Questions On Oxidation-Reduction Reactions

Submitted By ktmzach199
Words: 539
Pages: 3
Open Document
*Redox Reactions
*Oxidation Numbers

*Unit 3 Lecture 2

Oxidation-Reduction Reactions
 Aka

Redox Rxns

 Chemical

rxns that transfer electrons (e-)



OXIDATION – the LOSS of e-’s



REDUCTION – the GAIN of e-’s

LEO the lion goes GER
Loss of Electrons = Oxidation
Gain of Electrons = Reduction

*Example 1
*A single piece of iron (II) is immersed in a solution of copper
(II) sulfate.

* This is a single replacement reaction…
Fe (s) + CuSO4 (aq)  FeSO4 (aq) + Cu (s)
Make a net ionic equation….
Fe (s) + Cu+2 (aq) + SO42- (aq)  Fe+2 (aq) + SO42- (aq)
+ Cu (s)
Fe (s) + Cu+2 (aq)  Fe+2 (aq) + Cu (s)
Now you can figure out what has been oxidized and reduced…

*Iron is oxidized
*Copper is reduced

*What about this reaction?
*How can you tell what gets oxidized and reduced?

*You must assign oxidation numbers!

*Oxidation # Rules
*Yes, you must memorize these… page
137

Oxidation #’s
• We must know the oxidation # of each element involved to fully understand redox rxns.
• Charges work a lot of the time, but oxidation #’s work EVERY time.

Rules for Assigning Oxidation
Numbers (O#)
1. The oxidation # of an atom of an element is zero.



Example 1  Fe = 0
Example 2  O2 = 0

2. The O# of a monatomic ion is equal to the charge on the ion.



Example 3  Ca+2 = +2
Example 4  H+ = +1

Rules for Assigning Oxidation
Numbers (O#)
3. Fluorine (most EN) is always -1!!!!!
4. The O# of oxygen is always -2 EXCEPT:



in peroxides, HxOy,  Oxygen’s O# = -1 when bonded to fluorine  Oxygen’s O# = +2

5. The O# of hydrogen is +1 EXCEPT when bonded to:
5. alkali metals (1A Group but not H)
6. alkaline earth metals (2A Group)
7. Al.

Rules for Assigning Oxidation
Numbers (O#)
6. The O# of the more electronegative (EN) atom in a molecule is the same as the charge it would have if it were a monatomic ion.
 Hint 1: Molecules = covalent compounds…
(they start with and only have nonmetals) without charges ANYWHERE.
 Hint 2: The closer to _F_, the more electronegative ▫ Example 5  PbS  S= -2

Rules for Assigning Oxidation
Numbers (O#)
7. Alkali metals, alkaline earth
Show More

Related Documents: Questions On Oxidation-Reduction Reactions

Dept Of Accounting And Corporate Governance

ACCG924 Taxation Law S2 Day 2014 Dept of Accounting & Corporate Governance Contents General Information 2 Learning Outcomes 3 Assessment Tasks 3 Delivery and Resources 6 Unit Schedule 8 Policies and Procedures 11 Graduate Capabilities 14 Changes from Previous Offering 15 Research and Practice 15 Disclaimer Macquarie University has taken all reasonable measures to ensure the information in this publication is accurate and up-to-date.…

Words 3595 - Pages 15

Outline: Law and Lecture Essay

PERTH INSTITUTE OF BUSINESS & TECHNOLOGY LAW1100D – LEGAL FRAMEWORK UNIT OUTLINE – TRIMESTER 2, 2013 DESCRIPTION: Welcome to Legal Framework. This unit serves as an introduction to important themes relevant to the legal framework of business – that is, the structure of laws within which business decisions are made. Included in the unit are discussions on historical legal issues, the institutions in the Australian legal system, the jurisdiction of the major courts and tribunals in…

Words 2818 - Pages 12

Essay about Marketing: Assessment Task

AFF2631 Financial management Unit Guide Semester 1, 2012 The information contained in this unit guide is correct at time of publication. The University has the right to change any of the elements contained in this document at any time. Last updated: 23 Jan 2012 Table of Contents AFF2631 Financial management - Semester 1, 2012.............................................................................1 Mode of Delivery..............................................................…

Words 3456 - Pages 14

Study Guide Essay

of Science Unit Guide S1 Day Session 1, North Ryde, Day 2013 Table of Content Table of Content General Information Convenor and teaching staff Credit Points Prerequisites Corequisites Co-badged status Unit Description 2 3 3 3 3 3 3 3 Learning Outcomes Assessment Tasks Weekly Exercises Assignment One Assignment Two Assignment Three Final Examination 4 5 5 5 5 5 6 Unit Schedule Delivery and Resources CLASSES REQUIRED AND RECOMMENDED TEXTS AND/OR MATERIALS UNIT WEBPAGE AND TECHNOLOGY…

Words 3550 - Pages 15

Essay on Observational Atomic Structure Notes

PG 1 of 2 Observational Atomic Structure [KEY] Analytical Chemistry Department of Science, Honors Chemistry | Spring Chapter 4 Section 2 Review Essential Questions & Answers: [ ] 1. Who suggested the ideology of atoms? 4th century B.C Greek Democritus of Abdera [ ] 2. What was the conclusion, in reference to the concept of atoms, Democritus proposed? Atoms were indivisible, indestructible, fundamental units of matter. [ ] 3. What did Democritus’ proposals lack in explanatory reasoning? Why? They…

Words 756 - Pages 4

Essay on Assessment Task

ACC1030 Introduction to financial accounting Unit Guide Semester 2, 2014 Copyright © Monash University 2014. All rights reserved. Except as provided in the Copyright Act 1968, this work may not be reproduced in any form without the written permission of the host Faculty and School/Department. The information contained in this unit guide is correct at time of publication. The University has the right to change any of the elements contained in this document at any time. Last updated: 04 Jul 2014…

Words 3725 - Pages 15

Essay on Exam Sample

BFA103 Accounting & Financial Decision Making (SOU) Semester 5, 2012 Examination Information for ORDINARY, DEFERRED AND SUPPLEMENTARY EXAMINATIONS Time Allowed: THREE (3) hours + 15 minutes reading time (you are permitted to write during reading time) Instructions: 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. There are SIX (6) questions to be marked out of a total 100 marks. Some questions have more than one part. Answer ALL questions. You may answer the questions in any…

Words 837 - Pages 4

Essay about ACCT7107 Lecture 3 OH Allocation And Refinement Complete 6perpage

ACCT7107 ACCT7107 MANAGEMENT ACCOUNTING AND CONTROL Lecture 3 REFLECTION ACTIVITY Custom Design Pty Ltd makes custom-order curtains and soft furnishings . In June 2013 when managers prepared the budget for the 2014 year, they estimated Mfg Oh would total $100,000. As the process is labour intensive, OH is allocated to jobs based on DLH and 400,0000 total DLH were expected. During September and October 2013, employees worked on only 3 jobs. Relevant information for each follows: Monthly data Cost…

Words 5516 - Pages 23

Essay on Example: Management Accounting and Costs

ACCT7107 ACCT7107 MANAGEMENT ACCOUNTING AND CONTROL DISCUSS BRIDGETON INDUSTRIES ACF AND THE CASE APPROACH Background Identify/define the problems and issues  Analysis to support the problems and issues you have identified   Lecture 4: Cost system refinement II: Activity-based costing; Process Costing Quantitative? Qualitative?    Recommendations: Alternative actions/recommendations that come out of your analysis and what is your preferred action plan?…

Words 4635 - Pages 19

Media Theory 1: Developing Argument?

C UNIT: Media Theory 1: Developing Argument Semester 1 Framework Unit Guide Media Production Undergraduate Framework BA (Hons) / Dip HE / Cert HE Digital Media Design BA (Hons) / Dip HE / Cert HE Media Production BA (Hons) / Dip HE / Cert HE Scriptwriting for Film and Television BA (Hons) / Dip HE / Cert HE Radio BA (Hons) / Dip HE / Cert HE Television Production September 2014 (Version 1.4) Contents Developing Arguments: Overview of the Unit 1. Introduction to the Unit…

Words 7241 - Pages 29