Let’s Play Hangman What’s the Word? Based on the law of conservation of mass, a balanced...

Let’s Play HangmanLet’s Play Hangman

What’s the Word?What’s the Word?

• Based on the law ofBased on the law ofconservation of mass, a balanced conservation of mass, a balanced chemical reaction allows you to chemical reaction allows you to calculate back and forth, between calculate back and forth, between the mass and moles of reactants the mass and moles of reactants and products.and products.

S T O I C H I O M E T R YS T O I C H I O M E T R Y

Copyright 2011 CreativeChemistryLessons.com

Law of Multiple Proportions Law of Multiple Proportions

• John Dalton originated theJohn Dalton originated theidea that when elements idea that when elements combine, they do so in combine, they do so in whole whole number ratiosnumber ratios..

• John Dalton originated theJohn Dalton originated theidea that when elements idea that when elements combine, they do so in combine, they do so in whole whole number ratiosnumber ratios..1N2 + 3H2 2NH3 1N2 + 3H2 2NH3

N N HH

HNH HH HH H H

HHN


Law of Multiple ProportionsAtoms combine in whole number ratios

_B + _M + _Ch _B2M3Ch 2 3 1 1


Law of Multiple ProportionsAtoms Combine in Whole Number Ratios

_F + _W + _H + _P2 _FW2HP2 1 2 1 11


Law of Conservation of MassLaw of Conservation of Mass

• Matter cannot be created or destroyed Matter cannot be created or destroyed in any reaction, only rearranged, so in any reaction, only rearranged, so the number of reactant atoms the number of reactant atoms MUST MUST EQUAL EQUAL the number of product atoms.the number of product atoms.

• Matter cannot be created or destroyed Matter cannot be created or destroyed in any reaction, only rearranged, so in any reaction, only rearranged, so the number of reactant atoms the number of reactant atoms MUST MUST EQUAL EQUAL the number of product atoms.the number of product atoms.

1N2 + 3H2 2NH3 1N2 + 3H2 2NH3

N

H


Magnesium Lab ResultsMagnesium Lab Results

• Magnesium reacts with Oxygen to Magnesium reacts with Oxygen to produce Magnesium Oxide.produce Magnesium Oxide.

• Magnesium reacts with Oxygen to Magnesium reacts with Oxygen to produce Magnesium Oxide.produce Magnesium Oxide.

_Mg_Mg

Mg

O

_O2_O2 _MgO _MgO 22 11 22MgO MgO MgMg

PLAY LAB VIDEO


Magnesium Lab ResultsMagnesium Lab Results

• What happened to the mass of the What happened to the mass of the Magnesium after burning it?Magnesium after burning it?

• The mass increased.The mass increased.• How can the Magnesium get How can the Magnesium get

heavier after it is burned?heavier after it is burned?• Magnesium combined with Magnesium combined with

Oxygen to form a heavier Oxygen to form a heavier compound, Magnesium Oxide.compound, Magnesium Oxide.

• What happened to the mass of the What happened to the mass of the Magnesium after burning it?Magnesium after burning it?

• The mass increased.The mass increased.• How can the Magnesium get How can the Magnesium get

heavier after it is burned?heavier after it is burned?• Magnesium combined with Magnesium combined with

Oxygen to form a heavier Oxygen to form a heavier compound, Magnesium Oxide.compound, Magnesium Oxide.

LESSON SUMMARYLESSON SUMMARY

Identify the Main Topic. Use my analogies.Identify the Main Topic. Use my analogies.The topic we learned in chemistry today The topic we learned in chemistry today was __________, which is a lot like…was __________, which is a lot like…

Give an example of the topic.Give an example of the topic.For instance, _____ is a good example of For instance, _____ is a good example of the topicthe topic because… because…

Explain additional details of your example.Explain additional details of your example.Furthermore, Furthermore, exampleexample shows shows the topicthe topic because it portrays…because it portrays…


STOI-CANYONSTOI-CANYON



GRAMSGRAMSREACTANT 1REACTANT 1




GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


MOLEBRIDGE

MOLEBRIDGE

MOLEBRIDGE

MOLEBRIDGE



MOLERATIOMOLERATIO



MOLERATIOMOLERATIO





GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1

++ 2O22O2 1CO2 1CO2 1CH41CH4 2H2O2H2O++



MOLE---------RATIO

GRAMSGRAMSREACTANTREACTANT

22

GRAMSGRAMSREACTANTREACTANT

11

GRAMSPRODUCT

2

GRAMSPRODUCT

1

1. When 12 grams of Magnesium reacts with Oxygen, how many grams of Magnesium Oxide is produced?

1. When 12 grams of Magnesium reacts with Oxygen, how many grams of Magnesium Oxide is produced?

QUESTION #1QUESTION #1

2Mg + 1O2 2MgO 2Mg + 1O2 2MgO

SYNTHESIS REACTIONSYNTHESIS REACTION


GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSREACTANT 2

GRAMSREACTANT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1

++ 1O21O2 2MgO 2MgO 2Mg2Mg

1. When 1. When 12 grams of 12 grams of MagnesiumMagnesium reacts with reacts with

Oxygen, Oxygen, how manyhow many grams grams of Magnesium Oxideof Magnesium Oxide is is

produced?produced?

2MgO-------2Mg

2MgO-------2Mg

1. When 1. When 12 grams of Magnesium12 grams of Magnesium reacts with Oxygen, reacts with Oxygen, how how many grams of Magnesium Oxidemany grams of Magnesium Oxide is produced? is produced?

Stoi-Canyon Use Mole Bridge to Find Moles

Use Mole Ratio Use Mole Bridge to Find Grams

12g12g ????

24g/mol24g/mol

÷2Mg2MgO

12 grams Mg 20 grams MgO

?? 0.50.5molmol0.50.5molmol

40g/mol40g/mol

x

2MgO2Mg

= 0.5 moles Mg

= 0.5 moles MgO = 20 grams MgO


2Mg + 1O2 2MgO

Known

12g Mg

1

Molar Mass

1mol

24g

Mole Ratio

2MgO

2Mg

Molar Mass

40g

1mol

Answer

= 20g MgO

1. When 1. When 12 grams of Magnesium12 grams of Magnesium reacts with Oxygen, reacts with Oxygen, how how many grams of Magnesium Oxidemany grams of Magnesium Oxide is produced? is produced?

2. How much Oxygen is needed to produce 20 grams of Magnesium Oxide?

2. How much Oxygen is needed to produce 20 grams of Magnesium Oxide?





GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSREACTANT 2

GRAMSREACTANT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


2. 2. How much OxygenHow much Oxygen is needed to produce is needed to produce

20 grams of 20 grams of Magnesium OxideMagnesium Oxide??

1O2-------2MgO

1O2-------2MgO

2. 2. How much OxygenHow much Oxygen is needed to produce is needed to produce 20 grams of 20 grams of Magnesium OxideMagnesium Oxide??



20g20g ????

40g/mol40g/mol

÷2MgO1O2

20 grams MgO 8 grams O2

?? 0.250.25molmol0.250.25molmol

32g/mol32g/mol

x

21O2MgO

= 0.5 moles MgO

= 0.25 moles O2 = 8 grams O2

2Mg + 1O2 2MgO

Known

20g MgO

1

Molar Mass

1mol

40g

Mole Ratio

1O2

2MgO

Molar Mass

32g

1mol

Answer

= 8g O2

2. 2. How much OxygenHow much Oxygen is needed to produce is needed to produce 20 grams of 20 grams of Magnesium OxideMagnesium Oxide??

3. How much Magnesium is needed to completely react with 8 grams of Oxygen to produce Magnesium Oxide?

3. How much Magnesium is needed to completely react with 8 grams of Oxygen to produce Magnesium Oxide?




GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSREACTANT 2

GRAMSREACTANT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


3. 3. How much How much MagnesiumMagnesium is needed is needed

to completely react to completely react with with 8 grams of 8 grams of

OxygenOxygen??

2Mg-------1O2

2Mg-------1O2

3. 3. How much MagnesiumHow much Magnesium is needed to completely react with is needed to completely react with 8 grams of Oxygen8 grams of Oxygen to produce Magnesium Oxide? to produce Magnesium Oxide?



8g8g ????

32g/mol32g/mol

÷1O22Mg

8 grams O2 12 grams Mg


24g/mol24g/mol

x2

2Mg1O

= 0.25 moles O2

= 0.5 moles Mg = 12g Mg

2Mg + 1O2 2MgO

Known

8g O2

1

Molar Mass

1mol

32g

Mole Ratio

2Mg

1O2

Molar Mass

24g

1mol

Answer

= 12g Mg

3. 3. How much MagnesiumHow much Magnesium is needed to completely react with is needed to completely react with 8 grams of Oxygen8 grams of Oxygen to produce Magnesium Oxide? to produce Magnesium Oxide?

4. When 84 grams of Nitrogen reacts with Hydrogen, how many grams of ammonia is produced?

4. When 84 grams of Nitrogen reacts with Hydrogen, how many grams of ammonia is produced?


1N2 + 3H2 2NH3 1N2 + 3H2 2NH3



GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSREACTANT 2

GRAMSREACTANT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1

++ 3H23H2 2NH3 2NH3 1N21N2

4. When 4. When 84 grams of 84 grams of NitrogenNitrogen reacts with reacts with Hydrogen, Hydrogen, how manyhow many grams of ammoniagrams of ammonia is is

produced?produced?

2NH3-------1N2

2NH3-------1N2

4. When 4. When 84 grams of Nitrogen84 grams of Nitrogen reacts with Hydrogen, reacts with Hydrogen, how how many grams of ammoniamany grams of ammonia is produced? is produced?Stoi-Canyon Use Mole Bridge to Find Moles


84g84g ????

28g/mol28g/mol

÷1N22NH3

84 grams N2 102 grams NH3

?? 6mol6mol6mol6mol

17g/mol17g/mol

x

3

2

2NH1N

= 3 moles N2

= 6 moles NH3 = 102 grams NH3

1N2 + 3H2 2NH3

Known

84g N2

1

4. When 4. When 84 grams of Nitrogen84 grams of Nitrogen reacts with Hydrogen, reacts with Hydrogen, how how many grams of ammoniamany grams of ammonia is produced? is produced?

Molar Mass

1mol

28g

Mole Ratio

2NH3

1N2

Molar Mass

17g

1mol

Answer

= 102g NH3





5. How many grams of Methanol are produced when 56 grams of Carbon Monoxide reacts with Hydrogen?

5. How many grams of Methanol are produced when 56 grams of Carbon Monoxide reacts with Hydrogen?


1CO + 2H2 1CH3OH 1CO + 2H2 1CH3OH


GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSREACTANT 2

GRAMSREACTANT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1

++ 2H22H2 1CH3OH1CH3OH1CO1CO

5. 5. How many grams of How many grams of MethanolMethanol are produced are produced

when when 56 grams of 56 grams of Carbon MonoxideCarbon Monoxide

reacts with Hydrogen?reacts with Hydrogen?

1CH3OH---------1CO

1CH3OH---------1CO

5. 5. How many grams of MethanolHow many grams of Methanol are produced when are produced when 56 56 grams of Carbon Monoxidegrams of Carbon Monoxide reacts with Hydrogen? reacts with Hydrogen?



56g56g ????

28g/mol28g/mol

÷1CO1CH3OH

56 grams CO 64 grams CH3OH

?? 22molmol

22molmol

32g/mol32g/mol

x3CH O1 H

1CO

= 2 moles CO

= 2 moles CH3OH = 64 grams CH3OH

1CO + 2H2 1CH3OHKnown

56g CO

1

5. 5. How many grams of MethanolHow many grams of Methanol are produced when are produced when 56 56 grams of Carbon Monoxidegrams of Carbon Monoxide reacts with Hydrogen? reacts with Hydrogen?

Molar Mass

1mol

28g

Mole Ratio

1CH3OH

1CO

Molar Mass

32g

1mol

Answer

= 64g CH3OH


1Na2O + 1H2O 2NaOH 1Na2O + 1H2O 2NaOH


GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSREACTANT 2

GRAMSREACTANT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1

++ 1H2O1H2O 2NaOH2NaOH1Na2O1Na2O

6. 6. How many grams of How many grams of Sodium HydroxideSodium Hydroxide is is produced when you produced when you

react react 93 grams of 93 grams of Sodium OxideSodium Oxide with with

excess Water?excess Water?

2NaOH---------1Na2O

2NaOH---------1Na2O

6. 6. How many grams of Sodium HydroxideHow many grams of Sodium Hydroxide is produced when is produced when you react you react 93 grams of Sodium Oxide93 grams of Sodium Oxide with excess Water? with excess Water?



93g93g ????

62g/mol62g/mol

÷1Na2O2NaOH

93 grams Na2O 120 grams NaOH

?? 33molmol

33molmol

40g/mol40g/mol

x2

21NaOHNa O

= 1.5 moles Na2O

= 3 moles NaOH = 120 grams NaOH

1Na2O + 1H2O 2NaOHKnown

93g Na2O

1

6. 6. How many grams of Sodium HydroxideHow many grams of Sodium Hydroxide is produced when is produced when you react you react 60 grams of Sodium Oxide60 grams of Sodium Oxide with excess Water? with excess Water?

Molar Mass

1mol

62g

Mole Ratio

2NaOH

1Na2O

Molar Mass

40g

1mol

Answer

= 120g NaOH

7. How many grams of Calcium Carbonate are needed to make 14 grams of Calcium Oxide?

7. How many grams of Calcium Carbonate are needed to make 14 grams of Calcium Oxide?


1CaCO3 1CaO + 1CO2 1CaCO3 1CaO + 1CO2

DECOMPOSITION REACTIONDECOMPOSITION REACTION

GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1

++1CaO1CaO 1CO21CO21CaCO31CaCO3

7. 7. How many grams of Calcium Carbonate are needed to make 14 grams of Calcium Oxide?

1CaCO3---------1CaO

1CaCO3---------1CaO

7. 7. How many grams of Calcium CarbonateHow many grams of Calcium Carbonate are needed to are needed to make make 14 grams of Calcium Oxide14 grams of Calcium Oxide??



14g14g ????

56g/mol56g/mol

÷1CaO1CaCO3

14 grams CaO 25 grams CaCO3

?? 0.250.25molmol0.250.25molmol

100g/mol100g/mol

x31CaCO

1CaO

= 0.25 moles CaO

= 0.25 moles CaCO3 = 25 grams CaCO3

Known

14g CaO

1

7. 7. How many grams of Calcium CarbonateHow many grams of Calcium Carbonate are needed to are needed to make make 14 grams of Calcium Oxide14 grams of Calcium Oxide??

Molar Mass

1mol

56g

Mole Ratio

1CaCO3

1CaO

Molar Mass

100g

1mol

Answer

= 25g CaCO3

1CaCO3 1CaO + 1CO2

8. How many grams of Oxygen are produced from the decomposition of 105 grams of Beryllium Sulfate?



1BeSO4 1BeS + 2O2 1BeSO4 1BeS + 2O2


GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1

++1BeS1BeS 2O22O21BeSO41BeSO4


2O2---------1BeSO4

2O2---------1BeSO4

8. 8. How many grams of OxygenHow many grams of Oxygen are produced from the are produced from the decomposition of decomposition of 105 grams of Beryllium Sulfate105 grams of Beryllium Sulfate??



105g105g ????

105g/mol105g/mol

÷1BeSO42O2

105 grams BeSO4 64 grams O2

?? 22molmol

22molmol

32g/mol32g/mol

x

2

4

OB2eSO1

= 1 mole BeSO4

= 2 moles O2 = 64 grams O2

Known

105g BeSO4

1

8. 8. How many grams of OxygenHow many grams of Oxygen are produced from the are produced from the decomposition of decomposition of 105 grams of Beryllium Sulfate105 grams of Beryllium Sulfate??

Molar Mass

1mol

105g

Mole Ratio

2O2

1BeSO4

Molar Mass

32g

1mol

Answer

= 64g O2

1BeSO4 1BeS + 2O2





9. How much Chlorine gas is produced by decomposing 36 grams of Calcium Chloride?



1CaCl2 1Ca + 1Cl2 1CaCl2 1Ca + 1Cl2


AVOGADRO STYLEAVOGADRO STYLE

GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1

++1Ca1Ca 1Cl21Cl21CaCl21CaCl2


1Cl2---------1CaCl2

1Cl2---------1CaCl2

9. How much Chlorine gas is produced by decomposing9. How much Chlorine gas is produced by decomposing36 grams of Calcium Chloride? 36 grams of Calcium Chloride?



36g36g ????

110g/mol110g/mol

÷1CaCl21Cl2

36 grams CaCl2 21 grams Cl2


70g/mol70g/mol

x

2

2

ClC1aCl1

= 0.3 moles CaCl2

= 0.3 moles Cl2 = 21 grams O2

Known

36g CaCl2

1

9. How much Chlorine gas is produced by decomposing9. How much Chlorine gas is produced by decomposing36 grams of Calcium Chloride? 36 grams of Calcium Chloride?

Molar Mass

1mol

110g

Mole Ratio

1Cl2

1CaCl2

Molar Mass

70g

1mol

Answer

= 21g Cl2

1CaCl2 1Ca + 1Cl2

10. When 680 grams of Silver Nitrate reacts with Magnesium, how many grams of Silver are produced?



1Mg + 2AgNO3 1Mg(NO3)2 + 1Ag 1Mg + 2AgNO3 1Mg(NO3)2 + 1Ag

SINGLE REPLACEMENT REACTIONSINGLE REPLACEMENT REACTION

GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


1Ag---------2AgNO3

1Ag---------2AgNO3

GRAMSREACTANT 2

GRAMSREACTANT 2

++1Mg(NO3)21Mg(NO3)2 1Ag1Ag1Mg1Mg 2AgNO32AgNO3++

10. When 680 grams of Silver Nitrate reacts with 10. When 680 grams of Silver Nitrate reacts with Magnesium, how many grams of Silver are produced?Magnesium, how many grams of Silver are produced?



680g680g ????

170g/mol170g/mol

÷2AgNO31Ag

680 grams AgNO3 216 grams Ag

?? 22molmol

22molmol

108g/mol108g/mol

x3

AgA1gNO2

= 4 moles AgNO3

= 2 moles Ag = 216 grams Ag

Known

680g AgNO3

1

10. When 680 grams of Silver Nitrate reacts with 10. When 680 grams of Silver Nitrate reacts with Magnesium, how many grams of Silver are produced?Magnesium, how many grams of Silver are produced?

Molar Mass

1mol

170g

Mole Ratio

1Ag

2AgNO3

Molar Mass

108g

1mol

Answer

= 216g Ag

1Mg + 2AgNO3 1Mg(NO3)2 + 1Ag

11. How many grams of Titanium Chloride are needed to produce 141 grams of Magnesium Chloride?



2TiCl3 + 3Mg 3MgCl2 + 2Ti 2TiCl3 + 3Mg 3MgCl2 + 2Ti

SINGLE REPLACEMENT REACTIONSINGLE REPLACEMENT REACTION

GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


2TiCl3---------3MgCl2

2TiCl3---------3MgCl2

GRAMSREACTANT 2

GRAMSREACTANT 2

++3MgCl23MgCl2 2Ti2Ti2TiCl32TiCl3 3Mg3Mg++

11. How many grams of Titanium Chloride are needed to 11. How many grams of Titanium Chloride are needed to produce 141 grams of Magnesium Chloride?produce 141 grams of Magnesium Chloride?



141g141g ????

94g/mol94g/mol

÷3MgCl22TiCl3

141 grams MgCl2 153 grams TiCl3

?? 11molmol

11molmol

153g/mol153g/mol

x

3

2

23TiClMgCl

= 1.5 moles MgCl2

= 1 mole TiCl3 = 153 grams TiCl3

Known

141g MgCl2

1

11. How many grams of Titanium Chloride are needed to 11. How many grams of Titanium Chloride are needed to produce 141 grams of Magnesium Chloride?produce 141 grams of Magnesium Chloride?

Molar Mass

1mol

94g

Mole Ratio

2TiCl3

3MgCl2

Molar Mass

153g

1mol

Answer

= 153g TiCl3

2TiCl3 + 3Mg 3MgCl2 + 2Ti

12. If 54 grams of water are mixed with excess Magnesium Nitride, then how many grams of Ammonia are produced?



1Mg3N2 + 6H2O 2NH3 + 3Mg(OH)21Mg3N2 + 6H2O 2NH3 + 3Mg(OH)2

DOUBLE REPLACEMENT REACTIONDOUBLE REPLACEMENT REACTION

GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


3NH3---------6H2O

3NH3---------6H2O

GRAMSREACTANT 2

GRAMSREACTANT 2

++2NH32NH3 3Mg(OH)23Mg(OH)21Mg3N21Mg3N2 6H2O6H2O++

12. If 54 grams of water are mixed with excess Magnesium 12. If 54 grams of water are mixed with excess Magnesium Nitride, then how many grams of Ammonia are produced?Nitride, then how many grams of Ammonia are produced?



54g54g ????

18g/mol18g/mol

÷6H2O2NH3

54 grams H2O 17 grams NH3

?? 11molmol

11molmol

17g/mol17g/mol

x

3

2

2NH6H O

= 3 moles H2O

= 1 mole NH3 = 17 grams NH3

Known

54g H2O

1

12. If 54 grams of water are mixed with excess Magnesium 12. If 54 grams of water are mixed with excess Magnesium Nitride, then how many grams of Ammonia are produced?Nitride, then how many grams of Ammonia are produced?

Molar Mass

1mol

18g

Mole Ratio

2NH3

6H2O

Molar Mass

17g

1mol

Answer

= 17g NH3

1Mg3N2 + 6H2O 2NH3 + 3Mg(OH)2

13. What mass of Hydrogen Sulfate is needed to completely react with 232 grams of Sodium Chloride?




2NaCl + 1H2SO4 2HCl + 1Na2SO42NaCl + 1H2SO4 2HCl + 1Na2SO4

AVOGADRO STYLEAVOGADRO STYLE

GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


1H2SO4---------2NaCl

1H2SO4---------2NaCl

GRAMSREACTANT 2

GRAMSREACTANT 2

++2HCl2HCl 2Na2SO42Na2SO42NaCl2NaCl 1H2SO41H2SO4++

13. What mass of Hydrogen Sulfate is needed to completely 13. What mass of Hydrogen Sulfate is needed to completely react with 232 grams of Sodium Chloride? react with 232 grams of Sodium Chloride?



232g232g ????

58g/mol58g/mol

÷2NaCl1H2SO4

232 grams NaCl 196 grams H2SO4

?? 22molmol

22molmol

98g/mol98g/mol

x2 41

2H SONaCl

= 4 moles NaCl

= 2 moles H2SO4 = 196 grams H2SO4

Known

232g NaCl

1

13. What mass of Hydrogen Sulfate is needed to completely 13. What mass of Hydrogen Sulfate is needed to completely react with 232 grams of Sodium Chloride? react with 232 grams of Sodium Chloride?

Molar Mass

1mol

58g

Mole Ratio

1H2SO4

2NaCl

Molar Mass

98g

1mol

Answer

= 196g H2SO4

2NaCl + 1H2SO4 2HCl + 1Na2SO4

14. How many grams of Lithium Hydroxide will react with 147 grams of Hydrogen Phosphate?




3LiOH + 1H3PO4 1Li3PO4 + 3H2O3LiOH + 1H3PO4 1Li3PO4 + 3H2O

GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


3LiOH---------1H3PO4

3LiOH---------1H3PO4

GRAMSREACTANT 2

GRAMSREACTANT 2

++1Li3PO41Li3PO4 3H2O3H2O3LiOH3LiOH 1H3PO41H3PO4++

14. How many grams of Lithium Hydroxide will react with 14. How many grams of Lithium Hydroxide will react with 147 grams of Hydrogen Phosphate?147 grams of Hydrogen Phosphate?



147g147g ????

98g/mol98g/mol

÷1H3PO43LiOH

232 grams H3PO4 108 grams LiOH


24g/mol24g/mol

x3 4

31LiOHH PO

= 1.5 moles H3PO4

= 4.5 moles LiOH = 108 grams LiOH

Known

147g H3PO4

1

14. How many grams of Lithium Hydroxide will react with 14. How many grams of Lithium Hydroxide will react with 147 grams of Hydrogen Phosphate?147 grams of Hydrogen Phosphate?

Molar Mass

1mol

98g

Mole Ratio

3LiOH

1H3PO4

Molar Mass

24g

1mol

Answer

= 108g LiOH

3LiOH + 1H3PO4 1Li3PO4 + 3H2O

15. If 110 grams of Carbon Dioxide is produced from combusting Butene, then how many grams of Oxygen is needed?



COMBUSTION REACTIONCOMBUSTION REACTION

1C4H8 + 6O2 4CO2 + 4H2O1C4H8 + 6O2 4CO2 + 4H2O

GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


6O2---------4CO2

6O2---------4CO2

GRAMSREACTANT 2

GRAMSREACTANT 2

++4CO24CO2 4H2O4H2O1C4H81C4H8 6O26O2++

15. If 110 grams of Carbon Dioxide is produced from combusting 15. If 110 grams of Carbon Dioxide is produced from combusting Butene, then how many grams of Oxygen is needed?Butene, then how many grams of Oxygen is needed?



110g110g ????

44g/mol44g/mol

÷4CO26O2

110 grams CO2 120 grams O2

?? 3.753.75molmol3.753.75molmol

32g/mol32g/mol

x

2

2

6O4CO

= 2.5 moles CO2

= 3.75 moles O2 = 120 grams O2

Known

110g CO2

1

15. If 110 grams of Carbon Dioxide is produced from combusting 15. If 110 grams of Carbon Dioxide is produced from combusting Butene, then how many grams of Oxygen is needed?Butene, then how many grams of Oxygen is needed?

Molar Mass

1mol

44g

Mole Ratio

6O2

4CO2

Molar Mass

32g

1mol

Answer

= 120g O2

1C4H8 + 6O2 4CO2 + 4H2O

16. If 216 grams of Water is produced from combusting Propane, then how many grams of Carbon Dioxide is also produced?



COMBUSTION REACTIONCOMBUSTION REACTION

1C3H8 + 5O2 3CO2 + 4H2O1C3H8 + 5O2 3CO2 + 4H2O

GRAMSREACTANT 1

GRAMSREACTANT 1

GRAMSPRODUCT 2

GRAMSPRODUCT 2

GRAMSPRODUCT 1

GRAMSPRODUCT 1


3CO2---------4H2O

3CO2---------4H2O

GRAMSREACTANT 2

GRAMSREACTANT 2

++3CO23CO2 4H2O4H2O1C3H81C3H8 5O25O2++

16. If 216 grams of Water is produced from combusting Propane, 16. If 216 grams of Water is produced from combusting Propane, then how many grams of Carbon Dioxide is also produced?then how many grams of Carbon Dioxide is also produced?



216g216g ????

18g/mol18g/mol

÷3CO24H2O

232 grams H2O 396 grams CO2

?? 99molmol

99molmol

44g/mol44g/mol

x

2

2

3CO4H O

= 12 moles H2O

= 9 moles CO2 = 396 grams CO2

Known

216g H2O

1

16. If 216 grams of Water is produced from combusting Propane, 16. If 216 grams of Water is produced from combusting Propane, then how many grams of Carbon Dioxide is also produced?then how many grams of Carbon Dioxide is also produced?

Molar Mass

1mol

18g

Mole Ratio

3CO2

4H2O

Molar Mass

44g

1mol

Answer

= 396g CO2

1C3H8 + 5O2 3CO2 + 4H2O





Date post:	15-Dec-2015
Category:	Documents
Upload:	alysha-dewing
View:	213 times
Download:	0 times

Let’s Play Hangman What’s the Word? Based on the law of conservation of mass, a balanced...

Documents