Week 1 Lecture Notes- Chem 142 (General Chemistry)
Week 1 Lecture Notes- Chem 142 (General Chemistry) Chem 142
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This 5 page Class Notes was uploaded by Chantellioh on Saturday October 3, 2015. The Class Notes belongs to Chem 142 at University of Washington taught by Xiaosong Li in Summer 2015. Since its upload, it has received 603 views. For similar materials see General Chemistry in Chemistry at University of Washington.
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If Chantel isn't already a tutor, they should be. Haven't had any of this stuff explained to me as clearly as this was. I appreciate the help!
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Date Created: 10/03/15
CHMIIS ITRY ILCTI39UIR INI 1TS DAY 1 93 1l This is mostly just logistics of the class syllabus stuff and contact info Missed ExamsLabs Contact Paul Miller millerchemwashingtonedu Bagley 303 if you missed an exam you were unable to reschedule a lab Missed labs must reschedule ahead UG Stockroom no last minute rescheduling Prelabs No extensions for missed deadlines Grading Participation discussion and clicker questions 5 ALEKS homework 10 Labs 15 Midterms 1 and 2 combined 40 Final exam 30 Discussions Lead by TA cannot be more than 5 minutes late to get credit will do activity but won t get points learning through group activities one absence is allowed ALEKS online tutorial system tailored to you contains homework for class so must sign up 60 for 180 days 75 for 360 days recommended to buy 360 days if taking chem series 12 points from objectives 12 points from assessments Exams Midterms 825 AM 915 AM Oct 30 and Nov 23 Final Dec 14 MUST BRING YOUR OWN PURPLE SCANTRON SHEETS FOR EXAMS can be bought UW bookstore CHMIISTIRY ILCTUIR INI TS DAY 2 MHZ115 Math Review Remember when taking square root answer has and Review 095 esp base 10 and natural Log base 10 log1oXY same as 10yX ex solve for y log10100Y 10y100 y2 Review quadratic formula ax2bxc0 gt Review finding unknowns with multiple equations use combination or substitution ex find x and y combination xy1 xy3 xy1 xy3 combine X s y s and constants 2X4 X2 Chemistry Review Must know basic elements of periodic table properties of noble gases alkali metals 1A 2A elements etc Must know how to read periodic table 1 Atomic of protons H Element name abbreviation 13901 lt Atomic mass units gramsmole And how to read Mass number protons neutrons Element name abbreviation The above has 2 neutrons 312 which is isotope of H Isotope same protons but diff neutrons H 2H 3H Atomic mass s only diff bc changed neutrons Protons NEVER different w isotopes bc protons identifies element Electron doesn t change bc atom still neutral 37039 h anion ion w negative charge gains electron signifies anion cation ion w charge loses electron Group 1A always 1 Halogen metals always 139 Earth metals 2A always 2 Chemical name of CuC2 is Copper II Chloride copper can have 2 or 1 chlorine is 1 so Cl2 has net of 2 to become neutral copper must have 2 not 1 Transition metal can be 1 2 3 4 or5 always make sure chem form is neutral Aluminum sulfide Al3 and 8239 must find lowest common multiple 6 so Aluminum Sulfide Al283 net charge of Al is 6 net charge of S is 6 Name compound w two nonmetals put cation first use numerical prefixes cation s name stays same besides prefix end anion s name w ide ex N204 s name is Dinitrogen Tetroxide Cation nitrogen of nitrogen 2 so N2 dinitrogen anion Oxygen of oxygen 4 so 04 tetroxide Some common Chemical names to know H3PO4 Phosphoric acid H3P03 Phosphorous acid HCIO4 Perchloric acid HCl03 Chloric acid HCl02 Chlorous acid HCIO Hypochlorous acid HCI Hydrochloric acid