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2/4/2013 Standards: 3 (Stoichiometry)Objectives:● Students will understand all coefficient mol ratios in balanced eqns.DO NOW: 1. Start your homework.HOMEWORK: 1. Ch 12.1, PP's, p357 2 (a-c), 3 (a, b), Assess 4-6, 7 (a-c), 8 (5 pts) Std 3========================================================== BASKET (Stamped): Journal 2/1 (mass vs mol relationships) 1. Ch 12.1, p. 356 PP's 1 (a-e). (3 pts) Std 3 2. Watch my video on apples and oranges, and take notes on everything
you see on screen, and give a summary or what you learned from video. (vid on YouTube) (2 pts) Std 3
The next slide is a review of our last lesson.
___Fe + ___O2 -----> ___Fe2O3
Mole ratioes of coefficients for balanced chemical equations
mol ratio ___ : ___ : ___
particle ratio ___ : ___ : ___
gram ratio ___ : ___ : ___
grams left ___ g grams right ___ g
calc molar masses
Conservation of mass works?
The next few slides, model how to do your homework for questions on p. 357 2 (a-c) and 3 (a-b), and #7 (a-c).
Show the balanced equation with all arrows shown and numbered. Then show all mole ratios as demonstrated and numbered.
___Fe + ___O2 -----> ___Fe2O3
All possible mole ratios of coefficients
mol Fe mol O2 mol O2 mol Fe2O3
mol O2 mol Fe mol Fe2O3 mol O2
___Fe + ___Al2O3 -----> ___Al + ___Fe2O3
mol Fe
mol Al
mol Al
mol Fe
mol Fe
mol Al2O3
mol Al2O3
mol Fe
mol Femol Fe2O3
mol Fe2O3
mol Fe
mol Al2O3
mol Al
mol Al
mol Al2O3
mol Al
mol Fe2O3
mol Fe2O3 mol Al
mol Al2O3
mol Fe2O3
mol Fe2O3 mol Al2O3
1
2
3
4
5
6
7
8
9
10
11
12
All possible mole ratios of coefficients
This slide gives you the skeleton equations for each of the reactions given in words equations. These need to be balanced, arrows & their numbers drawn, and mole ratios show as you did in problems 2 & 3.
2/5/2013 Standards: 3 (Stoichiometry)Objectives:● Students will understand stoichiometry to get from mol of one kind of
particle to mol of another kind of particle. DO NOW: 1. Ch 12.2, p. 359 PP 9 Work out showing balance equation & calc.
Answers: 12.5 mol H2SO4 and 6.25 mol O2 (show how to get these ans)HOMEWORK: 1. Ch 12.2 PP's, p. 359 9, 10 and p. 360 11, 12 (5 pts) Std 3========================================================== BASKET (Stamped): Journal 2/4 (mass vs mol relationships, and mole
ratios of coefficients in balanced equations) 1. Ch 12.1, PP's, p357 2 (a-c), 3 (a, b), Assess 4-6, 7 (a-c), 8 (5 pts) Std 3
12 problems total
The following problem models HW problems 9 & 10 on p. 359
Example of how to do DO NOW (which is first problem in HW)
Given Find
___SO2 + ___O2 + ___H2O -----> ___H2SO4
8.5 mol O2 1. ? mol H2SO4 can be made?2. ? mol SO2 will be needed?
Read prob p. 359 to get reactants & products from word equation
The following problem models HW problems 11 & 12 on p. 360
___HCl + ___Zn -----> ___H2 + ___ZnCl2
Given Find
4.4 mol Zn ? grams of H2 can be produced?
Hydrochloric Acid and zinc metal produce hydrogen gas and ZnCl2
Figure what are reactancts & product from word eqn:
2/6/2013 Standards: 3 (Stoichiometry)Objectives:● Students will be able to work Percent Yield problemsDO NOW: 1. For the following HW problems, just write skeleton & balanced equations, given & find for: p. 372 #28 & 29 (finish them at home)HOMEWORK: 1. Ch 12.2, Assess. p. 363 15-17, Ch 12.4, p. 372 PP's 27-29 (5 pts) Std 3============================================================= BASKET (Stamped): Journal 2/5 1. Ch 12.2 PP's, p. 359 9, 10 and p. 360 11, 12 (5 pts) Std 3
PercentYield
What are these?
grams ---> mol ---> RP
grams ---> mol ---> RP
given
given
given
find
find
find
<--
-->bala
ncedequation
grams --->
mol ---
> RP
grams --->
mol ---
> RP
gi
ve
ng
iv
en
gi
ve
n
fi
nd
fi
nd f
in
d
<--- ->balance
dequ
ation
grams --->
mol ---
> R
Pgram
s ---> m
ol ---
> R
P
gi
ve
n
gi
ve
n gi
ve
n
fi
nd
fi
nd f
in
d
<---->bal
anced
equatio
n
grams ---> mol ---> RP
grams ---> mol ---> RP
given
given
given
find
find
find
<--
-->
balancedequation
grams -
--> m
ol
---> R
P grams -
--> m
ol
---> R
P
gi
ve
ng
iv
en
gi
ve
n
fi
ndf
in
d
fi
nd
<---
->bal anc edequ atio
n
grams ---> mol ---> RPgrams ---> mol ---> RP
given
given
given
find
find
find
<---->
balancedequation
grams ---> mol ---> RP
grams ---> mol ---> RP
given givengiven
find findfind
<---->
balancedequation
Theoretical yield
x xx x7.7 g Fe
1
1 mol
molar mass molar
mass
mol ratio
=
The calculated amount of a product
The given amount of a product in a % yield problem.
Actual yield
Theoretical yield
Actual yield
Theoretical yield (calculated)
Actual yield (must be given)
x100
= % Yield
Theoretical yield (calculated)
Actual yield (must be given)
x 100 = % Yield
Theoretical yield (calculated)
Actual yield (must be given)
x100
=% Yield
p. 372
#28
#29
BalancedEquation
Given Find
Given Find
BalancedEquation
MORE EXAMPLES
6.02 x 1023
1 mol
given findx
(given) ---> mol (given) ---> mol (find) ---> (find)
Given:11.7 g Na
Find:? g H2O wil be used?
1 mol
x
6.02 x 1023
Balanced Equation
x xx x
molar mass
molar mass
(Theo)
molar mass
mol ratio
mol ratio molar mass
=
__Na + __H2O ----> __NaOH + __H2
molar mass mol ratio
molar mass
=1 mol
1 mol
x
Bal eqn
See links on HW page tonight for SODIUM REACTION
2/7/2013 Standards: 3 (Stoichiometry)Objectives:● Students will be able to work Percent Yield problems● Start Review for Ch 12.1, 12.2, 12.4 Quiz● Demo steel wool combustion, and __Fe + __HCl -----> __H2 + __FeCl2
DO NOW: 1. Complete % Yield problems from last night's assignmentHOMEWORK: 1. Ch 12 Assess, p. 378-379 51, 54, 61, 66. SHOW CALCS. (2 pts) Std 3 2. Standardized Test Pract p. 383 1-6 (copy q's, give complete reasons
and complete answers) 3 pts (Std 3)============================================================= BASKET (Stamped): Journal 2/6 1. Ch 12.2, Assess. p. 363 15-17, Ch 12.4, p. 372 PP's 27-29 (5 pts) Std 3
HW Explanation for Standardized Test Practice
I've learned:
That being kind is more important than being right
Standardized Test Practice - page 383 # 2
___Na2CO3 + ___Ca(OH)2 ----> ___NaOH + ___CaCO3
Given (see chart) 500.0 g Na2CO3 300.0 g Ca(OH)2
Find Possible moles of NaOH
Start by converting:
500.0 g Na2CO3 ---> mol Na2CO3 300.0 g Ca(OH)2 ---> mol Ca(OH)2
p. 378 # 54
p. 379 #66
___C8H18 + ___O2 -----> ___CO2 + ___H2O
p. 379 66 (tonight's HW)
Given Find
?
2/8/2013 Standards: 3 (Stoichiometry)Objectives:● Students will be able to perform well on Quiz 3.2 (Ch 11 and 12)DO NOW: 1. Mem Ions 4 (40 pts) 1. Do as much of the homework as you can before bell rings. 2. If you OWE ME SENTENCES, have them complete before end of day
to avoid a "U" on your 5 week grade report.HOMEWORK: 1. Ch 11.3, 11.5, and Ch 12.1, 12.2, and 12.4 - Quiz 3.2 Practice Test
Evens only from both sides. (5 pts) Std 3============================================================= BASKET (Stamped): Journal 2/7 1. Ch 12 Assess, p. 378-379 51, 54, 61, 66. SHOW CALCS. (2 pts) Std 3 2. Standardized Test Pract p. 383 1-6 (copy q's, give complete reasons
and complete answers) 3 pts (Std 3)
DIRECTIONS:
● Use a separate sheet of paper. ● Questions with calculations, given and find, show
calculations and circle your answer. ● Questions that don’t require calculations, copy entire
question, write answer (not just letter), and reason withpage #, OR give VERY COMPLETE sentence for answer
that makes the question obvious & page #. (10 pts) Std 3
