Balancing Equations. Chemical reactions occur when bonds (between the electrons of atoms) are formed or broken Chemical reactions involve
|
|
- Claire Underwood
- 5 years ago
- Views:
Transcription
1 Balancing Equations Chemical reactions occur when bonds (between the electrons of atoms) are formed or broken Chemical reactions involve changes in the chemical composition of matter the making of new materials with new properties energy changes: Bond breaking absorbs Energy (endothermic process) Bond making releases Energy (exothermic process) Symbols represent elements Formulas describe compounds Chemical equations describe a chemical reaction 1
2 Chemical Equations A chemical equation is written as an expression similar to a mathematic equation that can be compared to a recipe that a chemist follows in order to produce desired results. 2
3 Chemical Equations Their Job: Depict the kind of reactants and products and their relative amounts in a reaction. 4 Al (s) + 3 O 2 (g) ---> 2 Al 2 O 3 (s) The numbers in the front are called stoichiometric coefficients The letters (s), (g), and (l) are the physical states of compounds. 3
4 Chemical Equations Because of the principle of the conservation of matter (matter can not be created or destroyed) an equation must be balanced. It must have the same number of atoms of the same kind on both sides. Law of Conservation of Energy MUST ALSO BE FOLLOWED! Energy changes are written in (endo-/ exothermic reactions) Lavoisier,
5 Chemical Equations All chemical equations have reactants and products. We express a chemical equation as follows: Reactants Products The arrow is equivalent to an = math. When we describe the equation we use the word yields or produces instead of equals Example C + O 2 CO 2 This reads carbon plus oxygen react to yield carbon dioxide 5
6 Symbols Used in Equations Solid (s) Liquid (l) Gas (g) Aqueous solution (aq) (dissolved in water) Catalyst H 2 SO 4 or Pt Escaping gas ( ) Change of temperature/ heat energy ( or + 3kJ or 3kJ) *there is no subtraction a negative sign means released/exothermic 6
7 Chemical Reactions and Chemical Equations Reactants Products Evidence that a reaction occurred: a) Color change b) Formation of a solid/precipitate c) Evolution of a gas/bubbling d) Evolution or absorption of heat 7
8 Balancing Equations When balancing a chemical reaction you may add coefficients in front of the compounds to balance the reaction, but you may not change the subscripts. Changing the subscripts changes the compound. Subscripts are determined by the valence electrons (charges for ionic or sharing for covalent) Think back to naming compounds/ determining formulas. NaCl exists, because Na is + and Cl is -, but NaCl 2 does NOT exist since you would not have a neutral compound! You can t just add a number to a formula to balance an equation. 8
9 Chemical Equations 4 Al(s) + 3 O 2 (g) ---> 2 Al 2 O 3 (s) This equation means 4 Al atoms + 3 O 2 molecules ---produces---> 2 molecules of Al 2 O 3 AND/OR 4 moles of Al + 3 moles of O produces---> 2 moles of Al 2 O 3 9
10 Steps to Balancing Equations Write the correct formula for the reactants and the products. DO NOT TRY TO BALANCE IT YET! You must write the correct formulas first. **And most importantly, once you write them correctly DO NOT CHANGE THE FORMULAS! Take one element at a time, working left to right except for H and O. Metals, then nonmetals are a good way, too. Save H for next to last, and O until last. 10
11 Steps to Balancing Equations IF everything balances except for O, and there is no way to balance O with a whole number, double all the coefficients and try again. (Because O is diatomic as an element) (Shortcut) Polyatomic ions that appear on both sides of the equation should be balanced as independent units Check your answer to see if: The numbers of atoms on both sides of the equation are now balanced. The coefficients are in the lowest possible whole number ratios. (reduced) 11
12 Balancing Equations 2 H 2 (g) + O 2 (g) ---> 2 H 2 O(l) What Happened to the Other Oxygen Atom????? This equation is not balanced! Two hydrogen atoms from a hydrogen molecule (H 2 ) combine with one of the oxygen atoms from an oxygen molecule (O 2 ) to form H 2 O. Then, the remaining oxygen atom combines with two more hydrogen atoms (from another H 2 molecule) to make a second H 2 O molecule. 12
13 Balance this equation! Na + Cl 2 Na-1 Cl- 2 NaCl Na-1 Cl-1 **note that the number of sodiums balance but the chlorine does not. We will have to use coefficients in order to balance this equation. 13
14 Inserting subscripts Na + Cl 2 2 NaCl Na-1 Na- 1 2 Cl- 2 Cl- 1 2 ** Now the chlorine balances but the sodium does not! So we go back and balance the sodium. 14
15 Finally balanced! 2Na + Cl 2 2 NaCl Na-1 2 Na-1 2 Cl- 2 Cl-1 2 **Since the number of each element on the reactant side and the product side of the equation are equal, the equation is balanced. 15
16 Balancing Equations 2 Al(s) + 3 Br 2 (l) ---> Al 2 Br 6 (s) 16
17 Balancing Equations Sodium phosphate + iron (III) oxide sodium oxide + iron (III) phosphate 2 Na 3 PO 4 + Fe 2 O > Na 2 O 3+ FePO
Balancing Equations. Reactants: Zn + I 2 Product: Zn I 2
Balancing Equations 1 Reactants: Zn + I 2 Product: Zn I 2 2 Chemical Equations Their Job: Depict the kind of reactants and products and their relative amounts in a reaction. 4 Al (s) + 3 O 2 (g) ---> 2
More informationKWL CHART--REACTIONS
1 KWL CHART--REACTIONS What do I already know about chemical reactions? What do I want to know about chemical reactions? What have I learned today about chemical reactions? 2 Intro video: types of reactions
More informationCHEMICAL REACTIONS. Discuss breaking/forming bonds 10/29/2012. Products Reactants
CHEMICAL REACTIONS - Page 321 Products Reactants Reactants: Zn + I 2 Product: Zn I 2 Discuss breaking/forming bonds Chemical Reaction or Change process in which one or more substances are converted into
More informationCHEMICAL REACTIONS. Introduction. Chemical Equations
CHEMICAL REACTIONS Chemistry I Chapter 7 1 Chemical Equations Their Job: Depict the kind of reactants and products and their relative amounts in a reaction. 4 Al (s) + 3 O 2 (g) ---> 2 Al 2 O 3 (s) The
More informationChemical Equations. Physical Science
Chemical Equations Physical Science Chemical Equations A chemical equation is a shorthand way of expressing a chemical reaction. CHEMICAL REACTIONS Reactants: Zn + I 2 Product: Zn I 2 Chemical reactions
More informationChemical Reactions: The Law of Conservation of Mass
Chemical Reactions: The Law of Conservation of Mass What happens in a Chemical Reaction? Chemical bonds in the reactants are broken, then atoms are rearranged to form new substances (products). Reactants
More informationCHAPTER 8 CHEMICAL REACTIONS AND EQUATIONS
CHAPTER 8 CHEMICAL REACTIONS AND EQUATIONS CHEMICAL REACTIONS Occurs when matter combines or breaks apart to produce new kinds of matter with different properties with a change in energy. EVIDENCE FOR
More informationBalancing Hydrocarbons
Balancing Equations a. Add coefficients to make atoms the same on both sides b. Must balance Metals first, then Nonmetals, followed by Hydrogen, and Oxygen last ( met nine hairy oxen ) c. Adjust totals
More informationSection 1 Chemical Changes
Chemical Reactions Chemical Reactions Section1 Chemical Reactions slides 3-20 Section 2 Chemical Equations slides 21-34 Section 3 Classifying Chemical Reactions slides 35-46 Sections 4 Chemical Reactions
More informationScience 1206 Ch. 3 - Chemical names, formulas and equations
Science 1206 Ch. 3 - Chemical names, formulas and equations 3.1 - Ionic and molecular compounds (pp. 98-107) Compounds A compound is a pure substance made of a combination of elements. The elements are
More information2) Solve for protons neutrons and electrons for the bromide ION.
1) Write the formulas for the following a) Calcium nitride c)lithium hydroxide b) Iron (III) sulfide d) sulfuric acid 2) Solve for protons neutrons and electrons for the bromide ION. 3) Write the electron
More informationChemical Reactions. A. Chemical Reactions And The Law Of Conservation Of Mass
Chemical Reactions A. Chemical Reactions And The Law Of Conservation Of Mass 1. A CHEMICAL REACTION is a change that produces new materials with different properties from the starting materials. Various
More informationChoose the answer that best completes each statement.
Name Date CHAPTER TEST: CHEMICAL BONDS AND EQUATIONS Multiple Choice Choose the answer that best completes each statement. 1. Magnesium bromide is an ionic compound with the chemical formula MgBr2. What
More informationWord Equations. Symbols used in equations. Unit 7: Chemical Reactions. hydrogen peroxide water + oxygen
Unit 7: Chemical Reactions Chemical reactions involve a reorganization of the atoms in one or more substances. Can be represented in different ways 1 Word Equations hydrogen peroxide reacts to produce
More information2. Indicators of Chemical Rxns. Abbreviations of State (g) gas (l) liquid (s) solid (aq) aqueous a substance dissolved in water
Unit 6 Chemical Reactions 1. Parts of a Chemical Reaction 2. Indicators of a Chemical Reaction 3. Enthalpy 4. Balancing Chemical Equations 5. Word Equations 6. Classifying Chemical Reactions 7. Predicting
More informationThermodynamics. Standard enthalpy change, H
Standard enthalpy change, H Thermodynamics Enthalpy change, H, is defined as the heat energy change measured under conditions of constant pressure. The value of the enthalpy change for a particular reaction
More informationScience 1206 Chemistry Unit #10
Science 1206 Chemistry Unit #10 Introduction to Chemical Equations Communicating Chemical Changes Chemical change occurs when matter changes into a new and different form. The new form has a new make up
More informationChemical Equations. Their Job: Depict the kind of reactants and products and their relative amounts in a reaction.
Chemical Equations Their Job: Depict the kind of reactants and products and their relative amounts in a reaction. Balancing Equations Law of Conservation of Matter: In a chemical reaction, matter can be
More informationUnit 6. Chemical Reactions
Unit 6 Chemical Reactions Physical Vs. Chemical Change Physical changes= changes in form (phase), but not the identity of the substance ex: H 2 O (s) H 2 O (l) (* Starts as H 2 O and ends as H 2 O) Chemical
More informationvideo 6.1 types of bonds
video 6.1 types of bonds what is a bond? Intramolecular force that holds one to another in a compound The energy stored in a bond is energy 1 why do atoms bond? Atoms bond together to get 8 valence electrons
More informationUnit 5: Chemical Reactions. Chapter 11
Unit 5: Chemical Reactions Chapter 11 Objectives 35 Identify the five types of chemical reactions 36 Write word and chemical equations based on chemical reactions 37 Balance chemical equations 38 Predict
More informationChapter 9 Practice Test
Chapter 9 Practice Test Multiple Choice Identify the choice that best completes the statement or answers the question. 1) Which of the following describes a chemical reaction? a) A gas is given off when
More information1/31/2013 CHEMICAL EQUATIONS & REACTIONS NOTES. Write the formulas of the following compounds: 1. nickel (II) chloride. 2. copper (II) nitrate
CEMICAL EQUATIONS & REACTIONS NOTES Ionic compounds can form from metals Transition metals do not always follow the patterns that we discussed Can have more than one oxidation number () To identify the
More informationChem 101 Review. Fall 2012
Chem 101 Review Fall 2012 Elements, Atoms, Ions Elements in nature symbols Constant composition chemical formula Dalton s atomic theory Atomic structure what makes up the atom ions isotopes Periodic table
More informationChemical Reactions. Section 7.1: Nature of Reactions
Chemical Reactions Section 7.1: Nature of Reactions When do chemical reactions take place? What is the role of energy in chemical reactions? 1 Chemical Reactions It is a change in matter that produces
More informationConservation The Law of Conservation of Matter states that matter cannot be created or destroyed in ordinary chemical reactions. This means that no
Chemical Reactions Conservation The Law of Conservation of Matter states that matter cannot be created or destroyed in ordinary chemical reactions. This means that no atoms can be lost or gained. This
More informationIB Chemistry 1 Mole. One atom of C-12 has a mass of 12 amu. One mole of C-12 has a mass of 12 g. Grams we can use more easily.
The Mole Atomic mass units and atoms are not convenient units to work with. The concept of the mole was invented. This was the number of atoms of carbon-12 that were needed to make 12 g of carbon. 1 mole
More informationChem 11 UNIT 3: STOICHIOMETRY Name:
Chem 11 UNIT 3: STOICHIOMETRY Name: Ms. Pirvu Period: Writing & Balancing Equations Chemical reactions can be described by chemical equations. Recall Law of Conservation of Mass mass cannot be nor. This
More informationChapter 7. Chemical Equations and Reactions
Chemical Equations and Reactions Chemical and Physical Changes In a physical change, the chemical composition of the substance remains constant. Examples of physical changes are the melting of ice or the
More information(DO NOT WRITE ON THIS TEST)
Final Prep Chap 8&9 (DO NOT WRITE ON THIS TEST) Multiple Choice Identify the choice that best completes the statement or answers the question. 1. After the correct formula for a reactant in an equation
More informationIntroduction to Chemical Equations. Introduction to Chemical Equations. How do you write a skeleton equation?
Introduction to Chemical Equations Introduction to Chemical Equations How do you write a skeleton equation? Introduction to Chemical Equations All chemical reactions involve changing substances. In a chemical
More informationCHEMICAL REACTIONS 3/1/2012 PARTS OF A CHEMICAL EQUATION. Reactants: Zn + I 2 Product: ZnI 2. Indicators of chemical reactions
CHEMICAL REACTIONS Reactants: Zn + I 2 Product: ZnI 2 Indicators of chemical reactions Emission of light or heat Production of a gas Formation of a precipitate Color change Emission of odor PARTS OF A
More informationIntroduction to Chemical Reactions. Making new substances
Introduction to Chemical Reactions Making new substances Main Ideas Chemical Reactions are represented by Chemical Equations. Chemical Equations are balanced to show the same number of atoms of each element
More informationSection 1 Chemical Changes
Chemical Reactions Section 1 Chemical Changes What You ll Learn: How to identify the reactants & products in a chemical reaction How a chemical reaction follows the law of conservation of mass How chemists
More informationChemical Symbols & Formulas
+ Chemical Symbols & Formulas + Chemical Symbols All elements in the Periodic Table have symbols that are recognized world wide. It does not matter which country you are in or the language you speak. Example:
More informationScience 10 Chapter 4 Atomic Theory Explains the Formation of Compounds
What is a pure substance? -contains only 1 kind of matter What are the 2 categories of pure substances? -elements -compounds What is an element? -a pure substance that cannot be broken down into simpler
More informationChapter 11. Symbols used in equations indicates a reversible reaction (More later) heat. Chemical Reactions
Chapter 11 Chemical Reactions All chemical reactions have two parts Reactants - the substances you start with Products- the substances you end up with The reactants turn into the products. Reactants Products
More informationUnit 5 Chemical Reactions Notes. Introduction: Chemical substances have physical and chemical properties
Unit 5 Chemical Reactions Notes Introduction: Chemical substances have physical and chemical properties Physical Properties 2 Types of Physical Properties Extensive Physical Properties Intensive Physical
More information5072 CHEMISTRY (NEW PAPERS WITH SPA) BASIC TECHNIQUES 5067 CHEMISTRY (NEW PAPERS WITH PRACTICAL EXAM) BASIC TECHNIQUES
5072 CHEMISTRY (NEW PAPERS WITH SPA) BASIC TECHNIQUES 5067 CHEMISTRY (NEW PAPERS WITH PRACTICAL EXAM) BASIC TECHNIQUES LEARNING OUTCOMES a) Be able to write formulae of simple compounds b) Be able to write
More informationLesson #6: Chemical Reaction Types
Lesson #6: Chemical Types Type #1 The Synthesis In this type of reaction 2 or more elements or compounds combine to form a more complex compound Two or more things become one bigger thing (ex) 2Mg + O
More informationChapter 6: Chemical Bonds
Chapter 6: Chemical Bonds Section 6.1: Ionic Bonding I. Stable Electron Configurations Group # II. III. Ionic Bonds Group # A. Transfer of Electrons Group # B. Formation of Ions Group # C. Formation of
More informationINTRODUCTORY CHEMISTRY Concepts and Critical Thinking
INTRODUCTORY CHEMISTRY Concepts and Critical Thinking Sixth Edition by Charles H. Corwin Chemical Reactions by Christopher Hamaker 1 Chemical and Physical Changes In a physical change, the chemical composition
More information1. Parts of Chemical Reactions. 2 H 2 (g) + O 2 (g) 2 H 2 O(g) How to read a chemical equation
Unit 6 Chemical Reactions 1. Parts of a Chemical Reaction 2. Indicators of a Chemical Reaction 3. Enthalpy 4. Balancing Chemical Equations 5. Word Equations 6. Classifying Chemical Reactions 7. Predicting
More informationChemical Reactions & Equations
Chemical Reactions & Equations + Evidence of Chemical Reactions Release of a gas Example: bubbles formed when magnesium and hydrochloric acid were mixed Color change Example: color went from clear to yellowish
More informationFrom Writing Formulas to Balancing Equations A Tutorial
Chemistry Revised 2013 Name From Writing Formulas to Balancing Equations A Tutorial Period Oxidation Numbers. The Oxidation numbers written as s _ tell whether an element or group of elements lost or gained
More informationScience. Reactions and compounds. Chemical reactions
Science Chemical reactions When elements react, their atoms join with other atoms to form compounds [compound: A compound is a substance formed by the chemical union (involving bond formation) of two or
More information8 th Grade Science. Directed Reading Packet. Chemistry. Name: Teacher: Period:
8 th Grade Science Directed Reading Packet Chemistry Name: Teacher: Period: Chapter 1, Section 1: Inside the Atom Introduction 1. Atoms are the particles of an element that still have the element s. 2.
More informationChemical Bonds And Equations
Chemical Bonds And Equations Intro to Chemical Bonds EQ: Why do atoms have a strong desire to form chemical bonds in nature? What are these called when different types of atoms bond to form a chemically
More informationChemical Bonds & Reactions
Chemical Bonds & Reactions Chemical Bond A force of attraction that holds two atoms together Has a significant effect on chemical and physical properties of compounds involves the valence electrons Valence
More informationExam 3. Objectives: Nomenclature
Exam 3 Objectives: o Nomenclature m-nm, m(vos)-nm, nm-nm o Evidence for Chemical Reactions o Writing Chemical Equations o Balancing Chemical Equations o Classifying Chemical Reactions o Combination Reactions
More informationIntroduction to Chemical Reactions. Chapter 6
Introduction to Chemical Reactions Chapter 6 Instructional Goals 1. Given the reactants and product in a chemical reaction, the student will be able to write and balance chemical equations. 2. Identify
More informationChanges & Chemical Reactions. Unit 5
Changes & Chemical Reactions Unit 5 5 Types of Chemical Reactions Double Decomposition Replacement 1 2 3 4 5 Synthesis Single Replacement Combustion Continue Synthesis 2H 2 + O 2 2H 2 O Menu Decomposition
More informationChem A Ch. 9 Practice Test
Name: Class: Date: Chem A Ch. 9 Practice Test Matching Match each item with the correct statement below. a. product d. balanced equation b. reactant e. skeleton equation c. chemical equation 1. a new substance
More informationChapter 8 Chemical Equations and Reactions
Chapter 8 Chemical Equations and Reactions 8-1 Describing Chemical Reactions Chemical reactions Matter undergoes 2 types of changes: 1.Physical changes no new substance produced 2.Chemical changes new/different
More informationPhysical Science Study Guide
Name: Class: Date: Physical Science Study Guide Multiple Choice Identify the choice that best completes the statement or answers the question. 1. Mendeleev arranged the known chemical elements in a table
More informationElements and Chemical Bonds. Chapter 11
Elements and Chemical Bonds Chapter 11 Essential Question How does understanding periodic trends allow us to predict properties of different elements? Vocabulary Ionic bond Covalent bond Compounds, Chemical
More informationChem101 - Lecture 5. Chemical Equations Chemical equations are used to describe chemical reactions.
Chem101 - Lecture 5 Chemical Reactions Introduction Chemical reactions are processes involving chemical change. In a chemical reaction, one or more pure substances are changed to one or more other pure
More informationCST Review Part 2. Liquid. Gas. 2. How many protons and electrons do the following atoms have?
CST Review Part 2 1. In the phase diagram, correctly label the x-axis and the triple point write the names of all six phases transitions in the arrows provided. Liquid Pressure (ATM) Solid Gas 2. How many
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 informationREVIEW OF BASIC CHEMISTRY ANSWER KEY
REVIEW OF BASIC CHEMISTRY ANSWER KEY 1. Name the following elements. Spelling counts: 2. Write the symbols for the following elements. H hydrogen sodium Na S sulphur phosphorus P Cl chlorine fluorine F
More informationIndicate the answer choice that best completes the statement or answers the question.
Indicate the answer choice that best completes the statement or answers the question. 1. Which of the following bonds is polar? a. F F b. O H c. O O d. H H 2. In the compound, H 2 O, the electrons in the
More informationChemical Bonds & Reactions
Chemical Bonds & Reactions Chemical Bonding Do you understand how it works? What do you think when I pull out a bag of candy? I want that candy cause I don t have any! Does everyone think the same thing?
More informationCHAPTER Describing Chemical Reactions Reactants Products. New substances produced The arrow means yields TYPES OF EQUATIONS.
CHAPTER 11 Chemical Reactions 11.1 Describing Chemical Reactions Reactants Products New substances produced The arrow means yields Where do Chemical Reactions occur? Everywhere!!! In living organisms In
More informationAdvanced Chemistry Final Review
Advanced Chemistry Final Review 1. What are the products of complete combustion of hydrocarbons? Hydrocarbons are compounds made of carbon and oxygen. When they burn (combine with oxygen) they form carbon
More informationName Date Class CHEMICAL REACTIONS. SECTION 11.1 DESCRIBING CHEMICAL REACTIONS (pages )
Name Date Class 11 CHEMICAL REACTIONS SECTION 11.1 DESCRIBING CHEMICAL REACTIONS (pages 321 329) This section explains how to write equations describing chemical reactions using appropriate symbols. It
More informationChemical Bonds & Reactions
Chemical Bonds & Reactions Chemical Bond A force of attraction that holds two atoms together Involves the valence electrons (they determine the chemical characteristics of the atom!) Valence Electrons
More informationChapter 6 and 7 Study Guide Reactions and Bonds
Name_ Per. Block _ Multiple Choice: Chapter 6 and 7 Study Guide Reactions and Bonds 1. Copper is a good conductor of electricity because its electrons A. are positively charged B. are free to move and
More informationChemical Reactions. Chemical changes are occurring around us all the time
Chemical changes are occurring around us all the time Food cooking Fuel being burned in a car s engine Oxygen being used in the human body The starting materials are called reactants The ending materials
More informationThe Periodic Table. run vertically on the periodic table (up and down).
Lesson Objective: The Periodic Table Science 8.5B Interpret the arrangement of the Periodic Table, including groups and periods, to explain how properties are used to classify elements 8.2E Analyze data
More informationClassifying Chemical Reactions
Chem 101 Classifying Chemical Reactions Lectures 17 and 18 Classifying Chemical Reactions Chemical reactions can be divided into five categories: I. Combination or Synthesis Reactions II. Decomposition
More informationCh 100: Fundamentals for Chemistry
Ch 100: Fundamentals for Chemistry Chapter 8: Chemical Equations Lecture Notes Chemical Equations (Intro) 1. Chemical equations are used to symbolically describe chemical reactions 2. In a chemical equation
More informationChapter Introduction Lesson 1 Understanding Chemical Reactions Lesson 2 Types of Chemical Reactions Lesson 3 Energy Changes and Chemical Reactions
Chapter Introduction Lesson 1 Understanding Chemical Reactions Lesson 2 Types of Chemical Reactions Lesson 3 Energy Changes and Chemical Reactions Chapter Wrap-Up Changes in Matter A physical change does
More informationPicture This. Reading Essentials 337. Before burning. After burning
chapter 19 Chemical Reactions section 1 Chemical Changes What You ll Learn how to identify the reactants and products in a chemical reaction how a chemical reaction follows the law of conservation of mass
More informationNotes: Chemical Reactions. Diatomic elements: H 2, N 2, O 2, F 2, Cl 2, Br 2, I 2 I Bring Clay For Our New Hut OR HOBrFINCl
Name Chemistry-PreAP Notes: Chemical Reactions Period Review: Some elements do not occur as single atoms when uncombined with other elements. They will bond with themselves, forming a molecule. In any
More informationRegents Chemistry Unit 3- Bonding, Moles & Stoichiometry Study Guide & Pre-Test KEY
Name: Regents Chemistry Unit 3- Bonding, Moles & Stoichiometry Study Guide & Pre-Test KEY Focus Questions for the Unit: How are compounds different... from elements?... from mixtures? What role do valence
More information11-1 Notes. Chemical Reactions
11-1 Notes Chemical Reactions Chemical Reactions In a chemical reaction 1 or more substances (the reactants) change into 1 or more new substances (the products). Reactants are always written on the left
More informationChapter 2: Mass Relations in Formulas, Chemical Reactions, and Stoichiometry
Previous Chapter Table of Contents Next Chapter Chapter 2: Mass Relations in Formulas, Chemical Reactions, and Stoichiometry Section 2.1: The Atomic Mass The atomic mass is the mass of 1 atom. Atoms are
More informationLesson 01 and 02: Introduction to Chemical Reaction Equations. 01 Chemical Reactions
Chemistry 11, Chemical Reactions, Unit 05 1 Lesson 01 and 02: Introduction to Chemical Reaction Equations 01 Chemical Reactions A chemical reaction is a process by which one or more substances may be transformed
More informationChapter 6: Chemical Bonding
Chapter 6: Chemical Bonding Learning Objectives Describe the formation of ions by electron loss/gain to obtain the electronic configuration of a noble gas. Describe the formation of ionic bonds between
More informationCHAPTER 1: CHEMICAL REACTIONS
CHAPTER 1: CHEMICAL REACTIONS Section 1: Forming New Substances Chemical Changes are responsible for leaf coloring Chemical Reactions Process of one or more substance undergoes change to produce one or
More informationStudent Exploration: Chemical Changes
Name: Date: Student Exploration: Chemical Changes Vocabulary: acid, base, catalyst, chemical change, coefficient, conservation of matter, decomposition, dissolve, double replacement, endothermic, exothermic,
More informationChapter 7 An Introduction to Chemical Reactions. An Introduction to Chemistry by Mark Bishop
Chapter 7 An Introduction to Chemical Reactions An Introduction to Chemistry by Mark Bishop Chapter Map Chemical Reaction A chemical change or chemical reaction is a process in which one or more pure substances
More informationPart 01 - Notes: Reactions & Classification
Objectives: Identify, define, and explain: combination reaction, synthesis reaction, decomposition reaction, single replacement reaction, double replacement reaction, combustion reaction, rapid oxidation,
More information2 Chemical Formulas and Equations
CHAPTER 2 2 Chemical Formulas and Equations SECTIN Chemical Reactions BEFRE YU READ After you read this section, you should be able to answer these questions: What are chemical formulas? What are chemical
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 information8 Chemical Equations. Flames and sparks result when aluminum foil is dropped into liquid bromine.
8 Chemical Equations Flames and sparks result when aluminum foil is dropped into liquid bromine. Chapter Outline 8.1 The Chemical Equation 8.2 Writing and Balancing Chemical Equations 8.3 Types of Chemical
More informationTHE CHEMISTRY OF LIFE
THE CHEMISTRY OF LIFE ATOMS All living things are made up of matter Atoms are the smallest unit of matter Made up of 3 subatomic particles: 1. Protons- positively charged, found in the nucleus, has mass
More informationHonors text: Ch 10 & 12 Unit 06 Notes: Balancing Chemical Equations
Notes: Balancing Chemical Equations Effects of chemical reactions: Chemical reactions rearrange atoms in the reactants to form new products. The identities and properties of the products are completely
More informationStates & Properties of Matter. Unit 1 Topics 4 & 5
States & Properties of Matter Unit 1 Topics 4 & 5 Pure Substances Topic 4 - Elements and Compounds Elements Pure substances that only contain one kind of atom and cannot be separated into a simpler substance.
More informationELEMENTS, COMPOUNDS AND MIXTURES AND HOW THEY ARE REPRESENTED. Jan 12-13, 2014
ELEMENTS, COMPOUNDS AND MIXTURES AND HOW THEY ARE REPRESENTED Jan 12-13, 2014 WHAT ARE ELEMENTS? Elements are pure substances Made of only one kind of material Has definite properties, and Is the same
More informationThe photograph in the textbook provides evidence that an exothermic chemical reaction is occurring.
Preview Lesson Starter Objectives Indications of a Chemical Reaction Characteristics of Chemical Equations Significance of a Chemical Equation Balancing Chemical Equations Section 1 Describing Chemical
More informationForming Chemical Bonds
Forming Chemical Bonds Why do atoms form chemical bonds? so that the system can achieve the lowest possible potential energy Example covalent bonding in H 2 H H Potential energy 0 Distance of separation
More informationCHEMISTRY: A Study of Matter
Review Sheet: Unit 6 Name KEY I. Fill in the blanks with the most appropriate term: Common names of substances like milk of magnesia or lime usually give no information about the chemical composition of
More informationCHEMICAL COMPOSITION AND REACTIONS Chapter 8
CHEMICAL COMPOSITION AND REACTIONS Chapter 8 OUTLINE Oxidation Numbers and Formulas Nomenclature Writing Equations Types of Reactions OXIDATION NUMBERS AND THEIR RULES Oxidation numbers represent the number
More informationChemical Reactions. Ch. 11 Chemical Reactions. Chemical Reactions. Chemical Reactions
Chemical Reactions Ch. 11 Chemical Reactions when a substance changes identity Reactants - original Products - resulting law of conservation of mass total mass of reactants = total mass of products In
More informationDo Now. 2. Why do atoms bond with each other?
Do Now 1. How many valence electrons are transferred from the nitrogen atom to potassium in the formation of the ionic compound potassium nitride? a. 0 b. 1 c. 2 d. 3 2. Why do atoms bond with each other?
More informationChemical Equations. Intro to Stoichiometry. 2Na (s) + Cl 2(g) 2NaCl (s) Reactants Products. The Conservation Laws 4/6/09
Intro to Stoichiometry Chemistry 11 Chemical Equations Various types of evidence suggests that a chemical reaction has occurred. These include: Change in temperature. A colour change may occur. New phases
More informationCHEMICAL REACTIONS. Types of Reactions. Steps to Writing Reactions
Types of Reactions CHEMICAL REACTIONS There are five types of chemical reactions we will talk about: 1. Synthesis reactions 2. reactions 3. Single displacement reactions 4. reactions 5. Combustion reactions
More informationElements combine to form compounds chemical bonds. Chemical Bonding
Elements combine to form compounds chemical bonds Chemical Bonding Review Valence electrons Using periodic table to determine them. General bonding rules: If an atom has 1 to 3 valence electrons, it will
More informationIndicators of chemical reactions
Indicators of chemical reactions Emission of light or heat Formation of a gas Formation of a precipitate Color change Emission of odor All chemical reactions: have two parts Reactants - the substances
More information