CHM101 Lab Stoichiometry Grading Rubric
|
|
- Nickolas Lyons
- 6 years ago
- Views:
Transcription
1 Spring 2017 Name CHM101 Lab Stoichiometry Grading Rubric Criteria Points possible Points earned Lab Report Q1 (work and units shown) 2 Q2 (work and units shown) 1.5 Q3 (work and units shown) 2.5 Q4 (reaction balanced, table complete and correct.) 7 Q5 (work and units shown) 1.5 Q6 (work and units shown) 1.5 Q7 (work and units shown) 1.5 Q8 (work and units shown) 2.5 Total 20 Subject to additional penalties at the discretion of the instructor.
2 Stoichiometry Consider a classic recipe for pound cake: 1 pound of eggs, 1 pound of butter, 1 pound of flour, and 1 pound of sugar. (That s why it s called pound cake. ) If you have 4 pounds of butter, how many pounds of sugar, flour, and eggs do you need? You would need 4 pounds each of sugar, flour, and eggs. Now suppose you have 1.00 g H 2. If the chemical reaction follows the balanced chemical equation 2 H 2 (g) + O 2 (g) 2 H 2 O(l) then what mass of oxygen do you need to make water? Curiously, this chemical reaction question is very similar to the pound cake question. Both of them involve relating a quantity of one substance to a quantity of another substance or substances. The relating of one chemical substance to another using a balanced chemical reaction is called stoichiometry. Stoichiometry is a term derived from the Greek words stoicheion (meaning element ) and metron (meaning measure ). Using stoichiometry is a fundamental skill in chemistry; it greatly broadens your ability to predict what will occur and, more importantly, how much is produced. In this exercise, you will explore mass relationships in chemistry using balanced equations and principles of stoichiometry. Let us consider a more complicated example. A recipe for pancakes calls for 2 cups (c) of pancake mix, 1 egg, and 1/2 c of milk. We can write this in the form of a chemical equation: 2 c mix + 1 egg + ½ c milk 1 batch of pancakes If you have 9 c of pancake mix, how much milk do you need? To solve this we will use the recipe above to make a conversion factor for pancake mix and milk. #"$%&" '"#"$%()" *+" '"#"$%()" #"$%&" Use the version of conversion factor that allows cups of pancake mix to cancel and solve for the amount of milk. *"$"%& #"$"%&'(" )"$"%& +""","-"$"%&'(" A balanced chemical equation is nothing more than a recipe for a chemical reaction. The difference is that a balanced chemical equation is written in terms of atoms and molecules, not cups, pounds, and eggs. For example, consider the following chemical equation from above: 2H 2 (g) + O 2 (g) 2H 2 O(l). We can interpret this as, literally, two hydrogen molecules react with one oxygen molecule to make two water molecules. Since we are usually reacting far more than one or two molecules at time, we can also interpret the equation as two moles of hydrogen react with one mole of oxygen to form two moles of water. Some conversion factors based on the reaction stoichiometry are: #$%"& '"#$%"( #$%"& #$%"&! (" '"#$%"( #$%"&! (" These conversions are known as mole- mole factors and can be used to relate moles of one substance to moles of another. For example, suppose we need to know how many moles of oxygen are needed to react with 2.8 moles of hydrogen. As we did with converting units, we start with our given quantity and use the appropriate conversion factor ensuring that the unit mol H 2 cancels:
3 (*+"$%&") (" #"$%&"' (","""#*-"$%&"' (" ("$%&") (" Mole- mole factors can be combined with conversion factors from molar mass to find mass relationships in chemical reactions. Most stoichiometry problems start with the mass of one molecule and ask you to determine the mass of another substance. As with all stoichiometry problems, it is important that you start with a balanced chemical equation. The general strategy for solving these mass- mass problems is below. For example, let us determine the number of grams of SO 3 that would be produced from the reaction of 45.3 g of O 2 with SO 2 : 2 SO 2 (g) + O 2 (g) 2 SO 3 (g) First, we convert the given amount, 45.3 g of O 2, to moles of O 2 using its molar mass (32.00 g/mol): -.*)","' (" #"$%&"' (" /""#*-#"$%&"' (" )(*++","' (" Second, we use the balanced chemical reaction to convert from moles of O 2 to moles of SO 3 : *+,*"$%&"( #" #"$%&"'( )" -""#+.)"$%&"'( )" *"$%&"( #" Finally, we use the molar mass of SO 3 (80.06 g/mol) to convert to the mass of SO 3 : /%#*",-."() *" #$%$&"'"() *" 0"""//1"'"() *" +",-."() *" We can also perform all three steps sequentially, writing them on one line as: -.*)","' (" #"$%&"' (" )(*++","' (" ("$%&"/' )" #"$%&"' (" 0+*+1","/' )" #"$%&"/' )" 2"""((3","/' )" We get the same answer. Note how the initial and all the intermediate units cancel, leaving grams of SO 3, which is what we are looking for, as our final answer. One additional conversion factor used in combination with stoichiometry problems is based on Avogadro s number (N A ): 6.02 x 10 23, the number of particles in a mole. Avogadro s number does not have a particular unit it takes the unit of the type of particle in the problem, usually atoms or molecules. Below, N A is used as a conversion factor to convert moles of iron to atoms of iron. 7.5 mol Fe x 6.02 x 1023 atoms Fe = 4.5 x x10 24 atoms Fe 1 mol Fe
4 CHM 101: Stoichiometry Name Show all work including units for problems a) How many atoms are in 1 mol Cu? b) How many atoms are in mol Cu? c) How many atoms are in 77.8 g Cu? 2. a) How many moles are x molecules of CuSO 4? b) What is the mass of 3.55 x molecules of CuSO 4? 3. How many molecules are in 1.0 Liter of water? (Hint: start by converting to mass)
5 CHM 101: Stoichiometry Name 4. Balance the reaction and complete the following table. Each row is its own question. For example; for row 1, determine the grams of CH 4 based on 1.00 mole of CH 4, and then calculate the moles and grams of the rest of the compounds. For row 2, convert grams of O 2 to moles of O 2, determine moles of the other compounds based on stoichiometry (use the mole- mole factor), then convert each to grams. CH 4 + O 2 CO 2 + H 2 O Molar Mass Moles CH 4 g CH 4 Moles O 2 g O 2 Moles CO 2 g CO 2 Moles H 2 O g H 2 O 1.0 mol 8.9 g 63 g
6 CHM 101: Stoichiometry Name Show all work including units for problems What mass of HgO is required to produce g of O 2 according to the reaction below? 2 HgO (s) 2 Hg (l) + O 2 (g) 6. How many grams of Ag are needed to react with g of Al(NO 3 ) 3 according to the reaction below? Al(NO 3 ) 3 (s) + 3 Ag (s) Al (s) + 3 AgNO 3 (s) 7. The decomposition reaction of sodium azide (NaN 3 ) is used to inflate air bags with nitrogen gas according to the reaction below. If 95 g of N 2 are needed to fully inflate an airbag, how many grams of sodium azide should be used? 2 NaN 3 (s) 3 N 2 (g) + 2 Na(s) 8. Aspirin (C 9 H 8 O 4 ) is industrially made from salicylic acid (C 7 H 6 O 3 ) according reaction below. How many kilograms of salicylic acid are needed to make 15 kg of aspirin? C 7 H 6 O 3 + C 4 H 6 O 3 à C 9 H 8 O 4 + C 2 H 4 O 2 salicylic acid acetic anhydride aspirin acetic acid
CHM101 Lab Stoichiometry Grading Rubric
Name CHM101 Lab Stoichiometry Grading Rubric Criteria Points possible Points earned Lab Report Q1 (work and units shown) 3 Q2 (work and units shown) 2 Q3 (work and units shown) 3 Q4 (work and units shown)
More information4.3 Reaction Stoichiometry
198 Chapter 4 Stoichiometry of Chemical Reactions 4.3 Reaction Stoichiometry By the end of this section, you will be able to: Explain the concept of stoichiometry as it pertains to chemical reactions Use
More informationChapter 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 informationSTOICHIOMETRY & LIMITING REACTANTS UNDERSTANDING MASS RELATIONSHIPS IN CHEMICAL REACTIONS
STOICHIOMETRY & LIMITING REACTANTS UNDERSTANDING MASS RELATIONSHIPS IN CHEMICAL REACTIONS If the number of atoms is conserved in a chemical reaction, the mass must also be conserved as expected from the
More informationStoichiometry 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 informationStoichiometry 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 informationStoichiometry. 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 informationExample Exercise 10.1 Interpreting Chemical Equation Calculations
Example Exercise 10.1 Interpreting Chemical Equation Calculations Given the chemical equation for the combustion of methane, CH 4, balance the equation and interpret the coefficients in terms of (a) moles
More informationStoichiometry 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 informationMolar 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 informationChemical 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 informationUNIT 5: STOICHIOMETRY
UNIT 5: STOICHIOMETRY Outline The Mole Molar Mass, Mass and atoms Molar Mass of Compounds Empirical Formula, Molecular Formula (Not Hydrates) Stoichiometry, Mole Ratios Limiting Reactants, Percent Yield
More informationStoichiometry 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 informationStoichiometry 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 informationStoichiometry. Mr. Mole
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 Thus, a
More informationSTOICHIOMETRY. 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 informationStoichiometry 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 informationUNIT 5: STOICHIOMETRY
UNIT 5: STOICHIOMETRY Outline The Mole Molar Mass, Mass and atoms Molar Mass of Compounds Empirical Formula, Molecular Formula (Not Hydrates) Stoichiometry, Mole Ratios Limiting Reactants, Percent Yield
More informationSTOICHIOMETRY 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 informationChapter 6 Table of Contents
This document is attributed to Dr. David Ball and Dr. Daniel Crane Chapter 6 Table of Contents 6.1 Stoichiometry....page 3 Learning Objective, Example 1, Example 2, Key Takeaways, Exercises and Answers
More informationUnit 5. Chemical Composition
Unit 5 Chemical Composition Counting by Mass Individually mass a few Calculate the average mass of one Can count large numbers of by mass Atomic Mass Unit (amu) 1 amu = 1.66 x 10-24 g Subatomic particles
More informationChemical 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 informationChapter 3. Stoichiometry: Calculations with Chemical Formulas and Equations
Chapter 3. Stoichiometry: Calculations with Chemical Formulas and Equations Lecture Outline 3.1 Chemical Equations The quantitative nature of chemical formulas and reactions is called stoichiometry. Lavoisier
More informationChapter 9 STOICHIOMETRY
Chapter 9 STOICHIOMETRY Section 9.1 The Arithmetic of Equations OBJECTIVE Calculate the amount of reactants required or product formed in a nonchemical process. Section 9.1 The Arithmetic of Equations
More informationStoichiometry 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 informationCHAPTER 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 informationStoichiometric Calculations
Slide 1 / 109 Slide 2 / 109 Stoichiometric Calculations Slide 3 / 109 Table of Contents Click on the topic to go to that section Stoichiometry Calculations with Moles Stoichiometry Calculations with Particles
More informationNotes: 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 informationReactions and Stoichiometry.
Problem Set Reactions and Stoichiometry. Clearly write answers on separate sheets. Show all work and units. 1. Classify the following chemical reactions according to the categories discussed in class.
More informationStoichiometry 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 informationChapter 9. Section #3! Stoichiometry and Cars!
Section #3! Stoichiometry and Cars! CH 9 Section #3 An Air Bag Could Save Your Life q When inflated, air bags slow the motion of a person so that he or she does not strike the inside of a car with as much
More informationDo 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 informationChapter 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 informationName Date Class THE ARITHMETIC OF EQUATIONS
12.1 THE ARITHMETIC OF EQUATIONS Section Review Objectives Calculate the amount of reactants required or product formed in a nonchemical process Interpret balanced chemical equations in terms of interacting
More informationStoichiometric Calculations
Slide 1 / 109 Slide 2 / 109 Stoichiometric Calculations Slide 3 / 109 Slide 4 / 109 Table of Contents Stoichiometry Calculations with Moles Click on the topic to go to that section Stoichiometry Calculations
More informationSTOICHIOMETRY 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 informationSTOICHIOMETRY. 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 informationHow 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 informationAtoms, 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**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 informationNotes: 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 informationMass 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 informationChemistry B11 Chapter 5 Chemical reactions
Chapter 5 Chemical reactions Chemical reactions are classified into five groups: A + B AB Synthesis reactions (Combination) H + O H O AB A + B Decomposition reactions (Analysis) NaCl Na +Cl A + BC AC +
More information2/11/2013 INTRODUCTION. STOICHIOMETRY General Chemistry. Uses of H 2 SO 4. Stoichiometry? Big Deal.
INTRODUCTION STOICHIOMETRY General Chemistry Billions of pounds of chemicals are produced each year across the world. These chemicals help manufacture: Medicines Computer chips and electronic instruments
More informationQuantity 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 informationSTOICHIOMETRY. 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 informationWarm-Up. If I weigh 200 pounds, how many pounds of oxygen make up my body? How much hydrogen?
Warm-Up What are the percentage compositions (by mass) of the following elements in the human body? 1. Oxygen 2. Carbon 3. Hydrogen 4. Nitrogen 5. Calcium (65%) (18%) (10%) (3%) (1.5%) If I weigh 200 pounds,
More informationChemical Equations. Chemical Reaction: Interaction between substances that results in one or more new substances being produced
Chemical Equations Chemical Reaction: Interaction between substances that results in one or more new substances being produced Example: hydrogen + oxygen water Reactants of a Reaction: Starting materials
More informationStudent 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 informationChapter 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 informationThis is Stoichiometry and the Mole, chapter 5 from the book Beginning Chemistry (index.html) (v. 1.0).
This is Stoichiometry and the Mole, chapter 5 from the book Beginning Chemistry (index.html) (v. 1.0). This book is licensed under a Creative Commons by-nc-sa 3.0 (http://creativecommons.org/licenses/by-nc-sa/
More informationCHAPTER 11. The Mole. Mole. One mole of = 6.02 x 10 = 6.02 x 10 CaCl = 6.02 x x 10. Representative Particle. molecules, or formula units
CHAPTER 11 The Mole 11.1 The Mole: Measurement of Matter Matter is measured in one of three ways: (How many?) Mole SI unit that measures the amount of a substance 6.02 x 10 particles of that substance.
More information(2 x 22.4 L H 2 ) + (1 x 22.4 L O 2 ) (2 OBJECTIVES:
Chapter 9 The calculations of quantities in a chemical reaction chemical bookkeeping Section 9.1 The Arithmetic of Equations OBJECTIVES: Calculate the amount of reactants required, or product formed, in
More informationChapter 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 informationCh 9 Stoichiometry Practice Test
Ch 9 Stoichiometry Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1. A balanced chemical equation allows one to determine the a. mole ratio
More information1/7/14. Measuring Matter. How can you convert among the count, mass, and volume of something? Apples can be measured in three different ways.
Chapter 10 Chemical Quantities 102 Mole-Mass and Mole-Volume Relationships 103 Percent Composition and Chemical Formulas 1 Measuring Matter Measuring Matter How can you convert among the count, mass, and
More informationAmerican International School of Johannesburg. Quantitative Revision Questions II
American International School of Johannesburg Quantitative Revision Questions II 1. A toxic gas, A, consists of 53.8 % nitrogen and 46.2 % carbon by mass. At 273 K and 1.01 10 5 Pa, 1.048 g of A occupies
More informationName. Academic Chemistry Stoichiometry Notes. Unit #10 Test Date: cincochem.pbworks.com
Name Academic Chemistry Stoichiometry Notes Unit #10 Test Date: cincochem.pbworks.com Resources Unit 10 Common Polyatomic Ions List 20 Name Common Polyatomic Ion Ions Name Ion acetate C 2 H 3 O 2 or CH3
More informationChapter 3: Stoichiometry
Chapter 3: Stoichiometry Oct 6 2:25 AM What is Stoichiometry? The Meaning of the Word The word Stoichiometry derives from two Greek words: stoicheion (meaning "element") and metron (meaning "measure").
More informationFinding 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 informationAP Chemistry Chapter 3. Stoichiometry
AP Chemistry Chapter 3 Stoichiometry Stoichiometry Is the study of the quantities of substances consumed and produced in chemical reactions Derived from the Greek words stoicheion meaning element and metron
More informationMole: base unit for an amount of substance A mole contains Avogadro s number (N A ) of particles (atoms, molecules, ions, formula units )
Mole: base unit for an amount of substance A mole contains Avogadro s number (N A ) of particles (atoms, molecules, ions, formula units ) N A 6.0 10 mol -1 1 mol substance contains N A Molar mass (g/mol)
More informationUnit 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 informationProportional 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 informationChemical Reactions. Chapter 17
Chemical Reactions Chapter 17 Chemical Equations C+O 2 CO 2 C (s) +O 2 (g) CO 2 (g) Reactants on left, products on right Each are balanced because same number of atoms of reactants as products Some equations
More informationChemistry Stoichiometry: Mole Ratios
a place of mind F A C U L T Y O F E D U C A T I O N Department of Curriculum and Pedagogy Chemistry Stoichiometry: Mole Ratios Science and Mathematics Education Research Group Supported by UBC Teaching
More informationSTOICHIOMETRY. 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 informationMass 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 informationStart 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 informationUnit 10: Stoichiometry. Stoichiometry= the process of using a to determine the relative amounts of reactants and products involved in a reaction.
Unit 10: Stoichiometry Stoichiometry= the process of using a to determine the relative amounts of reactants and products involved in a reaction. Info given by a chemical equation: Chemical changes involve
More informationStoichiometry 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 informationCHAPTER 3: PART 2 8/9/2015. A chemical change (a chemical reaction) converts one substance into another.
8/9/015 A chemical change (a chemical reaction) converts one substance into another. CHAPTER 3: PART Chemical Equations and Stoichiometry Chemical reactions involve: 1. Breaking bonds in the reactants.
More informationHonors Chemistry Unit 6 Moles and Stoichiometry Notes. Intro to the mole 1. What is the chemical mole? 2. What is Avogadro s number?
Honors Chemistry Unit 6 Moles and Stoichiometry Notes Intro to the mole 1. What is the chemical mole? 2. What is Avogadro s number? 3. What does it mean? 4. How is a mole like a dozen doughnuts? Formula
More informationCounting 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 informationName Date Class STUDY GUIDE FOR CONTENT MASTERY
Stoichiometry Section 12.1 What is stoichiometry? In your textbook, read about stoichiometry and the balanced equation. For each statement below, write true or false. 1. The study of the quantitative relationships
More informationSlide 1 / 90. Stoichiometry HW. Grade:«grade» Subject: Date:«date»
Slide 1 / 90 Stoichiometry HW Grade:«grade» Subject: Date:«date» Slide 2 / 90 1 The calculation of quantities in chemical equations is called. A B C D E accuracy and precision dimensional analysis percent
More information1.3: Mole Ratio, Limiting & Excess Reactants, Percent Yield. Ms. Kiely Coral Gables Senior High IB Chemistry SL
1.3: Mole Ratio, Limiting & Excess Reactants, Percent Yield Ms. Kiely Coral Gables Senior High IB Chemistry SL Bell-Ringer #4 Which of the following are empirical formulas? I. C₆H₆ II. C₃H₈ III. N₂O₄ IV.
More informationCh 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 informationTHE MOLE. Chapter 10 Who is that Little Guy with Squinty Eyes?
THE MOLE Chapter 10 Who is that Little Guy with Squinty Eyes? THE MOLE NO, Not this mole, this guy has nothing to do with Chemistry! THINGS YOU SHOULD KNOW Chapter 10 Section 1 and 2 Know what a mole is.
More informationVijaykumar N. Nazare
Std-XI science Unit 1: Some Basic Concepts of Chemistry Vijaykumar N. Nazare Grade I Teacher in Chemistry (Senior Scale) vnn001@ chowgules.ac.in 1.1 IMPORTANCE OF CHEMISTRY Chemistry is the branch of science
More informationThe 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 informationQuantitative Composition of Compounds
Chapter 7 Quantitative Composition of Compounds Making new chemicals is much like following a recipe from a cook book... 1 cup of flour + 2 eggs + ½ tsp baking powder 5 pancakes except you don t get to
More informationMass 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 informationPercent Composition and Empirical Formulas
Percent Composition and Empirical Formulas Content Objectives SWBAT calculate the percent composition by mass of each element in a compound. SWBAT calculate the empirical formula of a compound based on
More informationCalculations 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 informationAnnouncements. discussion tomorrow. tomorrow. 10/15 (Type I) and Wednesday, 10/17 (Type II) by 7:00pm. 1. Bring handout from Tuesday to
Announcements 1. Bring handout from Tuesday to discussion tomorrow. 2. Lab write-up and text W due tomorrow. 3. Electronic omework due Monday, 10/15 (Type I) and Wednesday, 10/17 (Type II) by 7:00pm Stoichiometry
More informationThis is STOICHIOMETRY.
Balanced equations represent the RATIO in which substances combine. The ratio comes from the COEFFICIENTS of the balanced equation. The combining ratio of substances in any chemical reaction is called
More informationUNIT 1 Chemical Reactions Part II Workbook. Name:
UNIT 1 Chemical Reactions Part II Workbook Name: 1 Molar Volume 1. How many moles of a gas will occupy 2.50 L at STP? 2. Calculate the volume that 0.881 mol of gas at STP will occupy. 3. Determine the
More informationChemistry 65 Chapter 6 THE MOLE CONCEPT
THE MOLE CONCEPT Chemists find it more convenient to use mass relationships in the laboratory, while chemical reactions depend on the number of atoms present. In order to relate the mass and number of
More informationStart 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 informationChapter 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 informationFrom Greek: stoicheion (= element) metron (= measure)
Stoichiometry Chapter 12 the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers. Origin From Greek: stoicheion
More informationChemical Equations. shows the results of a chemical process
Chemical Equations Chemical Equations shows the results of a chemical process reactants (reagents) products coefficients the numbers in front of formulas in chemical equations gives the relative number
More informationCHAPTER 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 informationUnit 4: Reactions and Stoichiometry
Unit 4: Reactions and Stoichiometry Reactions Chemical equation Expression representing a chemical reaction Formulas of reactants on the left side Formulas of products on the right side Arrow(s) connect(s)
More informationEXTRA 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 informationI hope you aren't going to tear open the package and count the nails. We agree that. mass of nails = 1340 g g = g
The Mole Concept Counting by weighing The size of molecule is so small that it is physically difficult if not impossible to directly count out molecules. this problem is solved using a common trick. Atoms
More information7.1 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 informationName Date Class. representative particle molar mass representative particles
10.1 THE MOLE: A MEASUREMENT OF MATTER Section Review Objectives Relate Avogadro s number to a mole of a substance Calculate the mass of a mole of any substance Describe methods of measuring the amount
More informationCh. 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