welcome to chemistry 7 welcome to chemistry 7!€¦ · 14/6/2012 · 65.5-72.4 c 59.5-65.4 d 83.3

Welcome to Chemistry 7

Dr. Richard Gross

Ateneo de Manila UniversityDepartment of Chemistry

Chemistry 7

Welcome to the chamber Dr. Richard Gross

Ateneo de Manila University

1Thursday, June 14, 2012

Instructor Dr. Richard Gross

Office C115 Schmitt Hall (Local 5633)

Phone Chem Department (Local 5620)

Hours T/Th 9:00 - 10:00 AM

E-mail [email protected]

Course Website

www.chemistry7.wordpress.com

Welcome to Chemistry 7!


Please refer to the course blog daily!

www.chemistry7.wordpress.com


Textbook For Chemistry 7

Text: Principles of General Chemistry. 2nd Edition by Martin Silberberg (McGraw-Hill)

OR

Chemistry, The Molecular Nature of Matter and Change, 4th Edition by Martin Silberberg (McGraw-Hill).


Materials For Chemistry 7

Prerequisite: Math 11 or Math 18a

Calculator: a non-programmable, non-graphing calculator. Cell phone or PDA calculators can not be used.

Notebooks: one for class notesa separate one for problem sets:


• 3-one hour departmental exams (100 pts each)

• 1-comprehensive final (200 points)

• 10 unannounced quizzes + homework. (10 points each = 100 points total)

• Final Exam: Multiple-choice (200 pts)

How Your Grade Will Be Determined

• Hour Exam Format: Multiple-choice + 2 long questions


Earned Points To Letter Grade

% Points Grade90.5-100.

0A

85.5-90.4 B+79.5-85.4 B72.5-79.4 C+65.5-72.4 C59.5-65.4 D

<59.4 F

Comprehensive Final 200600TOTAL POINTS

Juan Dela Cruz

500 pts total 500/600=>83.3 => B

% of 600 Total Points determines letter grade


TENTATIVE Exam Schedule

Event Date Points

Exam 1 July 20/27 100 pts

Exam 2 August 23/24 100 pts

Exam 3 Sept 27/28 100 pts

Quizzes (10) Announced 100 pts

Final Exam October 6-10 200 pts

TOTAL PTS 600 pts


Mandatory Recitation

Department has arranged a recitation class to help students.

Could someone please ask me: “why are you making us do this?”

This class really helps!

Need to Beadles to find our common day and time.


Rules and Guidelines

• Be courteous & arrive to class on time.

• Unexcused absences will prohibit you from turning in homework, taking a quiz/exam.

• Cellular phones open laptops are forbidden

• Prepare for class & complete reading assignments before lecture

• Attend class-----you get 9 “cuts” or a W

!See you student handbook for details


ATTENDANCE

You are expected to attend all classes. 9 cuts and you get a W.

Zero’s are awarded for unexcused absences during quizzes & exams

Excused absences include illness, death in family, serious illness in the family. Need to let me or the Dept Secretary know before the exam---not after. No exceptions!


Rules and Guidelines

• You will be called on in class--please be prepared

• Academic honesty is a requirement.

• Please stop by and see me in my office!

• If you have a disability please see me ASAP.


Two Class Beadles Please

• University decrees that a class

representative be appointed:

!Assist in class recitation set up.

!Disseminate course information

!Handout-Collect Class Materials

!Report Faculty Absences

• Any volunteers?


How well you do in Chem 7 will depend on the work you can do between classes.

First 6 weeks are crucial must learn!

Read, understand and do the assigned problems! Key to the class.

Make pals, friends and study in groups.

See me for help, see me for help, see me for help, see me for help, see me for ....

Don’t fall behind!

Don’t fall behind!


Assignment 1

• Buy textbook, calculator and notebooks

• Go to: chemistry7.wordpress.com

!download, read and understand the syllabus

! familiarize yourself with the website

• Read Chapter 1

!start working assigned problems (see blog)

• Index card with current picture and name in big letters!


I’m from rural Upstate New York, have lived in the Philippine for 15 years, own a chemical company, and teach part-time at the Ateneo.

1995 Ph.D Chemistry Syracuse University, NY

1992-1995: Biological Components Corporation

1995-1997: Timex Corporation

1997-present: Chemical business owner


The Gross Family ~2007

Kaylee

Karla

Abbey

Rick


The Gross Family April 2012

Kaylee

Karla

Abbey

Rick


Rick’s Interests and Hobbies


Chemistry is the study of matter and its transformation.


Matter is anything that has mass and volume---just about everything under the sun.


BIOCHEMISTRY

ORGANICCHEMISTRY

ANALYTICALCHEMISTRY

PHYSICALCHEMISTRY

INORGANICCHEMISTRY

GENERALCHEMISTRY

Study carbon chemistry.

Theoretical physical basis of chemistry

Chemistry of living things.

Chemical analysis, protocols, standards,

instrumentation

Study all non-carbon based

chemistry.


Auto Air Bags-Chemistry

Air bag sensor generates a rapid electric current generating heat which decomposes sodium azide to nitrogen gas in microseconds.

300˚C2 NaN3 => 2Na + 3N210 Na + 2 KNO3 => K2O + 5Na20 + N2K2O + Na2O + SiO2 => sodium silicate


Chemistry explains many things that we take for granted everyday.

Wetting or Not Wetting

Surface Tension

ViscosityBoiling and Freezing Point

capillary action


Chemists like Rick make money by making and selling “Sizing agents” which impart water resistance in white and brown paper, and improve printing properties.

SIZED BOND PAPER UNSIZED BOND PAPER

What is happening here?


Dr. Roseland Franklin

This rather plan but symmetric looking X-ray diffracation image taken by Roseland Franklin led Watson-Crick to determine that DNA is a double-helix.


Intermolecular forces hold together the double helix of DNA.


How can I learn chemistry?

Learn the lingo


CovalentMolecule

Ionic Compound

that are either

which is

ChemicallyUnited ElementsAtomic

Numberin

PeriodicTable

which are unique atoms represented by

Symbol

Heterogeneous Mixture

which is either

Homogeneous Mixture

Compound

is either

Element chemicalprocess

physicalprocess

Pure Substance Mixtures

is classified as either

Matter

studiesChemistry

PropertieshasChapter 2

Chapter 1


Pure substances have a defined elemental composition and are either elements or compounds.

-All Elements-Pure Compounds -Water (H2O) -Sugar (C12H22O11) -Table salt (NaCl)

Examples:

Elements make up thechemists periodic table.


An element is matter composed of a collection of the same atoms--each having the same number of protons in its nucleus.

A compound is matter consisting of two or more elements united chemically yielding a new substance with novel chemical and physical properties.

+

Atoms of Element X

Atoms of Element Y Compound XY+

chemical reaction


The Periodic Table provides the symbols and atomic number (# of protons) of all known elements


H1p+

0n0

He2p+

2n0

Li3p+

3n0

Be4p+

4n0

B5p+

5n0

C6p+

6n0

N7p+

7n0

O8p+

8n0

F9p+

9n0

Ne10p+

10n0

1e- 2e- 3e- 4e- 5e-

6e- 7e- 8e- 9e- 10e-

The Periodic Table of the Elements is organized by adding a protons and neutrons to the nucleus and electrons outside the nucleus to keep the atom electronically neutral.

Nucleus


1A

2A

9B

Groups are

vertical columns

and show

similar reactivity

Periods are horizontal rows.

Non-metal elements are

located in the top right

3A 4A 5A 6A 7A

8A

3B 4B 5B 6B 7B 8B 10B 11B 12B

Metals account for about 2/3 of all elements.


Alkali Metals

Transition Metals

Noble Gases

Lanthanides and Actinides

Main Group

Main Group

Alkaline Earths Halogens

GO BACK HERE!35Thursday, June 14, 2012

pulp-less orange juice

Homogeneous Mixture--are mixtures that are uniform throughout (tap water, sea water, coke, coffee, jewelry gold, aspirin, gasoline).

A mixture is a collection of more than one pure substance (not chemically united) that can be separated using a physical process.

Heterogeneous Mixture--non-uniform throughout and shows different phases (oil and water mix, sand in water, cement, salt and pepper mixed).


Classify the following matter

Milk Homogeneous MixtureCement Heterogeneous mixture

22 karat Gold bracelet Homogeneous Mixturepure NaCl CompoundAluminum metal ElementDry sugar + flour Heterogeneous mixture

Sea water Homogeneous MixtureSodium metal ElementBrass Homogeneous Mixture


Physical processes are lab techniques used to separate mixtures of pure substances.

No chemical reaction occurs!

Separation of heterogeneous mixture of sand and iron by magnetism


There are many physical separation techniques

FiltrationCrystallizationSeparates substances in a mixtures based on differences in solubility and particle size

Separates substances in a mixtures based on differences in solubility.


Liquid-liquid extraction is a physical lab technique that separates compounds based on differences in solubilities in non-aqueous (organic) and aqueous (water) solvents.


Distillation is a physical lab technique that separates compounds based on differences in boiling points between compounds in a mixture.

Water vapor (gas) cools to form liquid water

Salt water is boiled forming pure water vapor

Pure water


Propertieshas

CovalentMolecule

Ionic Compound

that describe

which is represented by

ChemicalFormula

AtomicNumber

in

PeriodicTable

which is represented by

Symbol

Compound

is either

Element Heterogeneous Mixture

which is either

Homogeneous Mixture

Pure Substance Mixture

is classified as either

chemicalprocess

Matter

studiesChemistry

physicalprocess


MeltingPoint

Boiling Point

Density

Solubility

Phase at 25˚C

Flammability

Color

changing elemental

composition

revealed without

no chemical reaction

which means

associated with

chemical reaction

Change in elemental

compositionwhich defines a

PhysicalProperties

classified as

ChemicalProperties

Observable Properties

Matter posses


Physical or Chemical Change?

Banana browning Chemicalsalt dissolving in water Physical

Tin alloy melts at 505 K Physical

Gasoline igniting Chemical

milk souring Chemical

iron bolt rusting ChemicalWine turning to vinegar Chemical

alcohol evaporating Physical

Silver table spoon tarnishes Chemical

Water evaporates to vapor Physical


MELTING

FREEZING

DEPO

SITIO

N

CONDENSATIO

N

EVAPORATIO

NGas

LiquidSolid

SUBL

IMAT

ION

Matter exists with the same elemental composition in a solid, liquid or gaseous state.


welcome to chemistry 7 welcome to chemistry 7!€¦ · 14/6/2012 · 65.5-72.4 c 59.5-65.4 d 83.3

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