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General Chemistry

Fall 2012

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Chemistry: The Central Science

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General Chemistry Syllabus

A study of Matter - Atomic and Electronic structure Chemical bonding Chemical reactions

Chemical energy Kinetics and Equilibrium

Meetings (5 credit hours) Check your my courses tab

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Dr. Dan DeLaCruz Contact Information

Email ddelacruz@semo.edu Office in RH 201 Office hours Mon. Tue. Fri. - 12:00 pm - 1:00 pm Office Phone 573-651-2162

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General Chemistry

Website learning.semo.edu

Class Textbook Chemistry Atoms First 2012

by Burdge and Overby Cheating

Any student caught cheating (as defined in the studenthandbook) will be given an F for the class

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General Chemistry Grade Scale

4 hour exams (100 pts each) 400 ptsFinal exam 200 ptsLaboratory 200 ptsHomework 100 ptsQuizzes 100 ptsTotal number of points possible: 1000 pts

Final grades will be assigned as follows: 90.0 100.0% A 80.0 89.9% B 70.0 79.9 % C 60.0 69.9 % D

0

59.9 % F

A laboratory grade of at least 50% is required for a grade of C or greater.

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General Chemistry Laboratory

Purpose of lab is to reinforce concepts learned inlecture with hands on experimentation

Print out handouts from CH185 website beforecoming to class

Attend lab for which you are registered Need goggles, proper clothing and shoes

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General Chemistry Weekly Tasks

Homework covering the weeks chapter due by 8:00AM on Wednesday .

Quiz covering the weeks chapter will held every Friday of each week.

NO HOMEWORK OR QUIZZES THIS FIRST WEEK For your online homework http://saplinglearning.com During

sign up, and throughout the term, if you have any technicalproblems or grading issues, send an email tosupport@saplinglearning.com

Each student will be allowed TWO quiz drops . Any missedquizzes will count towards a drop. Any missed quizzes afterthat are worth 0

Any missed homework assignments CAN NOTbe made up

http://saplinglearning.com/http://saplinglearning.com/

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General Chemistry Recitation

Purpose of recitation is to review material covered inlecture

Will focus on problems similar to exam problems Group work to complete a worksheet Exams will be held in recitation

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Success in General Chemistry

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Unit 1 - Matter

Atomic and Electronic Structure

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Definition of Chemistry:

A simple definition of chemistry is: the study of matter and the changes itundergoes.

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Physical States of Matter

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Pure Substances and Mixtures

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Separation of Mixtures

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Physical and Chemical Properties of Matter

http://my-blackberry.net/wallpapers/11/m/Melting_Ice_Cube.jpg

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DOT Placards

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Measurement of Matter

Measurement definitions are different betweencountries and in time

Length 1 foot = Length of King Henry I foot in ~1100 AD

1 inch = 1/12 of 1 foot or length of three kernels of barley

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International System of Units (SI)

1 meter = Length of the path travelled by light in a vacuum in 1/299792458 of a second1 second = the duration of 9,192,631,770 periods of the radiation corresponding to the transitionbetween the two hyperfine levels of the ground state of the caesium 133 atom1 kelvin = the fraction 1/273.16 of the thermodynamic temperature of the triple point of water1 mol = the amount of substance of a system which contains as manyelementary entities as there are atoms in 0.012 kilogram of carbon 12

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Measurement units commonlyused in Chemistry

Quantity Name of unit Symbol

length meter m

mass gram g

time second S

temperature Celsius C

amount mole mol

volume milliliter mL

density gram/milliliter g/mL

Memorize this list

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Prefixes in Metric System

Memorize this list and meanings

Prefix symbol

Tera- T

Giga- G

Mega- M

Kilo- k

Deci- d

centi- c

milli- m

micro- mnano- n

pico p

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Dimensional Analysis

Dimensional analysis uses ____________ _________to change one unit into another.1000 mm = 1 m1 kg = 1000 g10 6 mL = 1 L

How many mm are in 34.2 m?

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Dimensional Analysis

How many yards are in 34.2 m?

1.0936 yd = 1 m3 ft = 1 yd

12 in = 1 ft2.54 cm = 1 in100 cm = 1 m

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Dimensional Analysis

How many seconds are in 2.44 yr?

365 days = 1 yr24 hr = 1 day60 min = 1 hr60 s = 1 min

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The average speed of a nitrogen molecule in air at 25Cis 515 m/s. Convert this speed to miles per hour.(Given 1 mile = 1.6093 km)

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Temperature Conversions:

K = C + 273.15F = 9/5( C) + 32C = 5/9( F 32)

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If a weather forecaster predicts that the temperature forthe day will reach 31C, what is the predicted

temperature (a) in K, (b) in F?

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Volume

Definition:

A _________ is a cube 1dm long on each side.

A __________ is a cube 1

cm long on each side. 1000 mL = 1 L

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Dimensional Analysis

How many mL are in 30.1 L?

1000 mL = 1 L

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Dimensional Analysis

How many L are in 5.0 gal?

3.7854 L = 1 gal

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Dimensional Analysis

How many cm 3 are in 0.43 L?

1000 mL = 1 L1 cm 3 = 1 mL

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Density:

Physical property of a substance

density can change with _________________

md

V

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(a) Calculate the density of mercury if 1.00 10 2 goccupies a volume of 7.36 cm 3.

(b) Calculate the volume of 65.0 g of the liquidmethanol (wood alcohol) if its density is 0.791 g/mL.

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Measurement uncertainty and exact numbers

Defined values

Counting

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Scientific Notation and Calculators

Convert 3.4 x 10 5 ms to s.

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Significant Figures

1. 534

2. 504

3. 0.023

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Significant Figures

4. 74.300

5. 230,000

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How many significant figures are in each of thefollowing measurements: (a) 3.549 mol, (b) 203 10 4 cm, (c) 0.00134 m 3, (d) 92.10 oC, (e) 6530 kg?

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Significant Figures in Calculations

Multiplication or division

Area = (6.221 cm)(5.2 cm) =

1m6.221cm

100cm

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C h f ll i i d h

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Carry out the following operations and express theanswer with the appropriate number of significant

figuresa. 15.3 cm x 6.1 cm x 8.112 cm =

b. 674.1 g 501 g =

c. (0.0045 x 20000.0) + (2813 x 12)