1.3: Mole Ratio, Limiting & Excess Reactants, Percent Yield. Ms. Kiely Coral Gables Senior High IB Chemistry SL

Size: px
Start display at page:

Download "1.3: Mole Ratio, Limiting & Excess Reactants, Percent Yield. Ms. Kiely Coral Gables Senior High IB Chemistry SL"

Transcription

1 1.3: Mole Ratio, Limiting & Excess Reactants, Percent Yield Ms. Kiely Coral Gables Senior High IB Chemistry SL

2 Bell-Ringer #4 Which of the following are empirical formulas? I. C₆H₆ II. C₃H₈ III. N₂O₄ IV. Pb(NO₃)₂ Turn in Lab write-up

3 Bell-Ringer #4 Which of the following are empirical formulas? I. C₆H₆ II. C₃H₈ III. N₂O₄ IV. Pb(NO₃)₂ Only II and IV are empirical formulas, as their elements are in the simplest whole-number ratio. I has the empirical formula CH; III has the empirical formula NO₂

4 189 g HW Review & 20

5 14) 0.20 mol C x 8 mol H = = 0.53 mol H 3 mol C Always begin with your given value. In this problem, we were only given the value 0.20 moles of C. Within 1 mole of propane, C₃H₈, there are 3 moles of C and 8 moles of H. 15) 6.02 x 10²³ atoms of O = 1 mole O 1 mol O x 1 mol H₂SO₄ = mol H₂SO₄ 4 mol O Within 1 mole of H₂SO₄ there are 4 moles of O.

6 16) d. Molar mass of Na₂S₂O₃.5H₂O (2 x 22.99) + (2 x 32.07) + (8 x 16.00) + (10 x 1.01) = g mol ¹ 17) Use the molar mass of calcium arsenate to convert from moles to grams mol Ca₃(AsO₄)₂ x g Ca₃(AsO₄)₂ = 189 g Ca₃(AsO₄)₂ 1 mol Ca₃(AsO₄)₂ 20) g C x 6.02 x 10²³ C atoms = 18.3 x 10²³ = 1.83 x 10²⁴ C atoms g C

7 The term stoichiometry describes the relationships between reactants and products during chemical reactions. For instance, understanding how much of a reactant is needed to make a particular amount of something, or figuring out how much of your product(s) will be formed based on the amount of reactant(s) that you have. It is just like figuring out the perfect recipe! Except instead of this being a recipe for food it is a recipe for a chemical reaction.

8 How many grams of NH₃ are produced when mol of nitrogen reacts with hydrogen? You need to figure out how many grams of NH₃ you will produce, but you only know how many moles of N₂ you have. Step 1: Write out the balanced chemical equation. Step 2: Deduce the mole ratio between your substances of interest, and use this mole ratio to convert from your given substance to your substance of interest. Step 3: Convert your final answer to the desired unit if needed.

9 Step 1: Write out the balanced chemical equation. The balanced equation is necessary for solving any stoichiometry problem. The question is obviously describing a chemical reaction, which means that there must be a chemical equation. Deduce the chemical equation and make sure it is balanced. N₂(g) + 3H₂(g) 2NH₃(g) Step 2: Deduce the mole ratio between your substances of interest, and use this mole ratio to convert from your given substance to your substance of interest. Remember that the coefficients in a chemical reaction symbolize moles. Therefore you can look at the ratio between the amount of nitrogen needed and the amount of ammonia produced. Step 3: Convert your final answer to the desired unit if needed. They supplied you with moles of nitrogen, but they asked you to deduce how many grams of ammonia would be produced. Use molar mass to help you convert.

10 N₂(g) + 3H₂(g) 2NH₃(g) According to the balanced equation, 1 mole of nitrogen produces 2 moles of ammonia. This is a 1:2 mole ratio. Cross-multiply the ratio from the equation with your ratio. Cross-multiply and solve for the missing value. 1 mol N₂ x mol N₂ 2 mol NH₃ x mol NH₃ 1x = 1.20 x = 1.20 Don t forget you just solved in moles! You need grams of NH, so use NH s molar mass to convert mol NH₃ x 17.04g NH₃ 1 mol NH₃ = 20.4g NH₃

11 N₂(g) + 3H₂(g) 2NH₃(g) For some people it is easier to use dimensional analysis in stoichiometry problems. Either way, the steps are the same: mol N₂ x 2 mol NH₃ x 17.04g NH₃ 1 mol N₂ 1 mol NH₃ = 20.4g NH₃ This is the mole ratio, which is obtained from the balanced equation and helps you convert from N₂ to NH₃.

12 Imagine that you are following a recipe to make 12 cookies. It calls for you to mix 2 eggs with 4 cups of flour. You notice that you only have 1 egg, and realize that this means you will only end up using 2 out of the 4 cups of flour, and will end up producing 6 cookies. The number of eggs limited the amount of cookies produced.

13 We can refer to the egg in our situation as the Limiting Reactant and the flour as the Excess Reactant. The cookies would, of course, be the product. -Limiting reactant: the reactant in a chemical reaction that will determine how much of the product(s) will yield, i.e. the two eggs -Excess reactant: the reactant that will not be fully used since there is a limiting reactant, meaning there will be an excess of this reactant remaining, i.e. the flour

14 How many grams of NH₃ are produced when 78.90g of nitrogen reacts with 36.02g of hydrogen? You are being asked to deduce how much ammonia will be theoretically produced given the amount of reactants you have. Therefore, before you can solve for this problem, you must determine which of your reactants is limited in supply and which is in excess.

15 How many grams of NH₃ are produced when 78.90g of nitrogen reacts with 36.02g of hydrogen? Step 1: Deduce the balanced equation 1N₂(g) + 3H₂(g) 2NH₃(g) Step 2: Solve for the limiting reactant To determine the limiting reactant, make sure your reactant values are in moles. Then, divide each value by its respective coefficient g N₂ x 1 mol N₂ = mol N₂ = g N₂ g H₂ x 1 mol H₂ = mol H₂ = g H₂ 3 The lowest quotient is then the limiting reactant! Nitrogen is the limiting reactant.

16 Step 3: Solve using the mole ratio with your limiting reactant. Now that we know that nitrogen is the limiting reactant, we can solve for how much ammonia will theoretically be made given that the nitrogen will run out at some point. Hydrogen is obviously the excess reactant in this case; we will only end up using the amount of hydrogen needed to react with the limited amount of nitrogen we have g N₂ x 1 mol N₂ x 2 mol NH₃ x 17.04g NH₃ = or g NH₃ 28.02g N₂ 1 mol N₂ 1 mol NH₃ 1 mol N₂ = mol N₂ ; x = mol NH₃ ; mol NH₃ x g NH₃ = mol NH₃ x mol NH₃ 1 mol NH₃

17 Practice 1. Calculate the mass of iodine needed to prepare 28.60g of ICl: 2I₂ + KIO₃ + 6HCl 5ICl + KCl + 3H₂O 2. Nitrogen gas can be prepared from this reaction: 2NH₃ + 3 CuO ----> N₂ + 3Cu + 3H₂O 18.1g NH₃ are reacted with 90.40g CuO. Determine the theoretical yield of N₂ produced in grams.

18 Answers 1) 2)

19 Homework STUDY!!!!!! QUIZ NEXT WEEK! Friday 9/9 Worked Example questions in your book are great examples of the types of questions on the quiz :)

Chemical Quantities: Stoichiometry. UNIT 4: Ch. 12 Ms. Kiely, Coral Gables Senior High

Chemical Quantities: Stoichiometry. UNIT 4: Ch. 12 Ms. Kiely, Coral Gables Senior High Chemical Quantities: Stoichiometry UNIT 4: Ch. 12 Ms. Kiely, Coral Gables Senior High 1 BELL RINGER How many moles are in 62.0g of hydrogen gas? ANSWER How many moles are in 62.0g of hydrogen gas? 30.7

More information

1.2: Mole, Conversion Factors, Empirical & Molecular Formulas. Ms. Kiely Coral Gables Senior High IB Chemistry SL

1.2: Mole, Conversion Factors, Empirical & Molecular Formulas. Ms. Kiely Coral Gables Senior High IB Chemistry SL 1.2: Mole, Conversion Factors, Empirical & Molecular Formulas Ms. Kiely Coral Gables Senior High IB Chemistry SL TURN IN the Signed Syllabus and Topic 1 Exercises Bell-Ringer #2 What amount in grams is

More information

Stoichiometry World of Chemistry: Chapter 9

Stoichiometry World of Chemistry: Chapter 9 Stoichiometry World of Chemistry: Chapter 9 Chocolate Chip Cookies!! 1 cup butter 1/2 cup white sugar 1 cup packed brown sugar 1 teaspoon vanilla extract 2 eggs 2 1/2 cups all-purpose flour 1 teaspoon

More information

Quantity Relationships in Chemical Reactions

Quantity Relationships in Chemical Reactions Chapter 10 Relationships in Chemical Reactions Section 10.1 Conversion Factors from a Chemical Equation Goal 1 The coefficients in a chemical equation give us the conversion factors to get from the number

More information

Topic 1 Review. Ms. Kiely Coral Gables Senior High IB Chemistry SL

Topic 1 Review. Ms. Kiely Coral Gables Senior High IB Chemistry SL Topic 1 Review Ms. Kiely Coral Gables Senior High IB Chemistry SL Bell-Ringer A 4 g sample of sodium hydroxide, NaOH, is dissolved in water and made up to 500 cm³ of aqueous solution. What is the concentration

More information

How many molecules are in 0.25 moles of CH 4?

How many molecules are in 0.25 moles of CH 4? Mass Moles- Particle Particles can be atoms, molecules, ions, etc. In one mole of particles, there are 6.02x10 23 particles These particles are so small and we need so many of them to be on a human scale,

More information

Do Now. Agenda Welcome back! The beginning of ALL THE MATH! Homework PBJ procedure Pages 1-3 of HW packet

Do Now. Agenda Welcome back! The beginning of ALL THE MATH! Homework PBJ procedure Pages 1-3 of HW packet Do Now Agenda Welcome back! The beginning of ALL THE MATH! Homework PBJ procedure Pages 1-3 of HW packet All the math Molar Mass the mass of one mole of any substance, reported in grams (gram atomic mass)

More information

1.3: Empirical and Molecular Formulas. Ms. Kiely Coral Gables Senior High IB Chemistry SL

1.3: Empirical and Molecular Formulas. Ms. Kiely Coral Gables Senior High IB Chemistry SL 1.3: Empirical and Molecular Formulas Ms. Kiely Coral Gables Senior High IB Chemistry SL Practice How heavy are 1.20 x 10²⁵ atoms of potassium? ANSWER How many grams in 1.20 x 10²⁵ atoms of potassium?

More information

Outcomes: Interpret a balanced chemical equation in terms of moles, mass and volume of gases. Solve stoichiometric problems involving: moles, mass,

Outcomes: Interpret a balanced chemical equation in terms of moles, mass and volume of gases. Solve stoichiometric problems involving: moles, mass, Stoichiometry Outcomes: Interpret a balanced chemical equation in terms of moles, mass and volume of gases. Solve stoichiometric problems involving: moles, mass, volume, and heat of reaction. Stoichiometry

More information

Start with the Recipe: The Balanced Equation. Then write the data and unknown below the appropriate substances in the equation.

Start with the Recipe: The Balanced Equation. Then write the data and unknown below the appropriate substances in the equation. ADVANCED HONS CHEMISTRY - CHAPTER 2 NAME: STOICHIOMETRY DATE: STOICHIOMETRY PROBLEMS WKST - ANS - V2 PAGE:. 200. g flour (s) + 40 eggs (s) + 5.0 L milk (L) 80 chocolate chip cookies (s) mass (g)? volume

More information

CHAPTER 12. Chemists use balanced to calculate how much reactant is needed or product is formed in a reaction. + 3H 2NH. Hon Chem 12.

CHAPTER 12. Chemists use balanced to calculate how much reactant is needed or product is formed in a reaction. + 3H 2NH. Hon Chem 12. CHAPTER 12 Stoichiometry is the calculation of quantities using different substances in chemical equations. Based on the Law of Conservation of Mass. Mg(s) + How many moles of H Chemists use balanced to

More information

Stoichiometry CHAPTER 12

Stoichiometry CHAPTER 12 CHAPTER 12 Stoichiometry 12.1 Using Everyday Equations Stoichiometry is the calculation of quantities in chemical equations. * The balanced equation gives the ratios for the reactants and products. 3 eggs

More information

Stoichiometry CHAPTER 12

Stoichiometry CHAPTER 12 CHAPTER 12 Stoichiometry 12.1 Using Everyday Equations Stoichiometry is the calculation of quantities in chemical equations. Jan 16 7:57 AM May 24 10:03 AM * The balanced equation gives the ratios for

More information

Start with the Recipe: The Balanced Equation. Then write the data and unknown below the appropriate substances in the equation.

Start with the Recipe: The Balanced Equation. Then write the data and unknown below the appropriate substances in the equation. HONS CHEMISTRY - CHAPTER 2 STOICHIOMETRY STOICHIOMETRY PROBLEMS WKST - ANS - V2 NAME: DATE: PAGE:. 200. g flour (s) + 40 eggs (s) + 5.0 L milk (L) 80 chocolate chip cookies (s) mass (g)? volume (L)? 00

More information

**continued on next page**

**continued on next page** Chapter 9 Stoichiometry Section 9.1 Introduction to Stoichiometry Standard.e.: Students know how to calculate the masses of reactant and products in a chemical reaction from the mass of one of the reactants

More information

The Mole. Relative Atomic Mass Ar

The Mole. Relative Atomic Mass Ar STOICHIOMETRY The Mole Relative Atomic Mass Ar Relative Molecular Mass Mr Defined as mass of one atom of the element when compared with 1/12 of an atom of carbon-12 Some Ar values are not whole numbers

More information

EXTRA CREDIT REMINDER

EXTRA CREDIT REMINDER EXTRA CREDIT REMINDER Due Tonight at Midnight (January 21 at 11:59 pm) via email kimberlyn.jackson@hcbe.net *** Kinesthetic: If you do not know how to use Prezi you may do a power point otherwise email

More information

Atoms, Molecules, and the Mole

Atoms, Molecules, and the Mole The Mole Now that we know how to write and name chemical compounds, we need to understand how chemists use these formulas quantitatively. As chemists, we need to know how many atoms or molecules are reacting

More information

Stoichiometry is the relationship between the amount of reactants used and the amount of products produced in a chemical reaction.

Stoichiometry is the relationship between the amount of reactants used and the amount of products produced in a chemical reaction. Unit 7 STOICHIOMETRY 1. Introduction to Stoichiometry 2. Mole Mole Stoichiometry 3. Mass Mole Stoichiometry 4. Mass Mass Stoichiometry 5. Mass Volume & Volume Volume Stoichiometry 6. Excess & Limiting

More information

Stoichiometry is the relationship between the amount of reactants used and/or the amount of products produced in a chemical reaction.

Stoichiometry is the relationship between the amount of reactants used and/or the amount of products produced in a chemical reaction. Unit 7 STOICHIOMETRY 1. Introduction to Stoichiometry 2. Mole Mole Stoichiometry 3. Mass Mole Stoichiometry 4. Mass Mass Stoichiometry 5. Mass Volume & Volume Volume Stoichiometry 6. Excess & Limiting

More information

Ch 3.3 Counting (p78) One dozen = 12 things We use a dozen to make it easier to count the amount of substances.

Ch 3.3 Counting (p78) One dozen = 12 things We use a dozen to make it easier to count the amount of substances. Ch 3.3 Counting (p78) One dozen = 12 things We use a dozen to make it easier to count the amount of substances. Moles the SI base unit that describes the amount of particles in a substance. Mole is abbreviated

More information

STOICHIOMETRY. Engr. Yvonne Ligaya F. Musico 1

STOICHIOMETRY. Engr. Yvonne Ligaya F. Musico 1 STOICHIOMETRY Engr. Yvonne Ligaya F. Musico 1 Stoichiometry The study in chemistry dealing with calculations based on balanced chemical equations. The branch of chemistry dealing with mass relationships

More information

STOICHIOMETRY. Greek: Stoicheon = element metron = element measuring

STOICHIOMETRY. Greek: Stoicheon = element metron = element measuring STOICHIOMETRY Greek: Stoicheon = element metron = element measuring Stoichiometry is the science of measuring the quantitative proportions or mass ratios in which chemical elements stand to one another

More information

STOICHIOMETRY ANALOGY

STOICHIOMETRY ANALOGY STOICHIOMETRY ANALOGY Stoichiometry is the quantitative relationship between the reactants and products in a balanced chemical equation. Stoichiometry allows chemists to predict how much of a reactant

More information

Stoichiometry is the relationship between the amount of reactants used and the amount of products produced in a chemical reaction.

Stoichiometry is the relationship between the amount of reactants used and the amount of products produced in a chemical reaction. Unit 7 STOICHIOMETRY 1. Introduction to Stoichiometry 2. Mole Mole Stoichiometry 3. Mass Mole Stoichiometry 4. Mass Mass Stoichiometry 5. Mass Volume & Volume Volume Stoichiometry 6. Excess & Limiting

More information

Stoichiometry. A. The Meaning of Coefficients in a Reaction Equation 1. Consider the following reaction: 200 H O H 2 O or

Stoichiometry. A. The Meaning of Coefficients in a Reaction Equation 1. Consider the following reaction: 200 H O H 2 O or Stoichiometry A. The Meaning of Coefficients in a Reaction Equation 1. Consider the following reaction: 2H 2 + O 2 2H 2 O The coefficients in the equation tell us that two hydrogen molecules react with

More information

Finding Formulas. using mass information about a compound to find its formula

Finding Formulas. using mass information about a compound to find its formula Finding Formulas using mass information about a compound to find its formula Molecular Formula Molecular formula is the actual formula of compounds which form molecules. For example, the molecular formula

More information

Unit 6: Stoichiometry. How do manufacturers know how to make enough of their desired product?

Unit 6: Stoichiometry. How do manufacturers know how to make enough of their desired product? Unit 6: Stoichiometry How do manufacturers know how to make enough of their desired product? Chocolate Chip Cookies Using the following recipe, complete the questions. Cookie Recipe 1.5 c sugar 1 c. butter

More information

9/14/ Chemistry Second Edition Julia Burdge. Stoichiometry: Ratios of Combination. Molecular and Formula Masses

9/14/ Chemistry Second Edition Julia Burdge. Stoichiometry: Ratios of Combination. Molecular and Formula Masses 9/14/1 Chemistry Second Edition Julia Burdge Stoichiometry: Ratios of Combination Copyright (c) The McGraw-Hill Companies, Inc. Permission required for reproduction or display. 1 Stoichiometry: Ratios

More information

IGCSE Double Award Extended Coordinated Science

IGCSE Double Award Extended Coordinated Science IGCSE Double Award Extended Coordinated Science Chemistry 4.1 - The Mole Concept The Atomic Mass Unit You need to know the atomic mass unit and the relative atomic mass. In Unit C3.3, 1 atomic mass unit

More information

Proportional Relationships

Proportional Relationships Stoichiometry Video Proportional Relationships 2 1/4 c. flour 1 tsp. baking soda 1 tsp. salt 1 c. butter 3/4 c. sugar 3/4 c. brown sugar 1 tsp vanilla extract 2 eggs 2 c. chocolate chips Makes 5 dozen

More information

Ch. 3 The Mole: Relating the Microscopic World of Atoms to Laboratory Measurements. Brady & Senese, 5th Ed.

Ch. 3 The Mole: Relating the Microscopic World of Atoms to Laboratory Measurements. Brady & Senese, 5th Ed. Ch. 3 The Mole: Relating the Microscopic World of Atoms to Laboratory Measurements Brady & Senese, 5th Ed. Index 3.1 The mole conveniently links mass to number of atoms or molecules 3.2 Chemical formulas

More information

VOCABULARY Define. 1. stoichiometry. 2. composition stoichiometry. 3. reaction stoichiometry. 4. unknown. 5. mole ratio

VOCABULARY Define. 1. stoichiometry. 2. composition stoichiometry. 3. reaction stoichiometry. 4. unknown. 5. mole ratio CHAPTER 9 HOMEWORK 9-1 (pp. 275 279) Define. 1. stoichiometry 2. composition stoichiometry 3. reaction stoichiometry 4. unknown 5. mole ratio SKILL BUILDER On a separate sheet of paper, write five possible

More information

Today is Tuesday, May (!) 1 st, 2018

Today is Tuesday, May (!) 1 st, 2018 In This Lesson: Stoichiometry (Lesson 4 of 4) Today is Tuesday, May (!) 1 st, 2018 Stuff You Need: Calculator Periodic Table Pre-Class: How does an airbag work? In solving a problem of this sort, the grand

More information

Stoichiometry. The study of quantities of substances in chemical reactions

Stoichiometry. The study of quantities of substances in chemical reactions Stoichiometry The study of quantities of substances in chemical reactions Interpreting Chemical Equations N 2 + 3 H 2 2 NH 3 Particles: 1 molecule of Nitrogen reacts with 3 molecules of Hydrogen to produce

More information

Determination of the Formula of a Hydrate. Ms. Kiely Coral Gables Senior High School IB Chemistry SL

Determination of the Formula of a Hydrate. Ms. Kiely Coral Gables Senior High School IB Chemistry SL Determination of the Formula of a Hydrate Ms. Kiely Coral Gables Senior High School IB Chemistry SL Bell-Ringer Read pg 23 and then answer the following questions: 1. What is a hydrated salt, a.k.a hydrated

More information

FSGs are Tuesdays 3:20-4:20 and Wednesdays

FSGs are Tuesdays 3:20-4:20 and Wednesdays CEM 115 toichiometry t Lecture 6 Prof. evian 1 Announcements FGs are Tuesdays 3:20-4:20 and Wednesdays 11:00-12:00 in -1-89 Check out tudent opportunities link on course website - will be updated over

More information

Stoichiometry is the relationship between the amount of reactants used and/or the amount of products produced in a chemical reaction.

Stoichiometry is the relationship between the amount of reactants used and/or the amount of products produced in a chemical reaction. Unit 7 STOICHIOMETRY 1. Introduction to Stoichiometry 2. Mole Mole Stoichiometry 3. Mass Mole Stoichiometry 4. Mass Mass Stoichiometry 5. Mass Volume & Volume Volume Stoichiometry 6. Excess & Limiting

More information

Chemistry 11. Unit 7 - Stoichiometry

Chemistry 11. Unit 7 - Stoichiometry 1 Chemistry 11 Unit 7 - Stoichiometry 2 1. Coefficients of chemical equations In chapter 6, we have learned how to balance a chemical reaction by considering the laws of conservation of atoms and charges.

More information

Molar Mass. The total of the atomic masses of all the atoms in a molecule:

Molar Mass. The total of the atomic masses of all the atoms in a molecule: Molar Mass The total of the atomic masses of all the atoms in a molecule: Ex: H 2 O H (1.0079) x 2 atoms = 2.0158 grams O (15.999) x 1 atom = 15.999 grams 18.0148 grams (18.0 grams) Ex: Cu(NO 3 ) 2 Cu

More information

Stoichiometry. Please take out your notebooks

Stoichiometry. Please take out your notebooks Stoichiometry Please take out your notebooks Stoichiometry stochio = Greek for element metry = measurement Stoichiometry is about measuring the amounts of elements and compounds involved in a reaction.

More information

Stoichiometry Dry Lab

Stoichiometry Dry Lab Stoichiometry Dry Lab Name: Mole-Mass Conversions The molar mass of a substance is the conversion factor that allows us to convert between the mass of a substance (in grams) and the number of moles of

More information

Stoichiometry. The quantitative study of reactants and products in a chemical reaction. Burlingame High School Chemistry

Stoichiometry. The quantitative study of reactants and products in a chemical reaction. Burlingame High School Chemistry Stoichiometry The quantitative study of reactants and products in a chemical reaction 1 Stoichiometry Whether the units given for reactants or products are moles, grams, liters (for gases), or some other

More information

CHEM 120: Introduction to Inorganic Chemistry. Chapters Covered and Test dates. The mole concept and atoms. Avogadro s number

CHEM 120: Introduction to Inorganic Chemistry. Chapters Covered and Test dates. The mole concept and atoms. Avogadro s number CHEM 120: Introduction to Inorganic Chemistry Instructor: Upali Siriwardane (Ph.D., Ohio State University) CTH 311, Tele: 257-4941, e-mail: upali@chem.latech.edu Office hours: 10:00 to 12:00 Tu & Th ;

More information

Energetics & Thermochemistry. Ms. Kiely IB Chemistry SL Coral Gables Senior High School

Energetics & Thermochemistry. Ms. Kiely IB Chemistry SL Coral Gables Senior High School Energetics & Thermochemistry Ms. Kiely IB Chemistry SL Coral Gables Senior High School Bell Ringer The following equation shows the formation of magnesium oxide from magnesium metal. 2Mg(s) + O2(g) 2MgO(s)

More information

Chapter 12 Stoichiometry. Mr. Mole

Chapter 12 Stoichiometry. Mr. Mole Chapter 12 Stoichiometry Mr. Mole Let s make some Cookies! When baking cookies, a recipe is usually used, telling the exact amount of each ingredient. If you need more, you can double or triple the amount

More information

STOICHIOMETRY is. Math-tastic! Let s make some Cookies! 2/21/2015

STOICHIOMETRY is. Math-tastic! Let s make some Cookies! 2/21/2015 Math-tastic! Unit 9: Math of Chemistry Part II - Stoichiometry Lesson # 9.4: The Arithmetic of Equations Mr. Mole 87 STOICHIOMETRY is Greek for measuring elements Pronounced stoy-kee-ahm-uhtree Defined

More information

Chapter 3: Stoichiometry

Chapter 3: Stoichiometry Chapter 3: Stoichiometry Key Skills: Balance chemical equations Predict the products of simple combination, decomposition, and combustion reactions. Calculate formula weights Convert grams to moles and

More information

AP Chemistry: Chapter 3 Notes Outline

AP Chemistry: Chapter 3 Notes Outline AP Chemistry: Chapter 3 Notes Outline Objectives: Balance chemical equations Use dimensional analysis to solve stoichiometric problems Use dimensional analysis to do limiting reactant problems Use dimensional

More information

CHAPTER 9: STOICHIOMETRY

CHAPTER 9: STOICHIOMETRY 9.1 Interpreting a chemical Equation CHAPTER 9: STOICHIOMETRY H 2 (g) + Cl 2 (g) 2 HCl (g) 1 molecule 1 molecule 2 molecules N 2 + 3 H 2 (g) 2 NH 3 (g) molecule(s) molecule(s) molecule(s) It follows that

More information

Chemical Reactions and Stoichiometry. Ms. Grobsky

Chemical Reactions and Stoichiometry. Ms. Grobsky Chemical Reactions and Stoichiometry Ms. Grobsky Wrapping Up the Types of Chemical Reactions We just got done investigating the different types of chemical reactions We can now answer the two questions

More information

Stoichiometry Dry Lab

Stoichiometry Dry Lab Stoichiometry Dry Lab Name: Mole-Mass Conversions The molar mass of a substance is the conversion factor that allows us to convert between the mass of a substance (in grams) and the number of moles of

More information

Chapter 9: Stoichiometry The Arithmetic ti Of Equations

Chapter 9: Stoichiometry The Arithmetic ti Of Equations Chapter 9: Stoichiometry The Arithmetic of Equations Chemical Calculations Limiting Reagent and Percent Yield The Arithmetic ti Of Equations -- The Arithmetic of Equations -- Using Everyday Equations Stoichiometry

More information

Name: Mr. Dolgos Regents Chemistry NOTE PACKET. Unit 5: Moles & Stoichiometry

Name: Mr. Dolgos Regents Chemistry NOTE PACKET. Unit 5: Moles & Stoichiometry Name: Mr. Dolgos Regents Chemistry NOTE PACKET Unit 5: Moles & Stoichiometry 1 UNIT 5: MOLES & STOICHIOMETRY VOCABULARY: 1. Mole 2. Formula mass (FM) 3. Gram formula mass (GFM) 4. Coefficient 5. Subscript

More information

Right Side NOTES ONLY

Right Side NOTES ONLY Ch. 8 Stoichiometry Title and Highlight TN Ch 8.1 Topic: EQ: Right Side NOTES ONLY Date Write Question out (left side of red line) and answer it (Highlight answer) based on from what you read. Write out

More information

WJEC England GCSE Chemistry. Topic 3: Chemical formulae, equations and amount of substance. Notes. (Content in bold is for Higher Tier only)

WJEC England GCSE Chemistry. Topic 3: Chemical formulae, equations and amount of substance. Notes. (Content in bold is for Higher Tier only) WJEC England GCSE Chemistry Topic 3: Chemical formulae, equations and amount of substance Notes (Content in bold is for Higher Tier only) charges on ions an ion is formed when an atom loses or gains electrons

More information

NOTES: 10.3 Empirical and Molecular Formulas

NOTES: 10.3 Empirical and Molecular Formulas NOTES: 10.3 Empirical and Molecular Formulas What Could It Be? Empirical Formulas Indicate the lowest whole number ratio of the atoms in a compound: 1) Determine moles of each element present in the compound

More information

Stoichiometry. Introduction. Rx between Hydrogen and Oxygen can be described as: Balanced equation: Or Avogadros Number: (number of Molecules)

Stoichiometry. Introduction. Rx between Hydrogen and Oxygen can be described as: Balanced equation: Or Avogadros Number: (number of Molecules) Stoichiometry Introduction Rx between Hydrogen and Oxygen can be described as: Balanced equation: Or Or Avogadros Number: (number of Molecules) Or Moles (amount of a substance containing avogadros number

More information

Notes: Unit 7 Moles & Stoichiometry

Notes: Unit 7 Moles & Stoichiometry Regents Chemistry: Notes: Unit 7 Moles & Stoichiometry 1 KEY IDEAS A compound is a substance composed of two or more different elements that are chemically combined in a fixed proportion. A chemical compound

More information

Supplemental Activities. Module: States of Matter. Section: Reaction Stoichiometry Key

Supplemental Activities. Module: States of Matter. Section: Reaction Stoichiometry Key Supplemental Activities Module: States of Matter Section: Reaction Stoichiometry Key Balancing Chemical Reactions Activity 1 The purpose of this activity is to check your understanding of the concept Law

More information

2.9 The Mole and Chemical Equations:

2.9 The Mole and Chemical Equations: 2.9 The Mole and Chemical Equations: Stoichiometry Whether you are making omelettes in a kitchen or soap in a factory, you need to know the quantities of ingredients required to produce a certain quantity

More information

Notes: Unit 7 Moles & Stoichiometry

Notes: Unit 7 Moles & Stoichiometry Regents Chemistry: Notes: Unit 7 Moles & Stoichiometry 1 KEY IDEAS In all chemical reactions there is a conservation of mass, energy, and charge. (3.3a) A balanced chemical equation represents conservation

More information

Student Version Notes: Unit 5 Moles & Stoichiometry

Student Version Notes: Unit 5 Moles & Stoichiometry Name: Regents Chemistry: Mr. Palermo Student Version Notes: Unit 5 Moles & Stoichiometry Name: KEY IDEAS A compound is a substance composed of two or more different elements that are chemically combined

More information

Chemical Reactions and Stoichiometry. Ms. Grobsky

Chemical Reactions and Stoichiometry. Ms. Grobsky Chemical Reactions and Stoichiometry Ms. Grobsky Wrapping Up the Lab As we know, the function of the airbags is to protect the occupant from injuring themselves by hitting against the windshield, steering

More information

STOICHIOMETRY. STOICHIOMETRY Chemists use balanced chemical equations to calculate how much reactant is needed or how much product is formed.

STOICHIOMETRY. STOICHIOMETRY Chemists use balanced chemical equations to calculate how much reactant is needed or how much product is formed. STOICHIOMETRY Stoikheion = element; metron = to measure STOICHIOMETRY Chemists use balanced chemical equations to calculate how much reactant is needed or how much product is formed. provides the same

More information

Notes: Stoichiometry (text Ch. 9)

Notes: Stoichiometry (text Ch. 9) Name Per. Notes: Stoichiometry (text Ch. 9) NOTE: This set of class notes is not complete. We will be filling in information in class. If you are absent, it is your responsibility to get missing information

More information

Stoichiometry is the relationship between the amount of reactants used and the amount of products produced in a chemical reaction.

Stoichiometry is the relationship between the amount of reactants used and the amount of products produced in a chemical reaction. Unit 7 STOICHIOMETRY 1. Introduction to Stoichiometry 2. Mole Mole Stoichiometry 3. Mass Mole Stoichiometry 4. Mass Mass Stoichiometry 5. Mass Volume & Volume Volume Stoichiometry 6. Excess & Limiting

More information

Chapter 9. Stoichiometry. Mr. Mole. NB page 189

Chapter 9. Stoichiometry. Mr. Mole. NB page 189 Chapter 9 Stoichiometry Mr. Mole NB page 189 review Let s make some Cookies! When baking cookies, a recipe is usually used, telling the exact amount of each ingredient. If you need more, you can double

More information

Moles Homework Unit 6

Moles Homework Unit 6 VOCABULARY For each word, provide a short but specific definition from YOUR OWN BRAIN! No boring textbook definitions. Write something to help you remember the word. Explain the word as if you were explaining

More information

UNIT 5: MOLES & STOICHIOMETRY

UNIT 5: MOLES & STOICHIOMETRY *KEY* UNIT 5: MOLES & STOICHIOMETRY *KEY* VOCABULARY: 1. Mole 2. Formula mass (FM) 3. Gram formula mass (GFM) 4. Coefficient 5. Subscript 6. Species 7. Law of conservation of mass 8. Law of conservation

More information

Stoichiometry Ch. 11. I. Stoichiometric Calculations

Stoichiometry Ch. 11. I. Stoichiometric Calculations Stoichiometry Ch. 11 I. Stoichiometric Calculations Background on things you NEED to know how to do: 1. Name/write correct chemical formula 2. Write chemical equations 3. Balance chemical equations 4.

More information

Reading Balanced Chemical Equations (see MHR Text p )

Reading Balanced Chemical Equations (see MHR Text p ) Reading Balanced Chemical Equations (see MHR Text p. 114 118) 2 H 2(g) + O 2(g) 2 H 2 O (l) Read: 2 molecules of hydrogen gas reacts with 1 molecule of oxygen gas to produce 2 molecules of water or 2 moles

More information

UNIT 3 IB MATERIAL BONDING, MOLES & STOICHIOMETRY

UNIT 3 IB MATERIAL BONDING, MOLES & STOICHIOMETRY UNIT 3 IB MATERIAL Name: BONDING, MOLES & STOICHIOMETRY ESSENTIALS: Know, Understand, and Be Able To Apply the mole concept to substances. Determine the number of particles and the amount of substance

More information

Chemical Quantities: Stoichiometry. UNIT 4: Ch. 10 & 11 Ms. Kiely, Coral Gables Senior High

Chemical Quantities: Stoichiometry. UNIT 4: Ch. 10 & 11 Ms. Kiely, Coral Gables Senior High Chemical Quantities: Stoichiometry UNIT 4: Ch. 10 & 11 Ms. Kiely, Coral Gables Senior High 1 Bell Ringer 1. What is the molar mass of MgCl₂? 2. How heavy is a 2.6 mol sample of MgCl₂? 2 10.2: Volume conversions!

More information

Mass Relationships in Chemical Reactions

Mass Relationships in Chemical Reactions Mass Relationships in Chemical Reactions Chapter 3 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Micro World atoms & molecules Macro World grams Atomic mass

More information

9.1 The Arithmetic of Equations > Chapter 9 Stoichiometry. 9.1 The Arithmetic of Equations. 9.2 Chemical Calculations

9.1 The Arithmetic of Equations > Chapter 9 Stoichiometry. 9.1 The Arithmetic of Equations. 9.2 Chemical Calculations Chapter 9 Stoichiometry 9.1 The Arithmetic of Equations 9.2 Chemical Calculations 9.3 Limiting Reagent and Percent Yield 1 Copyright Pearson Education, Inc., or its affiliates. All Rights Reserved. CHEMISTRY

More information

Mass Relationships in Chemical Reactions

Mass Relationships in Chemical Reactions Mass Relationships in Chemical Reactions Chapter 3 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Micro World atoms & molecules Macro World grams Atomic mass

More information

Chapter 4: Chemical and Solution Stoichiometry

Chapter 4: Chemical and Solution Stoichiometry Chapter 4: Chemical and Solution Stoichiometry (Sections 4.1-4.4) 1 Reaction Stoichiometry The coefficients in a balanced chemical equation specify the relative amounts in moles of each of the substances

More information

OCR A GCSE Chemistry. Topic 3: Chemical reactions. Introducing chemical reactions. Notes.

OCR A GCSE Chemistry. Topic 3: Chemical reactions. Introducing chemical reactions. Notes. OCR A GCSE Chemistry Topic 3: Chemical reactions Introducing chemical reactions Notes C3.1a use chemical symbols to write the formulae of elements and simple covalent and ionic compounds For simple ionic

More information

Practice Packet Unit 7: Moles & Stoichiometry

Practice Packet Unit 7: Moles & Stoichiometry PRACTICE PACKET: Unit 7 Moles & Stoichiometry Regents Chemistry: Practice Packet Unit 7: Moles & Stoichiometry Vocabulary: Lesson 1: Lesson 6: Lesson 2: Lesson 4A: Lesson 4B: Lesson 3: Lesson 5: www.chempride.weebly.com

More information

Chapter 3 Stoichiometry. Ratios of combination

Chapter 3 Stoichiometry. Ratios of combination Chapter 3 Stoichiometry Ratios of combination Topics Molecular and formula masses Percent composition of compounds Chemical equations Mole and molar mass Combustion analysis (Determining the formula of

More information

Calculations involving masses Notes

Calculations involving masses Notes Edexcel GCSE Chemistry Topic 1: Key concepts in chemistry Calculations involving masses Notes www.pmt.education 1.41 Describe the limitations of particular representations and models, to include dot and

More information

STOICHIOMETRY. Measurements in Chemical Reactions

STOICHIOMETRY. Measurements in Chemical Reactions STOICHIOMETRY Measurements in Chemical Reactions STOICHIOMETRY Stoichiometry is the analysis of the quantities of substances in a chemical reaction. Stoichiometric calculations depend on the MOLE-MOLE

More information

Counting by mass: The Mole. Unit 8: Quantification of Chemical Reactions. Calculating molar mass. Particles. moles and mass. moles and particles

Counting by mass: The Mole. Unit 8: Quantification of Chemical Reactions. Calculating molar mass. Particles. moles and mass. moles and particles Unit 8: Quantification of Chemical Reactions Chapter 10: The mole Chapter 12: Stoichiometry Counting by mass: The Mole Chemists can t count individual atoms Use moles to determine amounts instead mole

More information

Topics in composition stoichiometry include the calculation of: Molar mass Percent Composition Molecular formula Empirical formulas

Topics in composition stoichiometry include the calculation of: Molar mass Percent Composition Molecular formula Empirical formulas Composition Stoichiometry Composition Stoichiometry NOTES 1 So far, we ve studied the products of a chemical reaction in terms of their identity. Stoichiometry is a branch of chemistry dealing with quantities.

More information

CHAPTER 12: STOICHIOMETRY

CHAPTER 12: STOICHIOMETRY Name: CHAPTER 12: STOICHIOMETRY Period: MOLE TO MOLE RATIO When nitrogen and hydrogen gas are heated under the correct conditions, ammonia gas (NH 3 ) is formed. a. RXN: 1N 2 + 3H 2 2NH 3 b. How many moles

More information

Name Date Class. Match each term in Column B with the correct description in Column A. Write the letter of the correct term on the line.

Name Date Class. Match each term in Column B with the correct description in Column A. Write the letter of the correct term on the line. 12 STOICHIOMETRY Chapter Test B A. Matching Match each term in Column B with the correct description in Column A. Write the letter of the correct term on the line. 1. 2. 3. 4. 5. Column A the substance

More information

Week 3/Th: Lecture Units 6 & 7

Week 3/Th: Lecture Units 6 & 7 Week 3/Th: Lecture Units 6 & 7 Unit 5: The Mole -- definition for counting, molar mass -- stoichiometry and nomenclature -- elemental composition Unit 6: Stoichiometry for Cpds. -- mass, moles and composition

More information

Chemistry 142A, Autumn 2011 Worksheet #3 Answer Key Ch. 3, start of Ch. 4

Chemistry 142A, Autumn 2011 Worksheet #3 Answer Key Ch. 3, start of Ch. 4 Chemistry 142A, Autumn 2011 Worksheet #3 Answer Key Ch. 3, start of Ch. 4 1) There are several important compounds that contain only nitrogen and oxygen. Calculate the mass percent of nitrogen in each

More information

9.1 Information Given by Chemical Equations 9.2 Mole Mole Relationships 9.3 Mass Calculations 9.4 The Concept of Limiting Reactants 9.

9.1 Information Given by Chemical Equations 9.2 Mole Mole Relationships 9.3 Mass Calculations 9.4 The Concept of Limiting Reactants 9. 9.1 Information Given by Chemical Equations 9.2 Mole Mole Relationships 9.3 Mass Calculations 9.4 The Concept of Limiting Reactants 9.5 Calculations Involving a Limiting Reactant 9.6 Percent Yield mole-to-mole

More information

Ch 8 Quant. in Chem RXNs/Stoichiometry STUDY GUIDE Accelerated Chemistry

Ch 8 Quant. in Chem RXNs/Stoichiometry STUDY GUIDE Accelerated Chemistry Ch 8 Quant. in Chem RXNs/Stoichiometry STUDY GUIDE Accelerated Chemistry Name /108 TRUE/FALSE. Write 'T' if the statement is true and 'F' if the statement is false. Correct the False statments by changing

More information

2. Relative molecular mass, M r - The relative molecular mass of a molecule is the average mass of the one molecule when compared with

2. Relative molecular mass, M r - The relative molecular mass of a molecule is the average mass of the one molecule when compared with Chapter 3: Chemical Formulae and Equations 1. Relative atomic mass, A r - The relative atomic mass of an element is the average mass of one atom of an element when compared with mass of an atom of carbon-12

More information

Chapter 3. Mass Relationships in Chemical Reactions

Chapter 3. Mass Relationships in Chemical Reactions Chapter 3 Mass Relationships in Chemical Reactions In this chapter, Chemical structure and formulas in studying the mass relationships of atoms and molecules. To explain the composition of compounds and

More information

Unit 7: Stoichiometry Homework Packet (85 points)

Unit 7: Stoichiometry Homework Packet (85 points) Name: Period: By the end of the Unit 7, you should be able to: Chapter 12 1. Use stoichiometry to determine the amount of substance in a reaction 2. Determine the limiting reactant of a reaction 3. Determine

More information

Mass Relationships in Chemical Reactions

Mass Relationships in Chemical Reactions Mass Relationships in Chemical Reactions Chapter 3 Copyright The McGraw-Hill Companies, Inc. Permission required for reproduction or display. Micro World atoms & molecules Macro World grams Atomic mass

More information

Calculations with Chemical Formulas and Equations

Calculations with Chemical Formulas and Equations Calculations with Chemical Formulas and Equations Mass and Moles of a Substance Chemistry requires a method for determining the numbers of molecules in a given mass of a substance. This allows the chemist

More information

Stoichiometry study of the relationships in a

Stoichiometry study of the relationships in a Note Taking Guide: Episode 801 Name Stoichiometry study of the relationships in a based on equations 2 Mg + O 2 2 MgO The in a give the for the involved in the. Ex. Problem: When elemental aluminum reacts

More information

7.1 Describing Reactions. Burning is a chemical change. When a substance undergoes a chemical change, a chemical reaction is said to take place.

7.1 Describing Reactions. Burning is a chemical change. When a substance undergoes a chemical change, a chemical reaction is said to take place. Burning is a chemical change. When a substance undergoes a chemical change, a chemical reaction is said to take place. Chemical Equations What is the law of conservation of mass? The law of conservation

More information

Stoichiometry. Homework EC. cincochem.pbworks.com. Academic Chemistry DATE ASSIGNMENT

Stoichiometry. Homework EC. cincochem.pbworks.com. Academic Chemistry DATE ASSIGNMENT Unit 10 Resournces Name Academic Chemistry Stoichiometry Homework On-Time LATE DATE ASSIGNMENT 100 70 10.1 10.2 10.3 10.4 10.5 10.6 EC 16 cincochem.pbworks.com Stoichiometry Live in the now. Garth Algar

More information

Topic 9: Redox Processes. IB Chemistry SL Coral Gables Senior High School Ms. Kiely

Topic 9: Redox Processes. IB Chemistry SL Coral Gables Senior High School Ms. Kiely Topic 9: Redox Processes IB Chemistry SL Coral Gables Senior High School Ms. Kiely SPRING BREAK ASSIGNMENT 1) Read Topic 9. 2) Do all worked examples throughout the chapter, and also exercises 1-19. Answers

More information