What is a Voltaic Cell? Voltaic Cells a.k.a. Electrochemical cells. May 25, Voltaic Cells 2018.notebook
|
|
|
- Shawn Flynn
- 5 years ago
- Views:
Transcription
1 What is a? s a.k.a. Electrochemical cells Aim: To analyze the process of a spontaneous chemical reaction that produces electricity. Voltaic cell: an electrochemical cell where chemical energy is spontaneously converted to electrical energy. The voltage produced by an electrochemical cell is measured in volts. This is called the cell potential. Apr 25 5:02 PM Use Table J to determine which metal is the site of oxidation. Analyzing a The MORE active metal oxidizes and will be the anode, the site of oxidation. Parts of a Two half cells with salt solutions Wire and voltmeter Anode and cathode electrodes Salt bridge The anode must be the negative electrode and the cathode must be the positive electrode. The cathode must attract e lost at the anode and get them to move through the wire so reduction can occur. 1
2 oxidation half reduction half oxidation half Zn > Zn e reduction half Cu e > Cu As Zn (s) metal oxidizes to form Zn +2 (aq) ions, the Zn +2 (aq) ions dissolve into solution. excess positive charge builds up as Zn +2 ions increase Cu +2 + Zn > Cu + Zn +2 excess negative charge builds up as Cu +2 ions decrease Salt Bridge Purpose: the salt bridge permits the flow of ions between the half cells to reduce the build up of excess charge. As (aq) metal cations leave the solution they reduce into Cu (s) and stick onto the Cu cathode. Zinc ( ) Copper ( ) Zinc ( ) Copper ( ) Cu 2+ Zn0 Zn 2+ Zn2+ Zn0 Cu 0 1) Using Table J, determine which electrode is the anode and which is the cathode. Indicate the direction the electrons flow (current). a. Anode: b. Cathode: c. Direction of electron flow: 2) What occurs at the anode? 3) What happens to the electrons lost by the zinc electrode during oxidation? 4) Write the half reaction that occurs at the anode. 5) What happens to the mass of the anode? (hint: "OIL RIG") ZnCl 2(aq) 6) What occurs at the cathode? 7) What is reduced at the cathode? 8) Write the half reaction that occurs at the cathode. 9) What happens to the mass of the cathode? CuCl 2(aq) 10) How does the concentration of the Cu +2 ions change? How does the concentration of the Zn +2 ions change? Sep 2 12:51 PM Sep 2 12:51 PM 2
3 How does a work? VIDEOS at the anode/#.wwvy2zeqwdu The wire connects the electrodes and the salt bridge connects the ionic solutions to complete the circuit. The salt bridge promotes the flow of anions to prevent the buildup of charge in either half cell. Oxidation occurs at the ANODE and as electrons are lost, metal cations form and dissolve into the solution, decreasing the anodes mass through corrosion. Breaking Bad Galvanic Cell The lost electrons from the metal of the anode attract to the positively charged cathode and flow through the wire. The electrons entering the metal cathode allow reduction at the CATHODE. Cations in the solution of the cathode half cell are reduced and they plate onto the cathode electrode, increasing the cathode s mass. The flow of electrons and ions through the completed circuit generates electricity from the chemical reaction. VOLTAIC CELLS ARE SPONTANEOUS. Apr 11 5:02 PM Animations Apr 25 5:34 PM 3
4 Example 1: Mg Na Example 2: Fe K Write the oxidation and reduction half reactions for the cell. Write the oxidation and reduction half reactions for the cell. ox 1/2: ox 1/2: red 1/2: MgCl 2(aq) 2) What happens to the mass of both electrodes? Mg(s) mass Na(s) mass NaCl(aq) red 1/2: 2) What happens to the mass of both electrodes? Fe(s) mass K (s) mass FeCl 3 (aq) KCl (aq) 3) What happens to the concentration of each of the following ions? Mg 2+ concentration Na 1+ concentration 4) Which way do the electrons flow? Apr 26 5:27 PM 3) What happens to the concentration of each of the following ions? Fe +3 concentration K +1 concentration 4) Which way do the electrons flow? Apr 26 5:27 PM Cell #1 Cell #2 Cell #3 Cell #1 May 23 9:11 AM May 22 9:50 AM 4
5 May 23 9:11 AM May 23 9:12 AM 5
6 Attachments Welcome to Discovery Education Player2.asf
OXIDATION-REDUCTIONS REACTIONS. Chapter 19 (From next years new book)
OXIDATION-REDUCTIONS REACTIONS Chapter 19 (From next years new book) ELECTROCHEMICAL REACTIONS: What are electrochemical reactions? Electrons are transferred from one species to another ACTIVATING PRIOR
ELECTROCHEMICAL CELLS
ELECTROCHEMICAL CELLS Electrochemistry 1. Redox reactions involve the transfer of electrons from one reactant to another 2. Electric current is a flow of electrons in a circuit Many reduction-oxidation
Oxidation & Reduction (Redox) Notes
Oxidation & Reduction (Redox) Notes Chemical Activity (or Chemical Reactivity) is the measure of the reactivity of elements. If an element has high activity, then it means that the element is willing to
Zn + Cr 3+ Zn 2+ + Cr. 9. neutrons remain the same: C. remains the same. Redox/Electrochemistry Regents Unit Review. ANSWERS
Redox/Electrochemistry Regents Unit Review. ANSWERS 1. ½ red = Cr 3+ + 3e Cr 2. ½ ox = Zn Zn +2 + 2e 3. Balanced = 3Zn + 2Cr 3+ 3Zn +2 + 2Cr 4. Zn loses electrons, 2Cr 3+ gains electrons Zn + Cr 3+ Zn
Aim: What are electrochemical cells?
Aim: What are electrochemical cells? Electrochemistry Electrochemistry- involves a redox reaction and a flow of electrons TWO TYPES of ELECTROCHEMICAL CELLS 1.Voltaic (similar to a battery) 2.Electrolytic
Oxidation numbers are charges on each atom. Oxidation-Reduction. Oxidation Numbers. Electrochemical Reactions. Oxidation and Reduction
Oxidation-Reduction Oxidation numbers are charges on each atom. 1 2 Electrochemical Reactions Oxidation Numbers In electrochemical reactions, electrons are transferred from one species to another. In order
Introduction. can be rewritten as follows: Oxidation reaction. H2 2H + +2e. Reduction reaction: F2+2e 2F. Overall Reaction H2+F2 2H + +2F
Electrochemistry is the study of chemical processes that cause electrons to move. This movement of electrons is called electricity, which can be generated by movements of electrons from one element to
Electrochemistry Pearson Education, Inc. Mr. Matthew Totaro Legacy High School AP Chemistry
2012 Pearson Education, Inc. Mr. Matthew Totaro Legacy High School AP Chemistry Electricity from Chemistry Many chemical reactions involve the transfer of electrons between atoms or ions electron transfer
ELECTROCHEMICAL CELLS NAME ROW PD
4-26-12 NAME ROW PD (1) Which statement describes the redox reaction that occurs when an object is electroplated? The diagram below shows the electrolysis of fused KCl. A) It is spontaneous and requires
Electrochemistry Virtual Activities AP Chemistry Date: Activity 1 Results for each combination Mg(NO 3 ) 2 Zn(NO 3 ) 2 Cu(NO 3 ) 2 AgNO 3
Electrochemistry Virtual Activities AP Chemistry Name: Date: Part I :Go to http://www.missgurganus.com and click on the Activity Series virtual activity link. (Full web address is http://intro.chem.okstate.edu/1515f01/laboratory/activityofmetals/home.html)
Honors Chemistry Mrs. Agostine. Chapter 19: Oxidation- Reduction Reactions
Honors Chemistry Mrs. Agostine Chapter 19: Oxidation- Reduction Reactions Let s Review In chapter 4, you learned how atoms rearrange to form new substances Now, you will look at how electrons rearrange
Assigning Oxidation Numbers
RULES Assigning Oxidation Numbers Examples 1. Each Uncombined Element has an 2Na + Cl 2 2NaCl oxidation number = 0 Na = 0 or written Na 0 Cl 2 = 0 or written Cl 0 Monatomic ions have an oxidation number
Electrochemical Cells Intro
Electrochemical Cells Intro Outcomes: Outline the historical development of voltaic (galvanic) cells. Explain the operation of a voltaic cell at the visual, particulate and symbolic levels. Vocabulary:
12.05 Galvanic Cells. Zn(s) + 2 Ag + (aq) Zn 2+ (aq) + 2 Ag(s) Ni(s) + Pb 2+ (aq) «Ni 2+ (aq) + Pb(s)
12.05 Galvanic Cells 1. In an operating voltaic cell, reduction occurs A) at the anode B) at the cathode C) in the salt bridge D) in the wire 2. Which process occurs in an operating voltaic cell? A) Electrical
Instructors Guide: Introduction to Voltaic Cells
Instructors Guide: Introduction to Voltaic Cells Standards Connections: Connections to NSTA Standards for Science Teacher Preparation C.3.a.8 Oxidation reduction chemistry. Connections to the National
Introduction to electrochemistry
Introduction to electrochemistry Oxidation reduction reactions involve energy changes. Because these reactions involve electronic transfer, the net release or net absorption of energy can occur in the
Electrochemistry: Voltaic Cells
Name: Band: Date: An Overview and Review Electrochemistry: Voltaic Cells Electrochemistry is the field of chemistry that focuses on reactions involving electrical energy. All electrochemical reactions
mccord (pmccord) HW11 Electrochemistry I mccord (51520) 1
mccord (pmccord) HW11 Electrochemistry I mccord (51520) 1 This print-out should have 27 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001
Redox and Electrochemistry
Redox and Electrochemistry 1 Electrochemistry in Action! 2 Rules for Assigning Oxidation Numbers The oxidation number of any uncombined element is 0. The oxidation number of a monatomic ion equals the
Electrochemistry. The study of the interchange of chemical and electrical energy.
Electrochemistry The study of the interchange of chemical and electrical energy. Oxidation-reduction (redox) reaction: involves a transfer of electrons from the reducing agent to the oxidizing agent. oxidation:
AP CHEMISTRY NOTES 12-1 ELECTROCHEMISTRY: ELECTROCHEMICAL CELLS
AP CHEMISTRY NOTES 12-1 ELECTROCHEMISTRY: ELECTROCHEMICAL CELLS Review: OXIDATION-REDUCTION REACTIONS the changes that occur when electrons are transferred between reactants (also known as a redox reaction)
Galvanic Cells Spontaneous Electrochemistry. Electrolytic Cells Backwards Electrochemistry
Today Galvanic Cells Spontaneous Electrochemistry Electrolytic Cells Backwards Electrochemistry Balancing Redox Reactions There is a method (actually several) Learn one (4.10-4.12) Practice (worksheet)
Find the oxidation numbers of each element in a reaction and see which ones have changed.
Find the oxidation numbers of each element in a reaction and see which ones have changed. Rules for oxidation numbers: An element that is not in a compound has an oxidation number of zero (0) Group 1 Metals
Electrochemical Cells: Virtual Lab
Electrochemical Cells: Virtual Lab Electrochemical cells involve the transfer of electrons from one species to another. In these chemical systems, the species that loses electrons is said to be oxidized
Electrochemical Cells
Electrochemical Cells There are two types: Galvanic and Electrolytic Galvanic Cell: a cell in which a is used to produce electrical energy, i.e., Chemical energy is transformed into Electrical energy.
Unit 8 Redox 8-1. At the end of this unit, you ll be able to
8-1 Unit 8 Redox At the end of this unit, you ll be able to Define and identify oxidation reactions Define and identify reduction reactions Assign oxidation numbers to elements in a compound Write and
What is the importance of redox reactions? Their importance lies in the fact that we can use the transfer of electrons between species to do useful
What is the importance of redox reactions? Their importance lies in the fact that we can use the transfer of electrons between species to do useful work. This is accomplished by constructing a voltaic
CHEMISTRY 13 Electrochemistry Supplementary Problems
1. When the redox equation CHEMISTRY 13 Electrochemistry Supplementary Problems MnO 4 (aq) + H + (aq) + H 3 AsO 3 (aq) Mn 2+ (aq) + H 3 AsO 4 (aq) + H 2 O(l) is properly balanced, the coefficients will
Electrochemical Cells
CH302 LaBrake and Vanden Bout Electrochemical Cells Experimental Observations of Electrochemical Cells 1. Consider the voltaic cell that contains standard Co 2+ /Co and Au 3+ /Au electrodes. The following
ELECTROCHEMISTRY. Electrons are transferred from Al to Cu 2+. We can re write this equation as two separate half reactions:
ELECTROCHEMISTRY A. INTRODUCTION 1. Electrochemistry is the branch of chemistry which is concerned with the conversion of chemical energy to electrical energy, and vice versa. Electrochemical reactions
Redox reactions & electrochemistry
Redox reactions & electrochemistry Electrochemistry Electrical energy ; Chemical energy oxidation/reduction = redox reactions Electrochemistry Zn + Cu 2+ º Zn 2+ + Cu Oxidation-reduction reactions always
When Done Test. Pg. 324 #1-9 Pg. 325 #1-5 Pg. 325 #1-4
When Done Test Pg. 324 #1-9 Pg. 325 #1-5 Pg. 325 #1-4 The Nature of Oxidation- Reduction Reactions I will be able to explain how oxidation and reduction reactions involve the transfer of electrons. I will
Unit 15: Electrochemistry
Unit 15: Electrochemistry Oxidation-Reduction reactions Unit 15.1 Oxidation and Reduction (Redox) Electrons are transferred Spontaneous redox rxns can transfer energy Electrons (electricity) Heat Non-spontaneous
Electrochemistry (Galvanic and Electrolytic Cells) Exchange of energy in chemical cells
Electrochemistry (Galvanic and Electrolytic Cells) Exchange of energy in chemical cells Oxidation loss of electrons (oxidation number increases) OIL RIG Reduction gain of electrons (oxidation number decreases)
Redox and Voltaic Cells
Name: Redox and Voltaic Cells Period: 1. Which half-reaction equation represents the reduction of an iron(ii) ion? 1) Fe 2+ Fe 3+ + e 2) Fe 2+ + 2e Fe 1) 1 to +2 2) 1 to 2 3) Fe 3+ + e Fe 2+ 4) Fe Fe 2+
Chemistry 213. Electrochemistry I
1 Chemistry 213 Electrochemistry I Electrochemical Cells Objective Oxidation/reduction reactions find their most important use in the construction of voltaic cells (chemical batteries). In this experiment,
Ch 20 Electrochemistry: the study of the relationships between electricity and chemical reactions.
Ch 20 Electrochemistry: the study of the relationships between electricity and chemical reactions. In electrochemical reactions, electrons are transferred from one species to another. Learning goals and
Electrochemical Cells
Electrochemistry Electrochemical Cells The Voltaic Cell Electrochemical Cell = device that generates electricity through redox rxns 1 Voltaic (Galvanic) Cell An electrochemical cell that produces an electrical
9.1 Introduction to Oxidation and Reduction
9.1 Introduction to Oxidation and Reduction 9.1.1 - Define oxidation and reduction in terms of electron loss and gain Oxidation The loss of electrons from a substance. This may happen through the gain
Section A: Summary Notes
ELECTROCHEMICAL CELLS 25 AUGUST 2015 Section A: Summary Notes Important definitions: Oxidation: the loss of electrons by a substance during a chemical reaction Reduction: the gain of electrons by a substance
Chemistry 1011 TOPIC TEXT REFERENCE. Electrochemistry. Masterton and Hurley Chapter 18. Chemistry 1011 Slot 5 1
Chemistry 1011 TOPIC Electrochemistry TEXT REFERENCE Masterton and Hurley Chapter 18 Chemistry 1011 Slot 5 1 18.5 Electrolytic Cells YOU ARE EXPECTED TO BE ABLE TO: Construct a labelled diagram to show
Electrochemistry. Electrochemical Process. The Galvanic Cell or Voltaic Cell
Electrochemistry Electrochemical Process The conversion of chemical energy into electrical energy and the conversion of electrical energy into chemical energy are electrochemical process. Recall that an
BATTERIES AND ELECTROLYTIC CELLS. Practical Electrochemistry
BATTERIES AND ELECTROLYTIC CELLS Practical Electrochemistry How Batteries Work One of the most practical applications of spontaneous redox reactions is making batteries. In a battery, a spontaneous electron
11.3. Electrolytic Cells. Electrolysis of Molten Salts. 524 MHR Unit 5 Electrochemistry
11.3 Electrolytic Cells Section Preview/ Specific Expectations In this section, you will identify the components of an electrolytic cell, and describe how they work describe electrolytic cells using oxidation
Chapter 19: Electrochemistry
Chapter 19: Electrochemistry Overview of the Chapter review oxidation-reduction chemistry basics galvanic cells spontaneous chemical reaction generates a voltage set-up of galvanic cell & identification
Electrochemical Cells Homework Unit 11 - Topic 4
Electrochemical Cell Vocabulary Electrochemical Cells Homework Unit 11 - Topic 4 Electrode Anode Voltaic Cell Oxidation Electrolytic Cell Cathode Salt Bridge Reduction Half Reaction Refer to Table J: For
CHAPTER 5 REVIEW. C. CO 2 D. Fe 2 O 3. A. Fe B. CO
CHAPTER 5 REVIEW 1. The following represents the process used to produce iron from iron III oxide: Fe 2 O 3 + 3CO 2Fe + 3CO 2 What is the reducing agent in this process? A. Fe B. CO C. CO 2 D. Fe 2 O 3
Unit 8: Redox and Electrochemistry
May 20, 2014 Unit 8: Redox and Electrochemistry http://www.firefly.org/firefly-pictures.html Oxidation Number numbers assigned to atoms that allow us to keep track of electrons. Rule #1: Oxidation number
Oxidation numbers are used to identify the path of electrons in redox reactions. Each element in the compound must be assigned an oxidation number.
Packet 9: Oxidation-Reduction Reactions Many reactions are oxidation-reduction reactions A.k.a redox Reaction where one atom loses electrons and another atom gains electrons Atoms that lose electrons are
Chapter 19: Redox & Electrochemistry
Chapter 19: Redox & Electrochemistry 1. Oxidation-Reduction Reactions Definitions Oxidation - refers to the of electrons by a molecule, atom or ion Reduction - refers to the of electrons by an molecule,
Electrochemistry objectives
Electrochemistry objectives 1) Understand how a voltaic and electrolytic cell work 2) Be able to tell which substance is being oxidized and reduced and where it is occuring the anode or cathode 3) Students
Page 1 Name: 2Al 3+ (aq) + 3Mg(s) 3Mg 2+ (aq) + 2Al(s) Fe 2 O 3 + 2Al Al 2 O 3 + 2Fe
9666-1 - Page 1 Name: 1) What is the oxidation number of chromium in the chromate ion, CrO 2-4? A) +8 B) +3 C) +2 D) +6 2) What is the oxidation number of sulfur in Na 2 S 2 O 3? A) +6 B) +4 C) +2 D) -1
UNIT 3 ELECTROCHEMISTRY
95414101 UNIT 3 ELECTROCHEMISTRY 1 MARK QUESTIONS Q. 1. Which solution will allow greater conductance of electricity, 1 M NaCl at 93 K or 1 M NaCl at 33 K and why? Ans. 1 M NaCl at 33 K as the ionic mobilities
Electron Transfer Reactions
ELECTROCHEMISTRY 1 Electron Transfer Reactions 2 Electron transfer reactions are oxidation- reduction or redox reactions. Results in the generation of an electric current (electricity) or be caused by
Redox and Voltaic Cells
Name: Redox and Voltaic Cells Period: 1. Which half-reaction equation represents the reduction of an iron(ii) ion? 1) Fe 2+ Fe 3+ + e 2) Fe 2+ + 2e Fe 1) 1 to +2 2) 1 to 2 3) Fe 3+ + e Fe 2+ 4) Fe Fe 2+
Electrochem 1 Electrochemistry Some Key Topics Conduction metallic electrolytic Electrolysis effect and stoichiometry Galvanic cell Electrolytic cell Electromotive Force (potential in volts) Electrode
Lecture Presentation. Chapter 18. Electrochemistry. Sherril Soman Grand Valley State University Pearson Education, Inc.
Lecture Presentation Chapter 18 Electrochemistry Sherril Soman Grand Valley State University Harnessing the Power in Nature The goal of scientific research is to understand nature. Once we understand the
Electrochemistry. Part I: Electrochemical Activity from Chemical Reactions. Part II. Electrochemical activity from cell potentials.
Electrochemistry Introduction: Redox (oxidation-reduction) reactions will be used to determine the relative electrochemical reactivity of 5 metals. In Part I of the experiment, you will determine the activity
Chemistry 102 Chapter 19 OXIDATION-REDUCTION REACTIONS
OXIDATION-REDUCTION REACTIONS Some of the most important reaction in chemistry are oxidation-reduction (redox) reactions. In these reactions, electrons transfer from one reactant to the other. The rusting
SHOCK TO THE SYSTEM! ELECTROCHEMISTRY
SHOCK TO THE SYSTEM! ELECTROCHEMISTRY REVIEW I. Re: Balancing Redox Reactions. A. Every redox reaction requires a substance to be... 1. oxidized (loses electrons). a.k.a. reducing agent 2. reduced (gains
7. Which equation represents an oxidation-reduction reaction?
1. Which polyatomic ion has a charge of 3? 1) chromate ion 2) oxalate ion 3) phosphate ion 4) thiocyanate ion 2. An oxidation-reduction reaction involves the 1) sharing of electrons 2) sharing of protons
Chapter 19: Oxidation - Reduction Reactions
Chapter 19: Oxidation - Reduction Reactions 19-1 Oxidation and Reduction I. Oxidation States A. The oxidation rules (as summarized by Mr. Allan) 1. In compounds, hydrogen has an oxidation # of +1. In compounds,
Electrochemistry. 1. Determine the oxidation states of each element in the following compounds. (Reference: Ex. 4:16) a. N 2 N: b.
Name: Electrochemistry Two of the most common types of chemical reactions are acid-base reactions in which protons are transferred between two reactants and oxidation-reduction reactions in which electrons
Batteries. How does a battery (voltaic cell) work? Time Passes
Why? Batteries How does a battery (voltaic cell) work? When we use portable devices like MP3 players and cell phones we need a ready source of electricity to provide a flow of electrons. Batteries are
We can use chemistry to generate electricity... this is termed a Voltaic (or sometimes) Galvanic Cell
Unit 6 Electrochemistry Chemistry 020, R. R. Martin Electrochemistry Electrochemistry is the study of the interconversion of electrical and chemical energy. We can use chemistry to generate electricity...
Electrochemistry. Chapter 19. Concept Check Concept Check Solution. Solution
Chapter 19 Electrochemistry Concept Check 19.1 If you were to construct a wet cell and decided to replace the salt bridge with a piece of copper wire, would the cell produce sustainable current? Explain
Electrochemistry. A. Na B. Ba C. S D. N E. Al. 2. What is the oxidation state of Xe in XeO 4? A +8 B +6 C +4 D +2 E 0
Electrochemistry 1. Element M reacts with oxygen to from an oxide with the formula MO. When MO is dissolved in water, the resulting solution is basic. Element M is most likely: A. Na B. Ba C. S D. N E.
Lecture 30 Chapter 19, Sections 3-4 Galvanic Cells Electrochemical Potential
Lecture 30 Chapter 19, Sections 3-4 Galvanic Cells Electrochemical Potential Galvanic Cells Defined Standard Hydrogen Electrode Standard Reduction Potentials Redox Balancing One More Example OK, then here
*STUDENT* * STUDENT * Mr. Dolgos Regents Chemistry NOTE PACKET. Unit 10: Electrochemistry (Redox) REDOX NOTEPACKET 1
*STUDENT* * STUDENT * Mr. Dolgos Regents Chemistry NOTE PACKET Unit 10: Electrochemistry (Redox) REDOX NOTEPACKET 1 *STUDENT* * STUDENT * UNIT 10: Electrochemistry (Redox) Redox Reduction Oxidation Reducing
Chapter 20. Electrochemistry
Chapter 20. Electrochemistry 20.1 Oxidation-Reduction Reactions Oxidation-reduction reactions = chemical reactions in which the oxidation state of one or more substance changes (redox reactions). Recall:
Practice Exam Topic 9: Oxidation & Reduction
Name Practice Exam Topic 9: Oxidation & Reduction 1. What are the oxidation numbers of the elements in sulfuric acid, H 2 SO 4? Hydrogen Sulfur Oxygen A. +1 +6 2 B. +1 +4 2 C. +2 +1 +4 D. +2 +6 8 2. Consider
(c) Na is deposited at the cathode (d) Na appears at the anode
year chemiry n0tes new CHAPTER 10 ELECTROCHEMISTRY MCQS Q.1 Electrolysis is the process in which a chemical reaction takes place at the expense of (a) chemical energy (b) electrical energy (c) heat energy
Electrochemical Reactions
1 of 20 4/11/2016 1:00 PM Electrochemical Reactions Electrochemical Reactions Electrical Work From Spontaneous Oxidation- Reduction Reactions Predicting Spontaneous Redox Reactions from the Sign of E Line
Chapter 20 Electrochemistry
Chapter 20 Electrochemistry Learning goals and key skills: Identify oxidation, reduction, oxidizing agent, and reducing agent in a chemical equation Complete and balance redox equations using the method
Unit 12 Redox and Electrochemistry
Unit 12 Redox and Electrochemistry Review of Terminology for Redox Reactions OXIDATION loss of electron(s) by a species; increase in oxidation number. REDUCTION gain of electron(s); decrease in oxidation
AP Chemistry Laboratory #21: Voltaic Cells. Lab day: Monday, April 21, 2014 Lab due: Wednesday, April 23, 2014
AP Chemistry Laboratory #21: Voltaic Cells Lab day: Monday, April 21, 2014 Lab due: Wednesday, April 23, 2014 Goal (list in your lab book): The goal of this lab is to determine what factors affect the
Date Topics Problems Video(s) Due One Review tests, introduce red-ox, identify oxidizing and reducing agents
Chapter 20: Electrochemistry. Tentative Schedule Date Topics Problems Video(s) Due One Review tests, introduce redox, identify oxidizing and reducing agents Oxidation numbers / oxidizing and reducing agents
Ch 11 Practice Problems
Ch 11 Practice Problems 1. How many electrons are transferred in the following reaction? 2Cr 2O 7 2- + 14H + + 6Cl 2Cr 3+ + 3Cl 2 + 7H 2O A) 2 B) 4 C) 6 D) 8 2. Which metal, Al or Ni, could reduce Zn 2+
Introduction to Electrochemical reactions. Schweitzer
Introduction to Electrochemical reactions Schweitzer Electrochemistry Create and or store electricity chemically. Use electricity to drive a reaction that normally would not run. Plating metal onto a metal
18.2 Voltaic Cell. Generating Voltage (Potential) Dr. Fred Omega Garces. Chemistry 201. Miramar College. 1 Voltaic Cell.
18.2 Voltaic Cell Generating Voltage (Potential) Dr. Fred Omega Garces Chemistry 201 Miramar College 1 Voltaic Cell Redox Between If Zn (s) and Cu 2+ (aq) is in the same solution, then the electrons transfer
If a piece of magnesium is placed in an aqueous solution of copper (II) sulfate, the magnesium displaces the copper in a single displacement reaction.
5.3 REDOX Reactions Half-reactions from Full Redox Equations If a piece of magnesium is placed in an aqueous solution of copper (II) sulfate, the magnesium displaces the copper in a single displacement
CHEM N-12 November In the electrolytic production of Al, what mass of Al can be deposited in 2.00 hours by a current of 1.8 A?
CHEM161 014-N-1 November 014 In the electrolytic production of Al, what mass of Al can be deposited in.00 hours by a current of 1.8 A? What products would you expect at the anode and the cathode on electrolysis
Electrochemistry Worksheets
Electrochemistry Worksheets Donald Calbreath, Ph.D. Say Thanks to the Authors Click http://www.ck12.org/saythanks (No sign in required) To access a customizable version of this book, as well as other interactive
17.1 Redox Chemistry Revisited
Chapter Outline 17.1 Redox Chemistry Revisited 17.2 Electrochemical Cells 17.3 Standard Potentials 17.4 Chemical Energy and Electrical Work 17.5 A Reference Point: The Standard Hydrogen Electrode 17.6
Practice Test Redox. Page 1
1. What is the oxidation state of nitrogen in the compound NH4Br? (1) 1 (2) +2 (3) 3 (4) +4 2. What is the oxidation number of sulfur in Na2S2O3? (1) 1 (2) +2 (3) +6 (4) +4 3. During which process does
Redox Reactions and Electrochemistry
Redox Reactions and Electrochemistry Redox Reactions and Electrochemistry Redox Reactions (19.1) Galvanic Cells (19.2) Standard Reduction Potentials (19.3) Thermodynamics of Redox Reactions (19.4) The
A voltaic cell using the following reaction is in operation: 2 Ag + (lm) + Cd(s) 2 Ag(s) + Cd 2+ (l M)
0. Cu (s) + 2Ag + Cu 2+ + 2Ag (s) If the equilibrium constant for the reaction above is 3.7x10 15, which of the following correctly describes the standard voltage, E o and the standard free energy change,
A Study of Electrochemistry Prelab
1. What is the purpose of this experiment? A Study of Electrochemistry Prelab 2. a. Calculate the standard cell potential of a cell constructed from Mg 2+ /Mg and Ni 2+ /Ni (Table I). Which is the anode
Electrochemical cells. Section 21.1
Electrochemical cells Section 21.1 Electrochemical processes Chemical process either release energy or absorb energy This does not have to be solely heat or light - sometimes it can be in the form of electricity
Practice Packet: Oxidation Reduction. Regents Chemistry: Mrs. Mintz. Practice Packet. Chapter 14: Oxidation Reduction & Electrochemistry
Practice Packet: Oxidation Reduction Regents Chemistry: Mrs. Mintz Practice Packet Chapter 14: Oxidation Reduction & Electrochemistry 1 Assigning Oxidation Numbers Objective: How do we assign atoms the
Name 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
AP Questions: Electrochemistry
AP Questions: Electrochemistry I 2 + 2 S 2O 2-3 2 I - + S 4O 2-6 How many moles of I 2 was produced during the electrolysis? The hydrogen gas produced at the cathode during the electrolysis was collected
Electrochemistry. (Hebden Unit 5 ) Electrochemistry Hebden Unit 5
(Hebden Unit 5 ) is the study of the interchange of chemical energy and electrical energy. 2 1 We will cover the following topics: Review oxidation states and assigning oxidation numbers Redox Half-reactions
Suppose, we want to measure the standard electrode potential for zinc electrode, then we construct the cell according to the following cell diagram
Standard Electrode Potential The galvanic cell has two electrode potentials; anode potential and cathode potential When the cell potential is measured with voltmeter, it gives the difference of both potentials
Lecture 27 Chapter 19, Sections 3-4 Galvanic Cells Electrochemical Potential
Lecture 27 Chapter 19, Sections 3-4 Galvanic Cells Electrochemical Potential Galvanic Cells Defined Standard Hydrogen Electrode Standard Reduction Potentials Redox Balancing One More Example This time
5.7 Galvanic Cells. Electrochemical Gizmos
5.7 Galvanic Cells Have you ever accidentally bitten into a piece of aluminum foil? If you have silver amalgam fillings, you may have experienced a bit of a jolt (Figure 1). The aluminium, in contact with
Ch 18 Electrochemistry OIL-RIG Reactions
Ch 18 Electrochemistry OIL-RIG Reactions Alessandro Volta s Invention Modified by Dr. Cheng-Yu Lai Daily Electrochemistry Appliactions Electrochemistry: The area of chemistry that examines the transformations
Name: Regents Chemistry Date:
Name: Date: 1. The reaction CuO + CO CO 2 + Cu is an example of (A) reduction, only (B) oxidation, only (C) both oxidation and reduction (D) neither oxidation nor reduction 6. In which compound does chlorine
Types of Cells Chemical transformations to produce electricity- Galvanic cell or Voltaic cell (battery)
Electrochemistry Some Key Topics Conduction metallic electrolytic Electrolysis effect and stoichiometry Galvanic cell Electrolytic cell Electromotive Force Electrode Potentials Gibbs Free Energy Gibbs
Chapter 20. Electrochemistry Recommendation: Review Sec. 4.4 (oxidation-reduction reactions) in your textbook
Chapter 20. Electrochemistry Recommendation: Review Sec. 4.4 (oxidation-reduction reactions) in your textbook 20.1 Oxidation-Reduction Reactions Oxidation-reduction reactions = chemical reactions in which