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© 2015 Pearson Education, Inc. Chemistry: The Central Science, 13th Edition Brown/LeMay/Bursten/Murphy/Woodward/Stoltzfus Solution Analyze We are given.

are oxidized and reduced, and indicate which is the oxidizing agent and which is the reducing agent. Sample Exercise 20.1 Identifying Oxidizing and Reducing Agents © 2015 Pearson Education, Inc. Chemistry: The Central Science, 13th Edition Brown/LeMay/Bursten/Murphy/Woodward/Stoltzfus Comment A common mnemonic for remembering oxidation and reduction is “LEO the lion says GER”: losing electrons is oxidation; gaining electrons is reduction. Practice Exercise 1 What is the reducing agent in/


Chapter 5: Introduction to Reactions in Aqueous Solutions

CO(g) → 2 Fe(l) + 3 CO2(g) D Fe3+ is reduced to metallic iron. CO(g) is oxidized to carbon dioxide. General Chemistry: Chapter 5 Prentice-Hall © 2002 Oxidation and Reduction O.S. of some element increases in the reaction. Electrons are on the right of the equation Reduction O.S. of some element decreases in the reaction. Electrons are on the left of the equation. General/


Metals. Metallurgy the extraction of metals from ores  by reduction (less reactive metals)  by electrolysis of melt (reactive metals) the preparation.

floatation Roasting converting sulphide ore to oxide 2ZnS (s) + 3O 2(g) -----> 2ZnO (s) + 2SO 2(g) 2CuS (s) + 3O 2(g) -----> 2CuO (s) + 2SO 2(g) 3FeS 2(s) + 8O 2(g) -----> Fe 3 O 4(s) + 6SO 2(g) Manufacture of Iron and Steel Chemistry of blast furnace Chemistry of basic oxygen furnace Chemistry of blast furnace iron reduction raw materials Several Blast Furnaces/


Pulping and Bleaching PSE 476

Pulping and Bleaching PSE 476 Lecture #3 Mechanical Pulp Bleaching Agenda Mechanical pulp bleaching overview Reductive bleaching Chemistry Effect of variables Oxidative bleaching Mechanical Pulp Bleaching After the refining process, / acid, or DTPA, diethylenetetraaminepentaacetic acid Sodium silicate increases brightness, more better but if is too much it will form buildups in closed water loops , 3% common, silicate stabilize peroxide, act as a buffer, form complexes together with the transition metals/


Chemistry 125: Lecture 67 April 12, 2010 Oxidizing/Reducing Alcohols Grignard Reactions Green Chemistry This For copyright notice see final page of this.

Oxidizing/Reducing Alcohols Grignard Reactions Green Chemistry This For copyright notice see final page of this file (Loudon) Alcohol Oxidation (sec. 16.14) Stopping at Aldehyde (p. 805-6) Vicinal Diol Cleavage by IO 4 - (sec. 16.14b) Pyridinium Chlorochromate (Cl-CrO 2 O - ) “In/ for nucleophilic substitution 5 votes Reduction of amides without hydride reagents 4 votes Oxidation/Epoxidation methods without the use of chlorinated solvents 4 votes Safer and more environmentally friendly Mitsunobu reactions 3/


Chemistry: An Introduction to General, Organic, and Biological Chemistry, Twelfth Edition© 2015 Pearson Education, Inc. 12.4 Reactions of Alcohols, Thiols,

of Alcohols Alcohols undergo dehydration when heated with an acid catalyst the loss of —H and —OH from adjacent carbon atoms, producing an alkene and water H +, heat + H 2 O alcohol alkene Chemistry: An Introduction to General, Organic, and Biological Chemistry, Twelfth Edition© 2015 Pearson Education, Inc. Oxidation and Reduction In organic chemistry, oxidation reactions increase the number of carbon–oxygen bonds by the addition of oxygen or a loss/


6-1 Nuclear Forensics Summer School Radiochemical separations and quantification Aqueous chemical behavior of key radionuclides §Oxidation state variation.

PaO(SO 4 ) 3 6-36 6-37 Solution chemistry Redox behavior §Reduction in Zn amalgam §Electrochemistry methods àPt-H 2 electrode àAcidic solution àPolarographic methods *One wave ØV to IV §Calculation of divalent redox Pa(IV) solution §Oxidized by air §Rate decreases in absence of O 2 and complexing ions 6-38 Solution chemistry Pa(IV) §Precipitates in acidic solutions ài.e., HF Spectroscopy §6d 1  5f/


Balance the redox equation: General Procedure

electrochemical cell at 25 °C. (The equation is balanced.) Solution Begin by separating the reaction into oxidation and reduction half-reactions. (In this case, you can readily see that Al(s) is oxidized. In cases where it is not so apparent, you many want to assign oxidation states to determine the correct half-reactions.) Example 18.4 Calculating Standard Potentials for Electrochemical Cells from Standard Electrode Potentials/


Chapter 4 Chemical Quantities and Aqueous Reactions 2008, Prentice Hall Chemistry: A Molecular Approach, 1 st Ed. Nivaldo Tro Roy Kennedy Massachusetts.

conversion of free elements into ions 4 Na(s) + O 2 (g) → 2 Na + 2 O – (s) 2 Na(s) + Cl 2 (g) → 2 Na + Cl – (s) Tro, Chemistry: A Molecular Approach89 Oxidation and Reduction in order to convert a free element into an ion, the atoms must gain or lose electrons of course, if one atom loses electrons, another must accept them reactions where/


Chapter 4 Chemical Quantities and Aqueous Reactions 2008, Prentice Hall Chemistry: A Molecular Approach, 1 st Ed. Nivaldo Tro Roy Kennedy Massachusetts.

conversion of free elements into ions 4 Na(s) + O 2 (g) → 2 Na + 2 O – (s) 2 Na(s) + Cl 2 (g) → 2 Na + Cl – (s) Tro, Chemistry: A Molecular Approach70 Oxidation and Reduction in order to convert a free element into an ion, the atoms must gain or lose electrons of course, if one atom loses electrons, another must accept them reactions where/


Chemistry: An Introduction to General, Organic, and Biological Chemistry, Twelfth Edition© 2015 Pearson Education, Inc. 13.5 Chemical Properties of Monosaccharides.

adjacent hydroxyl that can be oxidized Chemistry: An Introduction to General, Organic, and Biological Chemistry, Twelfth Edition© 2015 Pearson Education, Inc. Oxidation: Fructose to Glucose Fructose, a ketohexose, rearranges to form glucose and is then oxidized in Benedict’s. Chemistry: An Introduction to General, Organic, and Biological Chemistry, Twelfth Edition© 2015 Pearson Education, Inc. Reduction of Monosaccharides The reduction of the carbonyl group in monosaccharides produces sugar alcohols, which/


Copyright ©2009 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Chemistry: The Central Science, Eleventh Edition By.

Ni atom decreases in oxidation state as NiO 2 is converted into Ni(OH) 2. Thus, NiO 2 is reduced (gains electrons) and therefore serves as the oxidizing agent. Comment: A common mnemonic for remembering oxidation and reduction is “LEO the lion says GER”: losing electrons is oxidation; gaining electrons is reduction. Copyright ©2009 by Pearson Education, Inc. Upper Saddle River, New Jersey 07458 All rights reserved. Chemistry: The Central/


Department of Chemistry CHEM1010 General Chemistry *********************************************** Instructor: Dr. Hong Zhang Foster Hall, Room 221 Tel:

the AgBr unexposed to get the negative Then, light will be pass through the negative to induce reaction on a light-sensitive paper to obtain the pictures. Chapter 8. (L31)-Oxidation and Reduction Antioxidants..In food chemistry, certain reducing agents are called antioxidants. Example: ascorbic acid (Vitamin C) is used to react with oxygen to avoid its reaction with food Browning of apples/


Department of Chemistry CHEM1010 General Chemistry *********************************************** Instructor: Dr. Hong Zhang Foster Hall, Room 221 Tel:

: Dr. Hong Zhang Foster Hall, Room 221 Tel: 931-6325 Email: hzhang@tntech.edu CHEM1010/General Chemistry _________________________________________ Chapter 8. (L30)-Oxidation and Reduction Today’s Outline..Review of three views of oxidation and reduction..Oxidants and reductants..Oxygen and oxidizing agents (oxidants) Oxygen Other common oxidants Chapter 8. (L30)-Oxidation and Reduction Oxidants and reductants Oxidation and reduction happen together (they are coupled). Example: CuO + H 2 = Cu + H 2 O Cu: +2/


ISOE ・ ATC 2006 ALARA Symposium 1 Approach of Hitachi for Dose Rate Reduction October 12, 2006 Hitachi, Ltd.

Dose rate reduction Apply water chemistry control, low Co content material, decontamination and shielding In recent year, occupational exposure in Japan is in the highest level in the world. ☆ Suppressing of Number of worker and working time Apply remote or automatic machine Review frequency and item of/. Crud RW Fe,Ni ions FeFe Co 2+ Co 2+ ・ Oxide film is mainly composed of Fe based oxides. Cr contained film is not formed in this case. ・ In this case, as supply of Fe component is abundant compared with /


Introduction to Oxidation and Reduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. IB Chemistry Text.

Introduction to Oxidation and Reduction Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display. IB Chemistry Text Green and Damji TEXT 9.1 & 9.2 Types of Chemical Reactions ? type of reaction ? 1.Mg (s/2 0 0 Disproportionation Reaction Cl 2 + 2 OH - ClO - + Cl - + H 2 O Element is simultaneously oxidized and reduced. Types of Oxidation-Reduction Reactions Chlorine Chemistry 0 +1 4.4 Chemistry in Action: Metals from the Sea Redox or not? CaCO 3 (s) CaO (s) + CO 2 (g) Mg(OH/


Chemistry An Introduction to General, Organic, and Biological Chemistry, Eleventh Edition Copyright © 2012 by Pearson Education, Inc. Chapter 5 Chemical.

Copyright © 2012 by Pearson Education, Inc. OxidationReduction In an oxidationreduction reaction, electrons are transferred from one substance to another. 99 Chemistry An Introduction to General, Organic, and Biological Chemistry, Eleventh Edition Copyright © 2012 by Pearson Education, Inc. OxidationReduction ReducedOxidized 100 Chemistry An Introduction to General, Organic, and Biological Chemistry, Eleventh Edition Copyright © 2012 by Pearson Education, Inc. Oxidation and Reduction 2Cu(s) + O 2 (g/


Electrochemistry Experiment 12. OxidationReduction Reactions Consider the reaction of Copper wire and AgNO 3 (aq) AgNO 3 (aq) Ag(s) Cu(s)

require an electric current the conversion between chemical energy and electrical energy is carried out in an electrochemical cell spontaneous redox reactions take place in a voltaic cell – aka galvanic cells nonspontaneous redox reactions can be made to occur in an electrolytic cell by the addition of electrical energy Tro, Chemistry: A Molecular Approach11 Electrochemical Cells oxidation and reduction reactions kept separate – half-cells electron flow through a/


© 2012 Pearson Education, Inc. Chemistry, The Central Science, 12th Edition Theodore L. Brown; H. Eugene LeMay, Jr.; Bruce E. Bursten; Catherine J. Murphy;

.0  10  14. Thus, [H + ] is very small in this basic solution. (See Section 16.3) © 2012 Pearson Education, Inc. Chemistry, The Central Science, 12th Edition Theodore L. Brown; H. Eugene LeMay, Jr.; Bruce E. Bursten; Catherine J. Murphy; and Patrick Woodward Continued Practice Exercise Complete and balance the following equations for oxidation-reduction reactions that occur in basic solution: (a)NO 2  (aq) + Al(s)  NH/


Chapter 14 Oxidation-Reduction Reactions Malone and Dolter - Basic Concepts of Chemistry 9e2 Setting the Stage – Electron Flow The flow of electrons.

- + H 2 O + ClO -  Cl - + 2 OH - Half equation for the reduction of hypochlorite to chloride in alkaline solution Malone and Dolter - Basic Concepts of Chemistry 9e31 Spontaneous Redox Reactions A spontaneous reaction occurs between the stronger oxidizing agent and the stronger reducing agent to form weaker oxidizing and reducing agents. By testing reactions between pairs of atoms and molecules, we can determine a relative order of strength of/


Copyright©2000 by Houghton Mifflin Company. All rights reserved. 1 Chemistry FIFTH EDITION by Steven S. Zumdahl University of Illinois.

©2000 by Houghton Mifflin Company. All rights reserved. 2 Chemistry FIFTH EDITION Chapter 4 Types of Chemical Reactions and Solution Stoichiometry Don’t forget Homework!!!! Copyright©2000 by Houghton Mifflin Company. All rights reserved. 3 Section 4.9 OxidationReduction Reactions Reactions in which one or more electrons are transferred. Also called Redox Reactions Oxidation States (Oxidation Numbers): Arbitrary numbers assigned to atoms to provide a way/


Electrochemistry AP Chemistry. During oxidation-reduction (redox) reactions, the oxidation states of two substances change. oxidation = reduction = loss.

Electrochemistry AP Chemistry During oxidation-reduction (redox) reactions, the oxidation states of two substances change. oxidation = reduction = loss of e – gain of e – both occur in redox LEO: “GER…” “OIL RIG.” Oxidation is loss; reduction is gain. Losing electrons: oxidation. Gaining electrons: reduction. Oxidation-Reduction Reactions oxidizing agent (oxidant): is reduced (or has a component that is reduced) reducing agent (reductant): is oxidized (or has a component that is oxidized) e.g., Zn(s) + 2 H /


II.Matter and Energy A.Principles of chemistryPrinciples of chemistry B.WaterWater C.Organic compoundsOrganic compounds D.EnergyEnergy II. Matter & Energy.

more reduced atoms often have a larger amount of potential chemical energy (in an oxygen atmosphere) II. Matter & Energy A. Principles of Chemistry B. Water C. Organic Compounds D. Energy 1. Types of energy 2. Oxidation and reduction 3. Electrical generationMatter & EnergyPrinciples of ChemistryWaterOrganic CompoundsEnergyTypes of energyOxidation and reductionElectrical generation D. 2.Oxidation and Reduction Oxidation reaction –A reaction in which an atom loses electrons –By becoming bonded to a more/


Chapter 4 Chemical Quantities and Aqueous Reactions 2008, Prentice Hall Chemistry: A Molecular Approach, 1 st Ed. Nivaldo Tro.

conversion of free elements into ions 4 Na(s) + O 2 (g) → 2 Na + 2 O – (s) 2 Na(s) + Cl 2 (g) → 2 Na + Cl – (s) Tro, Chemistry: A Molecular Approach89 Oxidation and Reduction in order to convert a free element into an ion, the atoms must gain or lose electrons of course, if one atom loses electrons, another must accept them reactions where/


1-1 Chemistry 121, Winter 2012, LA Tech Introduction to Organic Chemistry and Biochemistry Instructor Dr. Upali Siriwardane (Ph.D. Ohio State) E-mail:

Nomenclature for Ketones 15.5 Isomerism for Aldehydes and Ketones 15.6 Selected Common Aldehydes and Ketones 15.7 Physical Properties of Aldehydes and Ketones 15.8 Preparation of Aldehydes and Ketones 15.9 Oxidation and Reduction of Aldehydes and Ketones 15.10 Reaction of Aldehydes and Ketones with Alcohols 1-4 Chemistry 121, Winter 2012, LA Tech Carbonyl Group 1-5 Chemistry 121, Winter 2012, LA Tech Structure the functional/


按一下以編輯母片標題樣式 New Way Chemistry for Hong Kong A-Level Book 3A1 1 Carbonyl Compounds and Nucleophilic Addition.

. O 3 2. Zn dust / H 2 O 按一下以編輯母片標題樣式 New Way Chemistry for Hong Kong A-Level Book 3A32 Reactions of Aldehydes and Ketones A.Nucleophilic Addition Reactions (Ad N ) B.Condensation Reactions (Addition-Elimination) C.Iodoform Reactions (Oxidation) D.Oxidation Reactions E.Reduction Reactions 按一下以編輯母片標題樣式 New Way Chemistry for Hong Kong A-Level Book 3A33 Bonding in the Carbonyl Group The carbonyl carbon atom is sp 2 -hybridized/


Chemical Quantities and Aqueous Solution. Titration often in the lab, a solution’s concentration is determined by reacting it with another material and.

conversion of free elements into ions 4 Na(s) + O 2 (g) → 2 Na + 2 O – (s) 2 Na(s) + Cl 2 (g) → 2 Na + Cl – (s) Tro, Chemistry: A Molecular Approach14 Oxidation and Reduction in order to convert a free element into an ion, the atoms must gain or lose electrons of course, if one atom loses electrons, another must accept them reactions where/


Engineering Chemistry (revised edition) ISBN: 978-81-265-4475-2 Copyright©2014 Wiley India Pvt. Ltd. All Rights Reserved.

. Ltd. All Rights Reserved Galvanic Cells The cell consists of two half-cells. Oxidation takes place in one half-cell and reduction in the other as indicated by the half-reactions Engineering Chemistry (revised edition) ISBN: 978-81-265-4475-2 Copyright©2014 Wiley India Pvt. Ltd. All Rights Reserved Salt Bridge Engineering Chemistry (revised edition) ISBN: 978-81-265-4475-2 Copyright©2014 Wiley India Pvt/


Prentice-Hall © 2002General Chemistry: Chapter 5Slide 1 of 43 Chapter 5: Introduction to Reactions in Aqueous Solutions Philip Dutton University of Windsor,

)  3+2- 2+2- 4+2- 0 Assign oxidation states: CO(g) is oxidized to carbon dioxide. Fe 3+ is reduced to metallic iron. Prentice-Hall © 2002General Chemistry: Chapter 5Slide 24 of 43 Oxidation and Reduction Oxidation –O.S. of some element increases in the reaction. –Electrons are on the right of the equation Reduction –O.S. of some element decreases in the reaction. –Electrons are on the left of/


IGCSE CHEMISTRY SECTION 2 LESSON 4. Content The iGCSE Chemistry course Section 1 Principles of Chemistry Section 2 Chemistry of the Elements Section 3.

Oxidation and Reduction Understand oxidation and reduction as the addition and removal of oxidation respectively Oxidation and Reduction Understand oxidation and reduction as the addition and removal of oxidation respectively Oxidation may be defined in three ways: 1.Oxidation is the addition of oxygen to a substance 2.Oxidation is the removal of hydrogen from a substance 3.Oxidation is the loss of electrons from a substance Oxidation and Reduction Understand oxidation and reduction as the addition and/


Oxidation-Reduction Alexander Darmanin, Marcus Pabian & Lyn Cheah.

hydrogen can be used to identify oxidation and reduction. 9. In all chemical equations the change in the charges of polyatomic species can be used to identify oxidation and reduction. 10. Oxidation and reduction processes can occur independently. Think What best describes an oxidation? What best describes a reduction? “Not all redox reactions involve oxygen, but all oxidation and reduction reactions involve transfer of electrons between substances” - Chemistry and chemical reactivity (6 th edition) – first/


Chapter 4 Chemical Quantities and Aqueous Reactions 2008, Prentice Hall Chemistry: A Molecular Approach, 1 st Ed. Nivaldo Tro Roy Kennedy Massachusetts.

conversion of free elements into ions 4 Na(s) + O 2 (g) → 2 Na + 2 O – (s) 2 Na(s) + Cl 2 (g) → 2 Na + Cl – (s) Tro, Chemistry: A Molecular Approach89 Oxidation and Reduction in order to convert a free element into an ion, the atoms must gain or lose electrons of course, if one atom loses electrons, another must accept them reactions where/


Oxidation-Reduction Titrations PHARMACEUTICAL ANALYTICAL CHEMISTRY PHC 213 1.

3+ (Gain of electrons: Reduction) In every redox reaction, both reduction and oxidation must occur. Substance that gives electrons is the reducing agent or reductant. Substance that accepts electrons is the oxidizing agent or oxidant. Reaction of ferrous ion with ceric ion Overall, the number of electrons lost in the oxidation half reaction must equal the number gained in the reduction half equation. PHARMACEUTICAL ANALYTICAL CHEMISTRY PHC 213 4 Oxidation Number (O.N)  The/


Prentice-Hall © 2007 General Chemistry: Chapter 5 Slide 1 of 47 Philip Dutton University of Windsor, Canada Prentice-Hall © 2007 CHEMISTRY Ninth Edition.

O 3 (s) + 2 Al(s)  Al 2 O 3 (s) + 2 Fe(l) Prentice-Hall © 2007 General Chemistry: Chapter 5 Slide 28 of 47 Oxidation and ReductionOxidation  O.S. of some element increases in the reaction.  Electrons are on the right of the equation  Reduction  O.S. of some element decreases in the reaction.  Electrons are on the left of the equation. Prentice-Hall © 2007 General/


Electrochemistry. I. Electrochemistry: the branch of chemistry dealing with electricity and redox reactions a) Definition: the branch of chemistry dealing.

reactive is the anode and the other is the cathode Zn = anode Cu = cathode 2. Writing the reaction that occurs at each cell. (An Ox Red Cat) Anode is oxidation – Metal  Ion Zn  Zn +2 + 2e Cathode is reduction - Ion in solution  Atom Cu/ the migration of ions and completes the circuit Electrochemical Cell Working http://www.mhhe.com/physsci/chemistry/essentialchemistry/flash/flash.mhtml Using The Cell Below Answer The Following Questions 1. Which is the cathode and anode ? Mg = anode and Ag = cathode 2./


Chemistry: An Introduction to General, Organic, and Biological Chemistry, Twelfth Edition© 2015 Pearson Education, Inc. 7.1 The Mole A counting term states.

of O atoms formic acid  The intermediate products are toxic, causing headaches and possible death because they interfere with key reactions in cells. Chemistry: An Introduction to General, Organic, and Biological Chemistry, Twelfth Edition© 2015 Pearson Education, Inc. Characteristics of OxidationReduction The particular definition of oxidation and reduction depends on the process that occurs in the reaction. Oxidation always involves a loss of electrons, may also be seen as an addition/


General, Organic, and Biological Chemistry: Structures of Life, 5/e Karen C. Timberlake © 2016 Pearson Education, Inc Oxidation and Reduction of.

, Inc. 14.3 Oxidation and Reduction of Aldehydes and Ketones In Tollens’ test, a “silver mirror” forms when the oxidation of an aldehyde reduces silver ions to metallic silver. The silvery surface of a mirror is formed in a similar way. Learning Goal Draw the condensed or line-angle structural formulas for the reactants and products in the oxidation or reduction of aldehydes and ketones. General, Organic, and Biological Chemistry: Structures of Life, 5/


Chemical Reactions in Aqueous Solutions

at Figure 4.12 on p. 145. Applications of Oxidation and Reduction Everyday life: to clean (bleach) our clothes, sanitize our swimming pools (“chlorine”), and to whiten teeth (peroxide). In foods and nutrition: redox reactions “burn” the foods we eat; antioxidants react with undesirable free radicals. In industry: to produce iron, steel, other metals, and consumer goods. Oxidation and Reduction in Organic Chemistry Potassium dichromate Initially the solution turns the orange of Cr2O72/


Milady Standard Cosmetology

. All Rights Reserved “The greater the difficulty, the more glory in surmounting it “The greater the difficulty, the more glory in surmounting it. Skillful pilots gain their reputation from storms and tempests” Epictetus Objectives Explain the difference between organic and inorganic chemistry Discuss the different forms of matter: elements, compounds, and mixtures Explain pH and the pH scale Describe oxidation and reduction (redox) reactions LEARNING MOTIVATION (WHY?) As a professional/


1 Secondary 4 Chemistry Extraction of Aluminium via electrolysis JT 2009 Raffles Programme.

Chemistry Extraction of Aluminium via electrolysis JT 2009 Raffles Programme 2 Bauxite is mined Extraction of Aluminium purified by treating with NaOH (Al 2 O 3 is amphoteric and reacts with NaOH) High m.p. : 2045 o C Used as the electrolyte  aluminium Bauxite comprises: Al 2 O 3 - aluminium oxide Fe 2 O 3 - iron(III) oxide/ 950 o C (this means a great cost reduction!) Al 2 O 3 - aluminium oxide (or alumina) 3 Electrolysis 3. electrolyte: Al 2 O 3 dissolved in cryolite 4. steel tank Overall equation: 4Al 3/


Carbonyl chemistry -Production of carbonyl compounds

Carbonyl chemistry -Production of carbonyl compounds -Oxidation and Reduction reactions -Further oxidation reactions. Formation of carbonyl compounds Starting with an alcohol, react with an oxidising agent (such as acidified potassium dichromate) Propan-1-ol + [O]  Propanal +water The carbonyl functional group PLANAR WITH BOND ANGLES OF 120° ORBITAL OVERLAP NEW ORBITAL The bond is polar due to the difference in electronegativity. Aldehydes vs. Ketones Aldehydes have the/


Lecture 6: Uranium Chemistry

of UCl3 in water Reduction of U(IV) or (VI) at Hg cathode Evaluated by color change U(III) is green Very few studies of U(III) in solution No structural information Comparisons with trivalent actinides and lanthanides Uranium solution chemistry Tetravalent uranium Forms in very strong acid Requires >0.5 M acid to prevent hydrolysis Electrolysis of U(VI) solutions Complexation can drive oxidation Coordination studied/


1 Introduction Chemical reactions involve the rearrangement of the atoms within and between molecules that results in the formation of new molecules. This.

allows us to describe chemical reactions using chemical equations 2 Introduction If you need to review how to create and balance chemical equation, take a look at Section 6.1 in Raymond. We will focus on some reactions that are important in biological chemistry, including: Oxidation/Reduction reactions Oxidation/Reduction reactions Reactions involving water Reactions involving water We will also look at the different forms of free energy/


Spontaneity of Redox Reactions How is related to other thermodynamic quantities such as  G  and K. In an electrochemical cell, chemical energy is converted.

cell is called concentration cell. Two zinc electrodes in two different aq. Solution of zinc sulphate. Eg 1.0M and 0.1M There fore reduction occur in 1.0M compartment and oxidation occur in 0.1M compartment. The cell diagram Chang, R.(2002). Chemistry 7th ed.Mc graw Hill. bkk And the half-reactions are Oxidation: Zn(s) → Zn 2+ (0.10M) +2e - Reduction: Zn 2+ (1.0M) +2e - → Zn(s/


H+H+ H+H+ H+H+ OH - New Way Chemistry for Hong Kong A-Level Book 2 1 Chapter 20 Redox Equilibrium II: Electrochemical Cells 20.1Electrode Potentials 20.2Half.

absolute electrode potentials (separation of charges) developed at the surface of the electrodes. reduction oxidation M(s) M n+ (aq) + ne - Depend on: 20.1 Electrode Potentials (SB p.186) Nature of electrodes & soln; temp and pressure ; Conc. of ions in soln H+H+ H+H+ H+H+ OH - New Way Chemistry for Hong Kong A-Level Book 2 4 20.2 Half Cells (SB/


CHEMISTRY 161 Oxidation-Reduction Reactions Chapter 6.

CHEMISTRY 161 Oxidation-Reduction Reactions Chapter 6 REVISION HCl(aq) + NaOH(aq) → NaCl(aq) + H 2 O(l) H + (aq) + OH - (aq) → H 2 O(l) (Arrhenius) HCl(aq) + NH 3 (aq) → NH 4 Cl(aq) H + (aq) + NH 3 (aq) → NH 4 + (aq) (Bronsted) CHEMICAL REACTIONS a) precipitation reactions b) acid-base reactions (proton transfer) c) oxidation-reduction reactions (electron transfer) (redox reactions) 1. oxidation/s) 4. disproportionation reactions an element in one oxidation state is oxidized and reduced at the same time H 2 /


Homogeneous Hydrogen Transfer Chemistry Professor Steve Marsden.

 Chiral amine (below right) – key intermediate in GSK’s Vestipitant (anxiolytic, anti-emetic)  Imine reduction route:  Ketone reduction route: CATHy examples  Diltiazem – blockbuster anti-hypertensive  Currently made by classical resolution of racemic intermediate  CATHy: enantioselective synthesis by Dynamic Kinetic Resolution WASTE CATHy examples  DKR: 2. Oxidation chemistryOxidation: loss of hydrogen (M w = 2)  Frequently requires ‘heavy’ and undesirable reagents – hazards, waste  Example/


Oxidation-Reduction Reactions” LEO SAYS GER Pre-AP Chemistry Charles Page High School Stephen L. Cotton.

” LEO SAYS GER Pre-AP Chemistry Charles Page High School Stephen L. Cotton Oxidation and Reduction (Redox) A process called “reduction” is the opposite of oxidation, and originally meant the loss of oxygen from a compound Oxidation and reduction always occur simultaneously The substance gaining oxygen (or losing electrons) is oxidized, while the substance losing oxygen (or gaining electrons) is reduced. Oxidation and Reduction (Redox) Today, many of these reactions may not even involve/


Chemistry: An Introduction to General, Organic, and Biological Chemistry, Eleventh Edition Copyright © 2012 by Pearson Education, Inc. Chapter 12 Organic.

Education, Inc. Oxidation and Reduction In an oxidation, there is an increase in the number of C–O bonds there is a loss of H In a reduction, there is a decrease in the number of C–O bonds there is a gain of H 7 Chemistry: An Introduction to General, Organic, and Biological Chemistry, Eleventh Edition Copyright © 2012 by Pearson Education, Inc. Oxidation and Reduction 8 Chemistry: An Introduction to General, Organic, and Biological Chemistry, Eleventh Edition/


Extracting Metals Prior Learning; a) Understand what happens to carbonates when they are heated b) Know that an ore contain a metal mixed with rock c)

. Metals that are less reactive than carbon can be extracted from their oxides by reduction in carbon, for example iron oxide is reduced in the blast furnace to make iron. Identify that metals less reactive than carbon can be extracted by reducing their oxides. Explain that iron is extracted in a blast furnace. •Consider and evaluate the social, economic and environmental impacts of exploiting metal ores, of using metals/


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