Tuesday, Oct. 15 th : “A” Day Wednesday, Oct. 16 th : “B” Day Agenda

Tuesday, Oct. 15Tuesday, Oct. 15thth: “A” Day: “A” DayWednesday, Oct. 16Wednesday, Oct. 16thth: “B” Day: “B” Day

AgendaAgenda

Ch 9 review: Questions/problems?Ch 9 review: Questions/problems?

Jeopardy ReviewJeopardy Review

Homework: Vocabulary Crossword Puzzle

Next time:Next time:

Ch 9 test: “Stoichiometry” Ch 9 test: “Stoichiometry”

Concept review packets/puzzles dueConcept review packets/puzzles due

Ch 9 ReviewCh 9 Review

Questions/problems?Questions/problems?

Ch. 9 Short Answer Test Ch. 9 Short Answer Test QuestionsQuestions

The questions in the “critical The questions in the “critical thinking” category are 5 of the 6 thinking” category are 5 of the 6 short answer questions that will short answer questions that will be on the chapter test…be on the chapter test…

The 6The 6thth question is also in the question is also in the game, just not in this category…game, just not in this category…

StoichiometryStoichiometryCh.#9Ch.#9

THE RULES:

• You will be in five teams

•The winning team will receive mole money

• The host’s decisions are final

And now…here is the host of Jeopardy…

Mrs. Elfline

Let’s Get Ready to play…

Today’s Categories are:

VocabularyVocabulary

Moles/GramsMoles/GramsVolume/ParticlesVolume/Particles

Critical ThinkingCritical Thinking

Calculations!Calculations!

Movie QuotesMovie Quotes

$100

$200

$300

$400

$500

VocabularyVocabulary

$100

$200

$300

$400

$500

Moles/GramsMoles/GramsVolume/ParticlesVolume/Particles

$100

$200

$300

$400

$500

CriticalCriticalThinkingThinking

$100

$200

$300

$400

$500

Calculations!Calculations!

$100

$200

$300

$400

$500

MovieMovieQuotesQuotes

DDDD

FJFJ

The substance not completely The substance not completely used up in a chemical reactionused up in a chemical reaction

Answer…Answer…

Excess ReactantExcess Reactant

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The branch of chemistry that deals The branch of chemistry that deals with the relationship between with the relationship between reactants and products in a reactants and products in a

chemical reactionchemical reaction

Answer…Answer…

Stoichiometry Stoichiometry

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The substance that controls the The substance that controls the amount of product that can be amount of product that can be

mademade

Answer…Answer…

Limiting ReactantLimiting Reactant

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The The measured amount measured amount of product of product obtained from a chemical reactionobtained from a chemical reaction

Answer…Answer…

Actual YieldActual Yield

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The ratio of the actual yield to The ratio of the actual yield to theoretical yield X 100%theoretical yield X 100%

Answer…Answer…

Percentage YieldPercentage Yield

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Answer…Answer…

The ratio of Fe to FeThe ratio of Fe to Fe22OO33 in the in the reaction below isreaction below is

FeFe22OO33 + 2 Al 2 Fe + Al + 2 Al 2 Fe + Al22OO33

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2 : 12 : 1

(2 to 1)(2 to 1)

Answer…Answer…

To convert from moles of what To convert from moles of what you’re given to moles of what you you’re given to moles of what you want, what do you need to use?want, what do you need to use?

Mole RatioMole Ratio(aka secret magic step)(aka secret magic step)

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How is density used in How is density used in stoichiometry problems?stoichiometry problems?

Answer…Answer…

Use the density of the substance Use the density of the substance to convert mL or liters of what to convert mL or liters of what

you’re given to grams and then to you’re given to grams and then to moles. Then you can use the moles. Then you can use the

mole ratio to convert to moles of mole ratio to convert to moles of what you want to find.what you want to find.

300300

What number do you need to What number do you need to convert to number of convert to number of

atoms/molecules/particles?atoms/molecules/particles?

Answer…Answer…

6.022 X 106.022 X 102323 particles/mole particles/mole(Avogadro’s number)(Avogadro’s number)

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WhyWhy must a chemical equation be must a chemical equation be balanced to solve stoichiometry balanced to solve stoichiometry

problems?problems?

Answer…Answer…

The coefficients in a balanced The coefficients in a balanced chemical equation show the chemical equation show the

relative number of moles of each relative number of moles of each substance. Mole ratios can then substance. Mole ratios can then

be found and used to convert from be found and used to convert from moles of one substance to moles moles of one substance to moles

of another.of another.

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WhyWhy must a chemical equation be must a chemical equation be balanced to solve stoichiometry balanced to solve stoichiometry

problems?problems?

Answer…Answer…

The coefficients from a balanced The coefficients from a balanced chemical equation represent the chemical equation represent the relative number of moles and are relative number of moles and are used in the mole ratio conversion used in the mole ratio conversion

step.step.

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ExplainExplain the difference between a the difference between a limiting reactant and an excess limiting reactant and an excess

reactant.reactant.

Answer…Answer…

The limiting reactant controls the The limiting reactant controls the amount of product that can be amount of product that can be

made and will be used up in the made and will be used up in the reaction.reaction.

The excess reactant will be left The excess reactant will be left over after the reaction.over after the reaction.

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HowHow does the actual yield of a does the actual yield of a chemical reaction compare to the chemical reaction compare to the

theoretical yield? theoretical yield?

Answer…Answer…

The actual yield is LESS than the The actual yield is LESS than the theoretical yield.theoretical yield.

300300

ExplainExplain why the conversion factor why the conversion factor 3 g Mg(OH)3 g Mg(OH)22 cannot be used cannot be used

6 g H 6 g H22OO

for the following reaction:for the following reaction:

MgMg33NN22 + 6 H + 6 H22O 3 Mg(OH)O 3 Mg(OH)22 + 2 NH + 2 NH33

Answer…Answer…

The coefficients from the balanced The coefficients from the balanced equation represent number of equation represent number of

moles of reactants and products – moles of reactants and products – NOT grams.NOT grams.

400400

In the “Stoichiometry and In the “Stoichiometry and Gravimetric Analysis” lab, you Gravimetric Analysis” lab, you prepared strontium carbonate, prepared strontium carbonate,

SrCOSrCO33, according to the following , according to the following equation:equation:

SrClSrCl22 + Na + Na22COCO33 2 NaCl + SrCO 2 NaCl + SrCO33

a) What type of reaction was this?a) What type of reaction was this?b) Why was the SrCOb) Why was the SrCO33 rinsed in the rinsed in the

funnel after filtering?funnel after filtering?Answer…Answer…

a) Double displacementa) Double displacement

b) The SrCOb) The SrCO33 was rinsed in the was rinsed in the funnel to remove any NaCl that funnel to remove any NaCl that

may have been present.may have been present.

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How many moles of hydrogen are How many moles of hydrogen are needed to prepare 312 moles of needed to prepare 312 moles of

ammonia?ammonia?

NN22 + 3 H + 3 H22 2 NH 2 NH33

Answer…Answer…

468 mol H468 mol H22

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How many grams of Al are needed How many grams of Al are needed to completely react with 135 g to completely react with 135 g

of Feof Fe22OO33??

FeFe22OO33 + 2 Al 2 Fe + Al + 2 Al 2 Fe + Al22OO33

Answer…Answer…

45.6 g Al45.6 g Al

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How many mL of CHow many mL of C55HH88 can be can be made from 366 mL of Cmade from 366 mL of C55HH1212??

(Density of C(Density of C55HH8 8 = 0.681 g/mL)= 0.681 g/mL)(Density of C(Density of C55HH12 12 = 0.620 g/mL)= 0.620 g/mL)

CC55HH1212 C C55HH88 + 2 H + 2 H22

Answer…Answer…

315 mL C315 mL C55HH88

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How many grams of CHow many grams of C55HH88 form form from 1.89 X 10from 1.89 X 102424 molecules C molecules C55HH1212??

CC55HH1212 C C55HH88 + 2 H + 2 H22

Answer…Answer…

214 g C214 g C55HH88

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Find the limiting reactant, the Find the limiting reactant, the theoretical yield, and the theoretical yield, and the

percentage yield if 14.0 g Npercentage yield if 14.0 g N22 are are mixed with 9.0 g Hmixed with 9.0 g H22 and 16.1 g and 16.1 g

NHNH33 form. form.

NN22 + 3 H + 3 H22 2 NH 2 NH33

Answer…Answer…

NN22 is limiting reactant is limiting reactantTheoretical yield = 17.0 g NHTheoretical yield = 17.0 g NH33

Percentage yield = 94.7%Percentage yield = 94.7%

500500

Answer…Answer…

Listen… Listen…

What movie is this quote from?What movie is this quote from?

““The Wizard of Oz”The Wizard of Oz”

“I’ll get you my pretty, and your “I’ll get you my pretty, and your little dog too!”little dog too!”

(The wicked witch of the west (The wicked witch of the west talking to Dorothy)talking to Dorothy)

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Listen… Listen…

What movie is this quote from?What movie is this quote from?

Answer…Answer…

““Toy Story”Toy Story”

“reach for the sky” “reach for the sky”

(What Woody says when his string (What Woody says when his string is pulled)is pulled)

200200

Listen… Listen…

What movie is this quote from?What movie is this quote from?

Answer…Answer…

““Dodgeball”Dodgeball”

“Nobody makes me bleed my own “Nobody makes me bleed my own blood…nobody!”blood…nobody!”

(What White Goodman, played by (What White Goodman, played by Ben Stiller, says after Taylor Ben Stiller, says after Taylor

makes him bleed.)makes him bleed.) 300300

Listen… Listen…

What movie is this quote from?What movie is this quote from?

Answer…Answer…

“ “Shrek”Shrek”

“I’m not a puppet, I’m a real boy!”“I’m not a puppet, I’m a real boy!”

(Pinocchio trying to convince himself (Pinocchio trying to convince himself that he’s a real boy)that he’s a real boy) 400400

Listen… Listen…

What movie is this quote from?What movie is this quote from?

Answer…Answer…

““Jaws”Jaws”

“You’re gonna need a bigger boat “You’re gonna need a bigger boat right?”right?”

(What sheriff Martin Brody says (What sheriff Martin Brody says after he sees the size of the shark after he sees the size of the shark

that’s terrorizing the citizens of that’s terrorizing the citizens of Amity)Amity) 500500

Daily DoubleDaily DoubleHow much do you want

to wager?

Daily DoubleDaily Double

FINALFINALJEOPARDYJEOPARDY

CATEGORY:CATEGORY:Theoretical Theoretical

YieldYieldHow much do you want

to wager?Proceed…Proceed…

Identify the limiting reactant and theoretical yield of H3PO3 if 225 g of PCl3 is mixed with

123 g of H2O.

PCl3 + 3H2O H3PO3 +3HCl

Proceed…Proceed…

Limiting Reactant = Limiting Reactant = PClPCl33

Theoretical Yield = Theoretical Yield = 134 g H134 g H33POPO33

Proceed…Proceed…

Thanks for Thanks for PLAYING!PLAYING!

Credits

Created by:

Chad Kafka, Business Teacher Huntley High School

chad@kafkaproductions.com

Jeopardy sound effects used solely for the purpose of fun, entertainment, and education and NOT for profit.