Chemistry 3a spring 2009
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Chemistry 3A Spring 2009. Brett Williams Lecture: TTh 6:00am-6:55 pm in: Cunn 301 Lab: TTh 7:00 pm-9:55 pm in: Cunn 301. I can be reached by:. E-mail: [email protected] E-mail: [email protected] Course Info. Lectures Problem sets Assigned homework Quizzes

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Chemistry 3A Spring 2009

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Chemistry 3a spring 2009

Chemistry 3ASpring 2009

Brett Williams

Lecture: TTh 6:00am-6:55 pm

in: Cunn 301

Lab: TTh 7:00 pm-9:55 pm

in: Cunn 301


I can be reached by

I can be reached by:

  • E-mail: [email protected]

  • E-mail: [email protected]


Course info

Course Info

  • Lectures

  • Problem sets

  • Assigned homework

  • Quizzes

  • Lab exercises

  • Lab experiments

  • Worksheets

  • 4 Exams and 1 Final Exam


Lecture

Lecture

  • Presented on computer overheads

  • Lecture notes are available

    • By downloading files (go to Adj. Faculty Site): www.deltacollege.edu/emp/bwilliams

    • Not required, but recommended

  • Lecture notes complement the textbook/assignments but attendance is essential to get all of the information you need


Problem sets

Problem Sets

  • Usually succeed the lecture

  • Several practice problems associated with the current lecture topic

  • These handouts will be covered in class

  • Problems are to assist you with homework assignments

  • Not collected or graded

  • Answers will be given or posted during the lab period


Homework

Homework

  • Assigned for each chapter

  • Problems are placed throughout the chapter

  • All odd numbered answers are placed at the end of the chapter

  • Not collected or graded

  • Not mandatory, but if you don’t do the HW (most likely) it will affect your performance on the quizzes


Quizzes

Quizzes

  • Five Chapter Quizzes

    • 20 pts each

    • No make-ups

  • Based on the homework assignments for that chapter

  • 20-30 minutes long

  • Given during the first hour

  • The best 4 of 5chapter quizzes are used in your total score

  • Two Name and Formula Quizzes for Chapter 5


Other lab assignments

Other Lab Assignments

  • Lab Exercises

    • Most will originate from your laboratory textbook

    • All exercises aregraded assignments

  • Worksheets

    • To be completed during lab period

    • A review to prepare for exams


Experiments

Experiments

  • 10 experiments

    • 20 Points Each

    • Labs are due in one week (i.e., If the lab is done in class on Monday, the lab report is due the following Monday)

    • 60 % rule: Must meet this minimum score in lab to pass the course. No exceptions

    • The best 9 of 10 expt’s are used in your total score


Exams

Exams

  • Four Exams

    • Based on the chapters which are listed in the syllabus

    • 100 points each

    • All exams count in total score

    • Time: 2 hours to complete


Final exam

Final Exam

  • Thursday, May 21st, 4 PM

  • 2 Hours

  • Cumulative Exam

  • 200 points


Grading scale

Grading Scale

(Based on 1000 possible points)

90.0 - 100 %A

75.0 - 89.9 %B

60.0 - 74.9 %C

50.0 - 59.9%D

< 50.0 %F


Required materials

Required Materials

  • Textbook:Basic Chemistry, 2nd ed. by Timberlake & Timberlake

  • Laboratory Manual:Foundations of Chemistry in the Laboratory, 12th ed. by M. Hein, et al

  • Calculator

  • Safety Goggles & Lock


Laboratory policy

Laboratory Policy

  • No one may participate in lab wearing open toe / heel shoes. Watch what you wear on lab days. If you have inappropriate attire, you will NOT be allowed to complete the lab

  • Goggles must be worn during all lab experiments

  • Your attendance will be monitored


Chapter 1

Chapter 1

Chemistry In

Our Lives


Chemistry and chemicals

Chemistry and Chemicals

  • Chemistry

    • The study of the properties and the behavior of matter

    • Composition, structure, and reactions

  • All things around you are composed of matter

  • Chemistry occurs around you everyday and affects everything you use and do.

  • It helps us to understand our world and how it works


Chemistry and chemicals1

Chemistry and Chemicals

  • Chemical processes occur in nature and happen around you all of the time

  • Chemistry (reactions) occurs when

    • food is cooked or baked

    • chlorine is added to a pool

    • batteries are used in a flashlight/radio

    • salt is added to sidewalks and roads

    • bleach is added to laundry


Chemical processes

Chemical Processes

  • In nature

    • fermentation by microbes which converts sugars to alcohols

    • photosynthesis by plants to convert sunlight energy into chemical energy

    • leaves changing color due to the interaction of different pigments


Chemical processes1

Chemical Processes

  • In laboratories and in manufacturing

    • gasoline refining (distillation)

    • development of synthetic fibers (nylon, dacron)

    • new pharmaceuticals (design and synthesis)

    • water purification (water softening)

    • agriculture/food production (pesticides, fungicides, herbicides)


Chemistry and chemicals2

Chemistry and Chemicals

  • Everything around you is composed of chemicals

  • A chemical is a material used or produced in a chemical process (laboratory, manufacturing or natural).

  • A substance is a chemical that consists of one type of matter

    • It consists of two or more bound elements in a fixed ratio

    • Same composition and properties throughout

  • Substances that were developed by chemists are in use everyday

    • Soaps, toothpaste, lotion, clothing


Scientific disciplines

Scientific Disciplines

  • Science is the study in which humans attempt to explain knowledge about themselves and their surroundings

    • Facts are organized and explained, in a systematic and logical manner

  • It is an attempt to understand (better) how nature works

    • Through observation of physical evidence (phenomena)

    • Experiments to simulate events under controlled conditions


Scientific discipline

Scientific Discipline

  • Science covers an enormous range of accumulated information which is divided into branches called scientific disciplines

  • Chemistry is one of the branches of science (botany, geology, physics, zoology)


Scientific method

Scientific Method

  • Most scientific and technological advances are through the use of experimentation as a method of problem-solving

  • In general, no two scientist will approach a problem exactly in the same manner

  • There are guidelines for the practice of science to achieve systematic experimentation: The Scientific Method

    • Scientific Method: A set of procedures (steps) used to acquire knowledge and explain an observable fact


Scientific method1

Scientific Method

The scientific method process (steps):

  • Observations: Identify the problem and plan procedures to obtain information

    • Collect Data: Observe, describe, and take measurements (data)

    • Organize data to find patterns in the information

  • Once sufficient data is collected, form a hypothesis

    • A hypothesis is a possible model or statement that offers an explanation for the observations


Hypothesis theory law

Hypothesis, Theory, Law

  • Experiments: A well-defined, controlled procedure to obtain information

    • To validate the hypothesis perform more experiments

    • If an experiment is performed under exactly the same conditions, the same results (facts) should occur

    • If results are different than predicted, modify or propose a new hypothesis

  • Theory

    • A hypothesis that has been tested and validated over a long period of time

    • Hypothesis evolves to theory if experiments are repeated and confirm the hypothesis


Hypothesis theory law1

Hypothesis, Theory, Law

  • If after extensive testing the reliability of a hypothesis become very high, it will evolve to a theory

  • A theory allows a scientist to predict the outcome of proposed experiments

  • If results of future experiments conflict with the current theory it must either be modified, restated, or even replaced


Hypothesis theory law2

Hypothesis, Theory, Law

  • After determining what facts are known about a selected problem, more experimentation is performed to obtain more information

  • More facts are obtained. Look for repeating patterns among the collected facts

  • If a large number of facts are tied together, it can eventually lead to a single generalized statement

  • Law: A concise, verbal statement that summarizes facts about a natural phenomena


Using the scientific method

Using the Scientific Method

In Summary:

  • Identify the problem and plan procedures to obtain information

  • Collect data through observation and experimentation

    • Qualitative: Do not involve a number

    • Quantitative: Involve measurements

  • Analyze and organize the data to summarize observations (form generalizations)

  • Suggest probable explanations (form a hypothesis)

  • Experiment further to prove or disprove the proposed explanations


Benefits to studying chemistry

Benefits to Studying Chemistry

  • To further understand our world and its impact on our daily living (health care, natural resources, environmental protection, food supply)

  • Provides insight into other areas of modern science and technology

  • Learn Problem-Solving Skills

    • The ability to solve complicated chemistry problems can be applied to other types of problem-solving

  • Help you develop a systematic approach to scientific thought (logical, analytical)

    • Enhances your ability to predict future events based on patterns of behavior


Learning chemistry

Learning Chemistry

  • Learn the terms (vocabulary)

    • Some memorization is required

  • Use Active Learning: Read the text, attend lecture and practice “problem solving”

  • Problem solving will include study checks, sample problems, and questions and problems

  • Class: Problem sets, exercises


Learning chemistry1

Learning Chemistry

  • Develop your own study plan

    • Do the recommended problems

    • Your confidence and problem solving skills are enhanced through repetition

    • Don’t expect to “get it” the first time you

      see it

    • Read the text, come to class

    • Ask questions


Homework1

Homework

  • “Sample problems”

    1.1 and 1.2

    “Study checks, succeed all sample problems”

  • “Questions and Problems”

    1.11, 1.13, 1.17

  • “Understanding the Concepts”

    1.19, 1.21

  • “Additional Questions and Problems”

    1.23, 1.25, 1.27

  • “Challenge Questions”

    1.29


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