Completion Reactions and Reversible Reactions
|
|
- Jeffrey Ross
- 6 years ago
- Views:
Transcription
1 Completion Reactions and Reversible Reactions If enough oxygen gas is provided for the following reaction, almost all of the sulfur will react: S 8 (s) + 8O 2 (g) 8SO 2 (g) Reactions such as this one, in which almost all of the reactants react, are called completion reactions. In other reactions, called reversible reactions, the products can re-form reactants.
2 Completion Reactions and Reversible Reactions, continued Reversible Reactions Reach One reversible reaction occurs when you mix solutions of calcium chloride and sodium sulfate. CaCl 2 (aq) + Na 2 SO 4 (aq) CaSO 4 (s) + 2NaCl(aq) The net ionic equation best describes what happens. Ca 2 ( aq ) SO 2- ( aq ) CaSO ( s) 4 4
3 Completion Reactions and Reversible Reactions, continued Reversible Reactions Reach, continued Solid calcium sulfate, the product, can break down to make calcium ions and sulfate ions in a reaction that is the reverse of the previous one. CaSO ( s ) Ca 2 ( aq ) SO 2- ( aq) 4 4 Use arrows that point in opposite directions when writing a chemical equation for a reversible reaction. Ca ( aq ) SO ( aq ) CaSO ( s)
4 Completion Reactions and Reversible Reactions, continued Reversible Reactions Reach, continued The reactions occur at the same rate after the initial mixing of CaCl 2 and Na 2 SO 4. The amounts of the products and reactants do not change. Chemical equilibrium is a state of balance in which the rate of a forward reaction equals the rate of the reverse reaction and the concentrations of products and reactants remain unchanged.
5 Completion Reactions and Reversible Reactions, continued Opposing Reaction Rates Are Equal at The reaction of hydrogen, H 2, and iodine, I 2, to form hydrogen iodide, HI, reaches chemical equilibrium. H 2( g ) I 2( g ) 2HI( g) Only a very small fraction of the collisions between H 2 and I 2 result in the formation of HI. H 2 (g) + I 2 (g) 2HI(g)
6 Completion Reactions and Reversible Reactions, continued Opposing Reaction Rates Are Equal at, continued After some time, the concentration of HI goes up. As a result, fewer collisions occur between H 2 and I 2 molecules, and the rate of the forward reaction drops. Similarly, in the beginning, few HI molecules exist in the system, so they rarely collide with each other.
7 Completion Reactions and Reversible Reactions, continued Opposing Reaction Rates Are Equal at, continued As more HI molecules are made, they collide more often and form H 2 and I 2 by the reverse reaction. 2HI(g) H 2 (g) + I 2 (g) The greater the number of HI molecules that form, the more often the reverse reaction occurs.
8 Rate Comparison for H 2 (g) + I 2 (g) 2HI(g)
9 Completion Reactions and Reversible Reactions, continued Opposing Reaction Rates Are Equal at, continued When the forward rate and the reverse rate are equal, the system is at chemical equilibrium. If you repeated this experiment at the same temperature, starting with a similar amount of pure HI instead of the H 2 and I 2, the reaction would reach chemical equilibrium again and produce the same concentrations of each substance.
10 Chemical Equilibria Are Dynamic If you drop a ball into a bowl, it will bounce. When the ball comes to a stop it has reached static equilibrium, a state in which nothing changes. Chemical equilibrium is different from static equilibrium because it is dynamic. In a dynamic equilibrium, there is no net change in the system. Two opposite changes occur at the same time.
11 Chemical Equilibria Are Dynamic, continued In equilibrium, an atom may change from being part of the products to part of the reactants many times. But the overall concentrations of products and reactants stay the same. For chemical equilibrium to be maintained, the rates of the forward and reverse reactions must be equal. Arrows of equal length also show equilibrium. reac tan ts products
12 More Examples of Equilibria Even when systems are not in equilibrium, they are continuously changing in order to reach equilibrium. For example, combustion produces carbon dioxide, CO 2, and poisonous carbon monoxide, CO. After combustion, a reversible reaction produces soot. 2CO( g ) C( s ) CO ( g) This reaction of gases and a solid will reach chemical equilibrium. Equilibria can involve any state of matter, including aqueous solutions. 2
13 Chemical Equilibria Are Dynamic, continued In some cases, the equilibrium has a higher concentration of products than reactants. This type of equilibrium is also shown by using two arrows. reac tan ts products The forward reaction has a longer arrow to show that the products are favored.
14 More Examples of Equilibria, continued Equilibria Involving Complex Ions Complex ion, or coordination compound, is the name given to any metal atom or ion that is bonded to more than one atom or molecule. Some ions have a metal ion surrounded by ligands, molecules or anions that readily bond to metal ions. Complex ions may be positively charged cations or negatively charged anions.
15 More Examples of Equilibria, continued Equilibria Involving Complex Ions, continued In this complex ion, [Cu(NH 3 ) 4 ] 2+, ammonia molecules bond to the central copper(ii) ion.
16 More Examples of Equilibria, continued Equilibria Involving Complex Ions, continued Complex ions formed from transition metals are often deeply colored.
17 More Examples of Equilibria, continued Equilibria Involving Complex Ions, continued Consider zinc nitrate dissolving in water: Zn(NO ) ( s ) Zn ( aq ) 2NO ( aq) In the absence of other ligands, water molecules bond with zinc ions. So, this reaction can be written: Zn(NO ) ( s ) 4H O( l ) [Zn(H O) ] ( aq ) 2NO ( aq) If another ligand, such as CN, is added, the new system will again reach chemical equilibrium.
18 More Examples of Equilibria, continued Equilibria Involving Complex Ions, continued Both water molecules and cyanide ions compete to bond with zinc ions, as shown in the equation below. [Zn(H O) ] ( aq ) 4CN ( aq ) [Zn(CN) ] ( aq ) 4H O( l) All of these ions are colorless, so you cannot see which complex ion has the greater concentration.
19 More Examples of Equilibria, continued Equilibria Involving Complex Ions, continued In the chemical equilibrium of nickel ions, ammonia, and water, the complex ions have different colors. You can see which ion has the greater concentration. [Ni(H O) ] ( aq) 6NH ( aq ) [Ni(NH ) ] ( aq) 6H O( l ) green blue-violet The starting concentration of NH 3 will determine which one will have the greater concentration.
20 More Examples of Equilibria, continued Equilibria Involving Complex Ions, continued The charge on a complex ion is a sum of the charges on the species from which the complex ion forms. For example, when the cobalt ion, Co 2+, bonds with four Cl ligands, the total charge is (+2) + 4( 1) = 2. Metal ions and ligands can form complexes that have no charge. These are not complex ions. Complex ions often form in systems that reach equilibrium.
21
Chemical 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 information2 EQUILIBRIUM 2.1 WHAT IS EQUILIBRIUM? 2.2 WHEN IS A SYSTEM AT EQUILIBRIUM? 2.3 THE EQUILIBRIUM CONSTANT
2 EQUILIBRIUM 2.1 WHAT IS EQUILIBRIUM? In general terms equilibrium implies a situation that is unchanging or steady. This is generally achieved through a balance of opposing forces. In chemistry equilibrium
More informationChemical Reactions CHAPTER Reactions and Equations
CHAPTER 9 Chemical Reactions 9.1 Reactions and Equations The process by which atoms of one or more substances are rearranged to form different substances is called a chemical reaction. There are a number
More informationCh. 8 Chemical Reactions
Ch. 8 Chemical Reactions Intro to Reactions I II III IV V Signs of a Chemical Reaction Evolution of heat and light Formation of a gas Formation of a precipitate Color change Law of Conservation of Mass
More informationCHEMICAL COMPOUNDS AND THEIR CHARACTERISTIC PROPERTIES
Seminar_2 1. Chemical compounds and their characteristic properties. 2. Types of chemical bonds (theses). 3. Basic types of complex compounds (theses). 4. Stability of complex compounds. TEST 2_ Chemical
More informationName CHEMISTRY / / Oxide Reactions & Net Ionic Reactions
Name CHEMISTRY / / Oxide Reactions & Net Ionic Reactions The first type of reactions we will look at today are reactions between an oxide (a compound with oxygen as its anion) and water. There are two
More informationc. K 2 CO 3 d. (NH 4 ) 2 SO 4 Answer c
Chem 130 Name Exam 2, Ch 4-6 July 7, 2016 100 Points Please follow the instructions for each section of the exam. Show your work on all mathematical problems. Provide answers with the correct units and
More information2. 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(A) Composition (B) Decomposition (C) Single replacement (D) Double replacement: Acid-base (E) Combustion
AP Chemistry - Problem Drill 08: Chemical Reactions No. 1 of 10 1. What type is the following reaction: H 2 CO 3 (aq) + Ca(OH) 2 (aq) CaCO 3 (aq) + 2 H 2 O (l)? (A) Composition (B) Decomposition (C) Single
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 information( ) Natural Sciences Department. Chemical Reactions
Chemical Reactions Why do atoms cluster? The attraction which keeps atoms united one to each other to form a molecule is called chemical bond. The atoms place themselves in the molecule so that the energy
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 informationBalancing CHEMICAL EQUATIONS
Balancing CHEMICAL EQUATIONS CHEMICAL REACTIONS involves a chemical change in the identity of one or more chemical species Ex. Rusting of iron (Fe): chemical rxn btwn water and iron involve the breaking
More informationC2.6 Quantitative Chemistry Foundation
C2.6 Quantitative Chemistry Foundation 1. Relative masses Use the periodic table to find the relative masses of the elements below. (Hint: The top number in each element box) Hydrogen Carbon Nitrogen Oxygen
More informationTypes of Reactions: Reactions
1 Reactions On the A.P. Test there will be one question (question #4) that will say: Give the formulas to show the reactants and the products for the following chemical reactions. Each occurs in aqueous
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 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 informationTYPES OF CHEMICAL REACTIONS
TYPES OF CHEMICAL REACTIONS Precipitation Reactions Compounds Soluble Ionic Compounds 1. Group 1A cations and NH 4 + 2. Nitrates (NO 3 ) Acetates (CH 3 COO ) Chlorates (ClO 3 ) Perchlorates (ClO 4 ) Solubility
More informationTypes of Reactions: Reactions
1 Reactions On the A.P. Test there will be one question (question #4) that will say: Give the formulas to show the reactants and the products for the following chemical reactions. Each occurs in aqueous
More informationCHAPTER 11: CHEMICAL REACTIONS. Mrs. Brayfield
CHAPTER 11: CHEMICAL REACTIONS Mrs. Brayfield WRITING EQUATIONS Write the chemical equation for the following: Magnesium metal reacts with hydrochloric acid to form aqueous magnesium chloride and hydrogen
More informationelemental state. There are two different possibilities: DESCRIPTION 1. One cation (+ ion) replaces another. 2. One anion (- ion) replaces another.
CHEMICAL TYPES HANDOUT In these reactions, a free element reacts with a compound to form another compound and release one of the elements of the original compound in the elemental state. There are two
More informationName HONORS CHEMISTRY / / Oxide Reactions & Net Ionic Reactions
Name HONORS CHEMISTRY / / Oxide Reactions & Net Ionic Reactions The first type of reactions we will look at today are reactions between an oxide (a compound with oxygen as its anion) and water. There are
More informationChemical Reactions. Chemical Reactions Chemical reactions have a standard format when written:
0.3.notebook A chemical property is a behaviour that occurs when substances change to create a new substance. When a new substance is created, a chemical change has occurred. New colour Evidence of chemical
More informationChapter 8 Chemical Reactions
Chemistry/ PEP Name: Date: Chapter 8 Chemical Reactions Chapter 8: 1 7, 9 18, 20, 21, 24 26, 29 31, 46, 55, 69 Practice Problems 1. Write a skeleton equation for each chemical reaction. Include the appropriate
More informationTYPES OF CHEMICAL REACTIONS
TYPES OF CHEMICAL REACTIONS http://www.youtube.com/watch?v=te4668aarck&feature=related The Five Major Class of Chemical Reaction http://www.youtube.com/watch?v=i HHvx1VC_8 Jan 2 8:07 PM 1 Nov 19 8:48 AM
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 informationChapter 6. Chemical Reactions. Sodium reacts violently with bromine to form sodium bromide.
Chapter 6 Chemical Reactions Sodium reacts violently with bromine to form sodium bromide. Evidence of Chemical Reactions Chemical Equations Reactants Products Reactant(s): Substance(s) present before the
More informationChemical reactions. C2- Topic 5
Chemical reactions C2- Topic 5 What is a chemical reaction? A chemical reaction is a change that takes place when one or more substances (called reactants) form one or more new substances (called products)
More informationIdentify the reaction type, predict the products, and balance the equations. If it is a special decomposition or synthesis, identify which kind.
Identify the reaction type, predict the products, and balance the equations. If it is a special decomposition or synthesis, identify which kind. 1. calcium + oxygen 2. cupric carbonate 3. aluminum + hydrochloric
More informationC2.6 Quantitative Chemistry Foundation
C2.6 Quantitative Chemistry Foundation 1. Relative masses Use the periodic table to find the relative masses of the elements below. (Hint: The top number in each element box) Hydrogen Carbon Nitrogen Oxygen
More informationDefinition: the process by which one or more substances are rearranged to form different substances. Another name for a chemical change.
Chemical Reactions I. What is a chemical reaction? Definition: the process by which one or more substances are rearranged to form different substances. Another name for a chemical change. A. How can you
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 informationSingle Displacement Reactions
Let s writing NIE s for these reaction types, and answering questions about each. 3) Oxidation Reduction Reactions Single Displacement (aka Single Replacement) These may include the following reaction
More informationChapter 8 Chemical Reactions
Chapter 8 Chemical Reactions 8.1 Chemical Reactions Evidence of a Chemical Change Chemical reactions involve rearrangement and exchange of atoms to produce new molecules Remember: matter can neither be
More informationCHEMICAL REACTIONS. The process by which one or more substances are changed into one or more different substances
CHEMICAL REACTIONS The process by which one or more substances are changed into one or more different substances Equations Reactions are represented by a chemical equation Reactants Products Must have
More informationChapter 4. Chemical Quantities and Aqueous Reactions
Lecture Presentation Chapter 4 Chemical Quantities and Aqueous Reactions Reaction Stoichiometry: How Much Carbon Dioxide? The balanced chemical equations for fossilfuel combustion reactions provide the
More informationTypes of Chemical Reactions
Types of Chemical Reactions There are five types of chemical reactions: 1. Formation (combination) 2. Decomposition 3. Single Displacement 4. Double Displacement 5. Combustion 1 Formation (Combination)
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 information11.2 Types of Chemical Reactions> Chapter 11 Chemical Reactions Types of Chemical Reactions Describing Chemical Reactions
Chapter 11 Chemical 11.1 Describing Chemical 11.2 Types of Chemical 11.3 in Aqueous Solution 1 CHEMISTRY & YOU What happens to the wax when you burn a candle? When you burn a candle, a chemical reaction
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 Reaction Types
Chemical Reactions Chemical Reaction Types There are 5 types of chemical reactions that you need to know Combination reaction Decomposition reaction Combustion reaction Single replacement (redox) reaction
More informationUnit 8 Chemical Reactions- Funsheets
Part A- Balancing Equations and Types of Reactions Balance AND identify the following reactions: Unit 8 Chemical Reactions- Funsheets 1) Mg + Zn(NO 3) 2 Zn Mg(NO 3) 2 2) Ba + AgNO 3 Ag + Ba(NO 3) 2 3)
More informationWhat does rate of reaction mean?
Junior Science What does rate of reaction mean? It is not how much of a product is made, but instead how quickly a reaction takes place. The speed of a reaction is called the rate of the reaction. What
More informationChemical Equations and Chemical Reactions
Chemical Equations Chemical Equations and Chemical Reactions Chemical equations are concise representations of chemical reactions. Chemical Equations Symbols Used in Chemical Equations The formulas of
More informationFe(s) + O2(g) Chapter 11 Chemical Reactions. Chemical Equations. Fe + O2. January 26, What is a chemical reaction?
Chapter 11 Chemical Reactions What is a chemical reaction? Chemical Reaction: process by which one or more substances are changed into one or more different substances. Indications of a chemical reaction
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 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 informationShifting Equilibrium. Section 2. Equilibrium shifts to relieve stress on the system. > Virginia standards. Main Idea. Changes in Pressure
Section 2 Main Ideas Equilibrium shifts to relieve stress on the system. Some ionic reactions seem to go to completion. Common ions often produce precipitates. > Virginia standards CH.3.f The student will
More informationReactions in Aqueous Solutions
Copyright 2004 by houghton Mifflin Company. Reactions in Aqueous Solutions Chapter 7 All rights reserved. 1 7.1 Predicting if a Rxn Will Occur When chemicals are mixed and one of these driving forces can
More informationChemical Reactions and Equations
Chemical Reactions and Equations 5-1 5.1 What is a Chemical Reaction? A chemical reaction is a chemical change. A chemical reaction occurs when one or more substances is converted into one or more new
More informationScience 1206 Unit 3: Chemical Reactions Page 1 of 15
Science 1206 Unit 3: Chemical Reactions Page 1 of 15 Introduction to Chemical Reactions Notes Part II TEXT p. 218-219 (word equations) There are many chemical reactions too many to count in fact! Like
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 informationEquilibrium. Chapter How Reactions Occur How Reactions Occur
Copyright 2004 by Houghton Mifflin Company. Equilibrium Chapter 16 ll rights reserved. 1 16.1 How Reactions Occur Kinetics: the study of the factors that effect speed of a rxn mechanism by which a rxn
More informationCHM-201 General Chemistry and Laboratory I Laboratory 4. Introduction to Chemical Reactions (based in part on Small Scale Chemistry methodology as
CHM-201 General Chemistry and Laboratory I Laboratory 4. Introduction to Chemical Reactions (based in part on Small Scale Chemistry methodology as described in Chemtrek by Stephen Thompson at Colorado
More informationUnit A: Equilibrium General Outcomes:
Unit A: Equilibrium General Outcomes: Explain that there is a balance of opposing reactions in chemical equilibrium systems. Determine quantitative relationships in simple equilibrium systems. 2 Read p.
More informationA general statement governing all systems in a state of dynamic equilibrium follows:
Chapter 20 Experiment: LeChâtelier s Principle: Buffers OBJECTIVES: Study the effects of concentration and temperature changes on the position of equilibrium in a chemical system. Study the effect of strong
More informationPHOTOSYNTHESIS as a chemical reaction
CHEMICAL REACTIONS PHOTOSYNTHESIS as a chemical reaction SUNLIGHT CO 2 + H 2 O C 6 H 12 O 6 + O 2 REACTANTS PRODUCTS REACTANTS are the ingredients of a chemical reaction, always listed to the left of the
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 informationCollision Theory. Collision theory: 1. atoms, ions, and molecules must collide in order to react. Only a small number of collisions produce reactions
UNIT 16: Chemical Equilibrium collision theory activation energy activated complex reaction rate reversible reaction chemical equilibrium law of chemical equilibrium equilibrium constant homogeneous equilibrium
More informationNET IONIC REACTIONS in AQUEOUS SOLUTIONS AB + CD AD + CB
NET IONIC REACTIONS in AQUEOUS SOLUTIONS Double replacements are among the most common of the simple chemical reactions. Consider the hypothetical reaction: AB + CD AD + CB where AB exists as A + and B
More informationCH 221 Chapter Four Part II Concept Guide
CH 221 Chapter Four Part II Concept Guide 1. Solubility Why are some compounds soluble and others insoluble? In solid potassium permanganate, KMnO 4, the potassium ions, which have a charge of +1, are
More informationScience 1206 Chemistry Unit #11
Science 1206 Chemistry Unit #11 Types of Chemical Reactions Types of Chemical Reactions Five types of chemical reactions: Formation (synthesis) Decomposition Single Displacement Double Displacement Combustion
More informationDanyal Education (Contact: ) A commitment to teach and nurture
Chemistry of Reactions: Redox (#) Candidates should be able to: a) define oxidation and reduction (redox) in terms of oxygen/hydrogen gain/loss b) define redox in terms of electron transfer and changes
More informationName Honors Chemistry / / Chemical Equations Reactions
Name Honors Chemistry / / Chemical Equations Reactions Like everything else in chemistry, chemical equations follow a few basic patterns. Today we will begin to look at the first of these patterns and
More informationUnit 3: Chemical Equilibrium Chemistry Write balanced chemical equations for each of the following. Pay close attention to the physical states!
Practice Questions Section. The Equilibrium Constant 1. Write balanced chemical equations for each of the following. Pay close attention to the physical states! Also - you must include the charge when
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 informationCHEMISTRY 135 REVISION OF NAMES, FORMULAE AND EQUATIONS
CHEMISTRY 135 REVISION OF NAMES, FORMULAE AND EQUATIONS Answer the following questions as if you were going to hand them in for marking. You will be tested on them in class time. 1) Give the correct chemical
More information1. Balance the following chemical equations: a. C 8 H 18 + O 2 à CO 2 + H 2 O. b. B 5 H 9 + O 2 à B 2 O 3 + H 2 O. c. S 8 + Cl 2 à S 2 Cl 2
EXAM 2 PRACTICE QUESTIONS NOTE- THIS IS ONLY A SELECTION OF POSSIBLE TYPES OF QUESTIONS: REFER TO THE EXAM 2 REVIEW GUIDELINES FOR THE LIST OF LEARNING TARGETS. There will likely be other questions on
More informationBalancing Equations Notes
. Unit 9 Chemical Equations and Reactions What is a Chemical Equation? A is a written representation of the process that occurs in a chemical reaction. A chemical equation is written with the (starting
More informationUNIT 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 informationAtoms What subatomic particles make up the atom?
Atoms What subatomic particles make up the atom? What are the masses of the subatomic particles? What do atomic and mass number represent? What does 7 3 Li represent? How are elements arranged in the periodic
More informationIntroducing Driving Force #3 - Formation of a Solid
Introducing Driving Force #3 - Formation of a Solid A solid that forms in an aqueous reaction is called a precipitate Precipitation reactions are also known as double replacement reactions Cations trade
More informationChemical Equations. Chemical Reactions. The Hindenburg Reaction 5/25/11
Chemical Reactions CHM 1032C Chemical Equations Chemical change involves a reorganization of the atoms in one or more substances. The Hindenburg Reaction Reactants are on left, products to the right. Arrow
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 informationExperiment 8 - Double Displacement Reactions
Experiment 8 - Double Displacement Reactions A double displacement reaction involves two ionic compounds that are dissolved in water. In a double displacement reaction, it appears as though the ions are
More informationName Date Class STUDY GUIDE FOR CONTENT MASTERY
Chemical Reactions Section 10.1 Reactions and Equations In your textbook, read about evidence of chemical reactions. For each statement, write yes if evidence of a chemical reaction is present. Write no
More informationLAB # 5: Metals and Single Replacement Reactions
LAB # 5: Metals and Single Replacement Reactions Purpose: Compare different metals and their reactions with hydrochloric acid. Construct a model of oxidation and reduction in single replacement reactions.
More informationName AP CHEM / / Collected Essays Chapter 17
Name AP CHEM / / Collected Essays Chapter 17 1980 - #2 M(s) + Cu 2+ (aq) M 2+ (aq) + Cu(s) For the reaction above, E = 0.740 volt at 25 C. (a) Determine the standard electrode potential for the reaction
More informationQUESTIONS: Equilibria AS & AS
QUESTION (2012:2) Phosphorus pentachloride gas, PCl 5 (g), decomposes to form phosphorus trichloride gas, PCl 3 (g), and chlorine gas, Cl 2 (g). The equilibrium can be represented as: PCl 5 (g) Ý PCl 3
More informationReaction Stoichiometry and Solution Concentration Q1. FeS(S) + 2HCl(aq) FeCl2(S) + H2S(g) Q2. C6H10(g) + O2(g) CO2(g) + H2O(g) Q3.
Reaction Stoichiometry and Solution Concentration Q1. The reaction between Iron(II) sulfide and HCl is as follows; FeS (S) + 2HCl (aq) FeCl 2(S) + H 2 S (g) What will be the number of moles of each reactant
More information26. N 2 + H 2 NH N 2 + O 2 N 2 O 28. CO 2 + H 2 O C 6 H 12 O 6 + O SiCl 4 + H 2 O H 4 SiO 4 + HCl 30. H 3 PO 4 H 4 P 2 O 7 + H 2 O
Balance the following chemical equations: (Some may already be balanced.) 1. H 2 + O 2 H 2 O 2. S 8 + O 2 SO 3 3. HgO Hg + O 2 4. Zn + HCl ZnCl 2 + H 2 5. Na + H 2 O NaOH + H 2 6. C 10 H 16 + Cl 2 C +
More informationIdentification of ions and gases
For more awesome GSE and level resources, visit us at www.savemyexams.co.uk/ Identification Of ions nd Gases Question Paper Level Subject Exam oard Topic Sub-Topic ooklet O Level hemistry ambridge International
More informationCOMPOUNDS FORM ACCORDING
COMPOUNDS FORM ACCORDING TO A SET OF RULES. Unit B: Matter and Chemical Change Section 3.0 1 3.1 NAMING COMPOUNDS Every compound has a chemical name and a chemical formula: from the shampoo in your bathroom
More informationReactions in aqueous solutions Redox reactions
Reactions in aqueous solutions Redox reactions Redox reactions In precipitation reactions, cations and anions come together to form an insoluble ionic compound. In neutralization reactions, H + ions and
More informationThe Mole Concept. It is easily converted to grams, no of particles or in the case of gas volume.
The Mole Concept The mole is a convenient unit A mole is the number of atoms present in exactly 12 g of the isotope carbon-12. In 12 g of carbon-12 there are 6.022 x 10 23 carbon atoms It is easily converted
More informationYou have mastered this topic when you can: CHEMICAL REACTIONS AND THE KINETIC MOLECULAR THEORY AQUEOUS SOLUTIONS
CH 11 TOPIC 32 CLASSIFYING CHEMICAL REACTIONS PART 2 1 You have mastered this topic when you can: 1) define or describe these terms: aqueous solution, solvent, solute, solubility, soluble, low solubility,
More informationChemistry 141 Samuel A. Abrash Chemical Reactions Lab Lecture 9/5/2011
Chemistry 141 Samuel A. Abrash Chemical Reactions Lab Lecture 9/5/2011 Q: Before we start discussing this week s lab, can we talk about our lab notebooks? Sure. Q: What makes a lab notebook a good notebook?
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 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 informationClassifying Chemical Reactions
1 Classifying Chemical Reactions Analyzing and Predicting Products Introduction The power of chemical reactions to transform our lives is visible all around us-in our cars, even in our bodies. Chemists
More informationIONIC CHARGES. Chemistry 51 Review
IONIC CHARGES The ionic charge of an ion is dependent on the number of electrons lost or gained to attain a noble gas configuration. For most main group elements, the ionic charges can be determined from
More informationReactions (Chapter 4) Notes 2016.notebook. October 14, Chemical Reactions. Chapter 4 Notes. Oct 21 8:44 AM. Oct 22 10:14 AM
Chemical Reactions Chapter 4 Notes Oct 21 8:44 AM Oct 22 10:14 AM 1 There are several things to keep in mind writing reactions and predicting products: 1. States of matter of elements/compounds 2. Diatomics
More informationSolubility Equilibria
Solubility Equilibria Heretofore, we have investigated gas pressure, solution, acidbase equilibriums. Another important equilibrium that is used in the chemistry lab is that of solubility equilibrium.
More informationProperties of Compounds
Chapter 6. Properties of Compounds Comparing properties of elements and compounds Compounds are formed when elements combine together in fixed proportions. The compound formed will often have properties
More informationThe Copper Cycle. HCl(aq) H + (aq) + Cl (aq) HCl(aq) + H 2 O(l) H 3 O + (aq) + Cl (aq)
The Copper Cycle Introduction Many aspects of our lives involve chemical reactions from the batteries that power our cars and cell phones to the thousands of processes occurring within our bodies. We cannot
More informationAcid / Base Properties of Salts
Acid / Base Properties of Salts n Soluble ionic salts produce may produce neutral, acidic, or basic solutions depending on the acidbase properties of the individual ions. n Consider the salt sodium nitrate,
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 informationAcids Bases and Salts Acid
Acids Bases and Salts Acid ph less than 7.0 Sour taste Electrolyte Names of Acids Binary acids Contain only 2 elements Begin with hydro; end with ic Ternary acids Ex: H 2 S = hydrosulfuric Contain a polyatomic
More information7.1 Describing Reactions
Chapter 7 Chemical Reactions 7.1 Describing Reactions Chemical Equations Equation states what a reaction starts with, and what it ends with. Reactants the starting materials that undergo change. (On the
More informationTest Booklet. Subject: SC, Grade: HS 2008 Grade High School Chemistry. Student name:
Test Booklet Subject: SC, Grade: HS 2008 Grade High School Chemistry Student name: Author: North Carolina District: North Carolina Released Tests Printed: Tuesday July 17, 2012 1 How many protons and electrons
More information