b. II only
c. II and III d. I, II, and III
2 mole H2O 1 mole O2
18.02 grams H2O 1 mole H2O
1 mole O2 32.00 grams O2
Exit Slip
a. 12g C X
b. 24g C X X
c. 24g C X X X
d. 24g C X X X
1 mol C 12.00g C 1 mol C
12.00g C 44.01g CO2 1 mol CO2
2 mol C 12.00g C
1 mol CO2 2 mol C
44.01g CO2 1 mol CO2
1 mol C 12.00g C
1 mol CO2 1 mol C
44.01g CO2 1 mol CO2
Homework Finish practice questions worksheet