2/4/2013 standards: 3 (stoichiometry) objectives: ● students will understand all coefficient mol...

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

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given

find

find

find

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grams --->

mol ---

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grams --->

mol ---

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gi

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fi

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ation

grams --->

mol ---

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Pgram

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P

gi

ve

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grams ---> mol ---> RP

grams ---> mol ---> RP

given

given

given

find

find

find

<--

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balancedequation

grams -

--> m

ol

---> R

P grams -

--> m

ol

---> R

P

gi

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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