Announcements Wednesday, December 5 FINAL When: Tuesday, December 11, 5:30 - 7:30 Where: in our usual room. YOU WILL NEED A PHOTO I.D. (SUCH AS DRIVER'S.

Slides:

Advertisements

Similar presentations

Oxidation-Reduction Oxidation literally means to react with oxygen. Oxidation literally means to react with oxygen. Example:2Mg + O 2 2MgO Example:2Mg.

Advertisements

Oxidation-reduction reactions

Chemistry 20.1.

Recap Precipitation Reactions: ions combine to form insoluble products Neutralization Reactions: H + ions and OH - ions combine to form H 2 O Next: Oxidation-Reduction.

Balancing Redox Equations Iron (Fe) rusts (is oxidized) when it reacts with oxygen (O 2 ) in the air. 2Fe + 3O 2  Fe 2 O 3 [iron(III) oxide] A new iron.

Aim: What are oxidation and reduction? Do Now: 1.Sketch the structure of an atom. Label the subatomic particles. 2.Describe the relative masses and charges.

Outline:3/30/07 Today: Start Chapter 19  Redox reactions  Balancing redox reactions è Pick up Exam 2 – from me è Pick up CAPA 17 - outside è Seminar.

Oxidation/Reduction & Batteries. Oxidation Combining with Oxygen – combustion Gives off energy Oxidation in the body – H 2 O and CO 2 Oxidation in an.

Unit 10. Oxidation-Reduction Chemistry Recommended Problems

The City of New Orleans Kamden Dulesky 5 th Grade.

Chapter 10 Chemical Reactions. 2 Homework for Chap 10 Read p 273 – 286; Applying the Concepts # 1 – 37, 39 – 42, 44 – 47,

Chapter 10 Chemical Reactions. 2 Homework for Chap 10 Read p 251 – 263; Applying the Concepts # 1 – 34, 36 – 39, 43 – 44,

ELECTROCHEMISTRY. What is Electrochemistry?  NaCl + AgBr   Na + CaCl 2   In which reaction to do elements change charges? How could this happen?

Oxidation and Reduction. Historically.... Oxidation was defined as the addition of oxygen to a substance Eg. when coal was burned C + O 2 CO 2 or the.

20.1 Oxidation/Reduction (REDOX)

Electrochemistry-Corrosion Corrosion. Involves oxidation of metal; often returning them to their natural state (oxides or ores) Happens because the oxidation.

What Causes It and What Prevents It ?.  Corrosion is an electrochemical reaction.  The corrosion of metals is an example of an oxidation-reduction reaction,

Announcements. 10 Electron Transfer Reactions* Oxidation & reduction (revisited) Today’s lecture is brought to you by the number… 2 Geez….almost all reactions.

Electrochemistry. Electrochemical Cells  Electrons are transferred between the particles being oxidized and reduced  Two types –Spontaneous = Voltaic.

 II^B ITI  ITIS “Faravelli”  Stradella (PV) Proff. C. Merli  K. Maculotti 

Unit 6 Oxidation/Reduction and Electrochemistry

Chapter 20 Oxidation – Reduction Reactions. What are they? A family of reactions that are concerned with the transfer of electrons between species Redox.

Corrosion Formation of Oxides. Corrosion: The chemical reaction which occurs between a metal and oxygen which results in the formation of a new substance.

Redox Reactions Or How Batteries Work REDOX Reactions The simultaneous transfer of electrons between chemical species. – Actually 2 different reactions.

“Redox” REVIEW GAME.

CHEMISTRY World of Zumdahl Zumdahl DeCoste. Copyright© by Houghton Mifflin Company. All rights reserved. Chapter 18 Oxidation-Reduction Reactions and.

Announcements Tuesday, May 3 FINAL When: Tuesday, May 10, 7:30 – 9:30 Where: in our usual room. BRING YOUR 5” x 7” card with notes. BRING “problem” exams.

Balancing Redox Reactions Chem 12. Application of oxidation numbers: Oxidation = an increase in oxidation number Reduction = a decrease in oxidation number.

Electrochemistry Oxidation Numbers Redox Reactions Oxidizing & Reducing Agents.

1 Chapter 19 Oxidation and Reduction (basic facts) A substance is oxidized if it loses electrons (becomes more positive) A substance is reduced if it gains.

Chapter 20 – Oxidation and Reduction Oxidation-Reduction reactions called redox reactions.

Redox Reactions. REDOX-OXIDATION STATES Day One.

Oxidation-Reduction Reactions Ch. 16. What is Oxidation? Oxygen is most abundant element on Earth Extremely reactive due to strong electronegativity Oxidation.

REDOX electrochemistry. Spontaneous redox reactions can transfer energy –Electrons (electricity) –Heat Non-spontaneous redox reactions can be made to.

Oxidation-Reduction Reactions Part 1 Notes 11 Beginning Unit 4.

Redox & Electrochemistry What’s the point ? Electrical production (batteries, fuel cells) REDOX reactions are important in … Purifying metals (e.g. Al,

Oxidation Is often thought of as a combination with oxygen( rusting burning) 2H 2(g) + O 2(g) ----> 2H 2 O (g) CH 4 (g) + 2O > 2H 2 O(g) + CO 2.

Monday, April 14, Chapter 17 Quiz 2. Notes Section 18.1 – Oxidation-Reduction 3. Homework – Reading Analysis – Section 18.1.

Oxidation-Reduction Dr. Ron Rusay Fall 2001 © Copyright 2001 R.J. Rusay.

Redox Reactions Reactants: Zn + I 2 Product: Zn I 2.

4Na + O 2  2Na 2 O How many grams of Sodium Oxide can be produced from 25g of Sodium? 25 g Na 1 mole 23.0g 23.0g =1.08 mole Na 2Na 2 O 2Na 2 O 4 Na.

REDOX REACTIONS 1: Oxidation and reaction.

Oxidation Reduction.

Are you feeling the reduction-oxidation? 2Cr + 3SN 4+  2CR Sn 2+ Gained 2 e- Lost 3 e-

Chapter 8. Another common type of reaction is called Oxidation-Reduction or abbreviated as REDOX Oxidation – Reaction in which a substance loses electrons.

The Meaning of Oxidation Reduction Reactions that take place in the presence of oxygen usually involve a process called oxidation. – In oxidation reactions,

Write and balance the equation and identify the reaction type for each of the following reactions: Potassium metal reacts with chlorine gas Zn metal reacts.

Electrochemistry Lesson 1 Introduction. Electrochemistry: the conversion of chemical energy into electrical energy and vice versa. (the study of reactions.

Electrochemistry Lesson 1 Introduction. Electrochemistry Is the study of reactions that gain or lose electrons.

Warmup 2/23/16 What is an oxidizer again? Oxidizers are usually very reactive. Why do you think this is? Objective Tonight’s Homework To learn how to identify.

 I can identify elements vs. compounds in a chemical equation  I can name the 7 diatomic elements  I can identify precipitation vs. redox reactions.

Chapter 21 - Oxidation-Reduction Reactions 2: 38.40/49 = 78.37% 3: 40.36/49 = 82.37%

OXIDATION – REDUCTION REACTIONS Chapter 19. Summarize the oxidation and reduction process ( including oxidizing and reducing agents.

REDOX reactions Oxidation and Reduction. Redox chemistry The study of oxidation and reduction reactions Oxidation and reduction reactions involve the.

Oxidation-Reduction Dr. Ron Rusay Spring 2008.

The membrane keeps the chlorine gas away

Types of Reactions.

Better known as REDOX Lesson 1

Unit 7: Redox & Electrochemistry

Better known as REDOX Lesson 1

Electrochemistry.

Corrosion of Metals Susan Xu Iris Ye.

Also called Reduction-Oxidation Reactions

Electro-chemistry CHAPTER 15

Chemistry 20.1.

“Redox” is the combination of the two words Lesson 1

Displacement reactions

Balancing Redox Reactions

Oxidation and Reduction, Displacement and Rusting.

Electrochemistry Lesson 1 Introduction.

Presentation transcript:

Announcements Wednesday, December 5 FINAL When: Tuesday, December 11, 5:30 - 7:30 Where: in our usual room. YOU WILL NEED A PHOTO I.D. (SUCH AS DRIVER'S LICENSE OR LSU STUDENT IDENTIFICATION CARD) BRING YOUR ONE-PAGE SET OF NOTES. BRING “problem” exams (misgraded, etc.) HELP SESSIONS: Sunday 5 pm Williams 202 Monday 4 pm Choppin Lobby Monday 5 pm Williams 202 JUST DROP IN FOR HELP!!!! I HAVE NOT SEEN MANY ???’S ON THE PRP’S!!!

RedOx ReductionOxidation Lose oxygenGain oxygen Gain hydrogenLose hydrogen Gain electronsLose electrons

A sample case 2Na + 2H 2 O  2Na + + H 2 + 2OH - Na was oxidized: Na  Na + + e - (electron lost) H was reduced: lost oxygen O no change: lost H but gained e - Remember…we actually ran this reaction by dumping some sodium into water.

Another one 2 CH 3 OH  2 CH 2 O + H 2 C: ??? H: ??? O: ???

Still another one (related to “butter vs. margarine”) CH 3 CH 2 CH 2 CH=CHCH 2 CH 3 + H 2  CH 3 CH 2 CH 2 CH-CHCH 2 CH 3 HH C ????? H ?????

Secret Agents: all part of the semantics nightmare that is RedOx Something that promotes reduction: reducing agent Example: K, Na, H, LiAlH 4 Something that promotes oxidation: oxidizing agent Example, O, F, Br, K 2 Cr 2 O 7

Main Applications of RedOx Recovery of metals from ores Corrosion Prevention of corrosion Batteries

And the sons of Pullman porters & the sons of engineers Ride their fathers' magic carpet made of steel Mothers with their babes asleep, rockin' to the gentle beat And the rhythm of the rails is all they feel City of New Orleans— Steve Goodman Steel!

Reducing Iron Ore to Make Steel: from rust to riches 2 Fe 2 O 3 + 3C  4 Fe + 3CO 2 Rust From coal

RedOx & Geography COAL IRON ORE CARS

Electro-reduction for Aluminum 2Al 2 O 3  4Al + 3O 2 Electrons out Electrons in Power Plant

Hydroelectric Power Hydroelectric Power Aircraft Industry

Why do we recycle aluminum?

Corrosion 2 Fe  2 Fe e - 2H 2 O + 4e - + O 2  4OH - Electrons travel down nail

Batteries!