Preparatory Chemistry CHEM 1301
Popular in Course
Popular in Chemistry
This 16 page Class Notes was uploaded by Kara Dibbert on Thursday October 22, 2015. The Class Notes belongs to CHEM 1301 at Texas Tech University taught by Staff in Fall. Since its upload, it has received 16 views. For similar materials see /class/226516/chem-1301-texas-tech-university in Chemistry at Texas Tech University.
Reviews for Preparatory Chemistry
Report this Material
What is Karma?
Karma is the currency of StudySoup.
You can buy or earn more Karma at anytime and redeem it for class notes, study guides, flashcards, and more!
Date Created: 10/22/15
Chemistw 1301 Dr Tammy Hanna Office CHEM 108 tamarahannattuedu The important thing in science is not so much to obtain new facts as to discover new ways of thinking about themquot Sir William Lawrence Bragg 1890 1971 Success in Chem 1301 Read chapters in advance Write down concepts you don t understand Take notes Don t write down every word Make notes if something is confusing Review your notes regularly Practice Do homework every week Practice with end of chapter questions Seek Help Make time for office hours Mon 11 am 12 pm Thurs 330 440 pm Time 69 hours per week Why Chemistry N23H2 2 Fritz Haber Carl Bosch 1917 Nobel Prize 1931 Nobel Prize 140 million tons per year 1 plant 1850 tonsday Supports 4O Amwm aafwo Uses 1 of the world s energy The most important reaction of the 20th centuw 5 Divisions of Chemistry Analytical Chemistry development of methods for the detection separation and identification of compounds wwwindigo com 5 Divisions of Chemistry Biological Chemistry study of chemistry in living systems most active area of chemical research today 5 Divisions of Chemistry Inorganic Chemistry study of compounds of elements other than carbon ie metals sulfur silicon phosphorus 5 Divisions of Chemistry Organic Chemistry study of the properties and reactions of compounds that contain carbon 5H Taxol 5 Divisions of Chemistry Physical Chemistry study of properties and reactivity of compounds the physics of chemical change Where are Chemists Employed Academics Teaching Research E i Industry Research Product Development Quality Control Sales Etc lt zgt aw l ll WWW Most Commonly Used Chemicals Production Rank Name thousands of tons 1 Chlorine 11421 2 Sodium hydroxide 9695 3 Hydrochloric acid 4608 4 Titanium dioxide 1568 Palnt Sunscreen 5 Aluminum sulfate 1059 Cosmetics Source US Census Burqu Production Rank Name thousands of tons 1 Sulfuric acid 41205 2 Phosphoric acid 12485 3 Ammonia 11539 4 Supeiphosphates 8895 5 Nitric acid 7439 Source US Census Bureau Water purification Cleaning Explosives Beginning of Experimental Chemistry Phlogiston Theory When a log is burned it turns to ash the ash weighs less than the original log the missing weight is phlogiston Doubt and Experimentation Antoine Lavoisier burned phosphorus P in a bottle with a partially inflated balloon on top ash weighed MORE than the original P and balloon was deflated Inflated balloon K Deflated balloon Burning phosphorus White ash 39 Antoine Lavoisier 17431794 nnnnnn nnnnnnnnnnn Father of Modern Chemistry Beginning of Experimental Chemistry Continued Experimentation Antoine Lavoisier burned liquid mercury Hg in air which formed a red solid that weighed more than the original Hg burned the red powder and regenerated Hg oxygen L pl d quot30 that it burned m the i ercu i a r Oxygen discovered in 1773 Carl Wilhelm Scheele discovered oxygen Joseph Priestley published the finding Antoine Lavoisier coined the term oxygen and discovered its use Phlogiston theory shown to be incorrect A New Hypothesis is Born Antoine Lavoisier believed When a substance is burned it reacts with oxygen in the air Weight of ash in P experiment increased by the same amount that weight of air in the balloon decreased Mass is conserved Law of Conservation of Mass Mass is neither gained created nor lost destroyed in a chemical reaction The Scuentlflc Method 1 Observation what happens during an experiment Log lost weight when burned 2 Hypothesis tentative explanation for observations Phlogiston explains lost weight 3 Prediction the expected outcome if the m hypothesis is true Phosphorus should lose r weight when burned 33 w 4 Test the Prediction design an experiment t 33353 test the hypothesis Burned P gained weight I when burned Ann mm 39rDFyv magma o 5 Revise the Hypothesis come up with a new quotWmmum mmnhhn explanation for observations Substances quot 39 quot39 quotquot burned combine with oxygen in the air 6 Test new Prediction more experimentation Hg burned weight increased same outcome 7 Theory when a hypothesis is tested and confirmed with MANY experiments mm mm A theory is the closest to truth we get in science Using the Scientific Method a guideline not a rigid set of rules the ideas are used daily in scientific research read literature devise an idea check if idea is original perform experiments try to explain data more experiments 39 gl uaiwagflul was Be skeptical em km Iguass m we 3 mm 300 Pa Sag mu 1mg Varmle hAS I 5415 4 z a an m mam siege e 39 ea in Mus m m www associatedcmtentc0m Scientific Law states what has been observed repeatedly does not try to explain anything unlike an hypothesis or theory NO known exceptions Law of Gravity of the mark com lt w m wwwoffthemarkcartoonscom ngmamma ngummn this ublamable mm vwaGanuunSiuck cum V m mm wyerums 5m ricgrmi alsregar tar we laws 0 5 Phbsms mill not be raleruieaf wwwcartoonstockcom
Are you sure you want to buy this material for
You're already Subscribed!
Looks like you've already subscribed to StudySoup, you won't need to purchase another subscription to get this material. To access this material simply click 'View Full Document'