WEEK 2: Chapter2 Acids and Bases
WEEK 2: Chapter2 Acids and Bases CHEM2410
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This 12 page Class Notes was uploaded by Gloria Godswill Basil on Friday September 4, 2015. The Class Notes belongs to CHEM2410 at University of Toledo taught by Sucheck,S in Fall 2015. Since its upload, it has received 141 views. For similar materials see Organic Chemistry I in Natural Sciences and Mathematics at University of Toledo.
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Date Created: 09/04/15
Acids and Bases Central to Understanding Organic Chemist canquot I UIu an acid loses a proton H l a base gains a proton an acid loses a proton wOMOFumxn 4 39 aye Reversible e acidbase reactions are reversible ABCD AB gtCD A and 8 form C and D CandeormAandB r I I A and 8 form C and D but C and D do not form A and B OMJMMK 813112015 Mootst m Econs cGA39 Aqu w h i em 0 Mid U 0 43m 506 Acid Strength very strong acids 13quot lt l moderately strong acids pK l 1 3 Weak acids PK 2 3 very weak acids PKa 5 15 extremely weak acids PKa gt 15 The stronger the acid the larger the K The stronger the acid the smalier the pK ennth pH pH log W The pH indicates the oonoemmion of pmtons is a solution enun wnB Imk Carboxylic Acids are the Most Common Organic Acids O O i 395 CH3 OH H OH acetic acid formic acid pK 476 pKa 375 8312015 4 t J0 9 WELM CH3 methyl alcohol ethyl alcohol 5 pk 159 omn CH3CH2 Am 39 Nagy ouds magma cc 09x3 0 WM A ohm CH3NH2 methylamine 1 Own NH3 ammonia px36 CH protonated methylamine M 107 CH3CH protonated ethylamine M 110 E l O f 393 mm pko ranuu Wmm p a hoax e h gamma Wis a com 0m oddi s g pmhwn Ma 3 MQnQ N JJ W a motonated amine RUM an akohol 20 I water mfgt 3 J The stronger acid beh ves as the acid mactams NH3 9 5 9K 151 Water is the acid 39O tu h 3910 mg 39i H 0 UK b woumuw k 5 k6 5 reaciom 611g mass 90 MW F 0mm0p 9 5 vendhvm E s We Md we mse ME I 0 39 3 MW add C NH r C ct cu g 3 CH o N3 weaker acid m u 39 lt I 94 l39 CHJNH CHSCH 10 CHM maid add 390 159 mm quot u is 5H0 0 1 N53 a M W J I a 6 w hqu HQ Yo Wigwo RFCquot HlO bin 9 0 N rend tea 3 5 J 39 38 1 3ka g gk gq quot We Wm the has V 7 V 39 0c We mc53939 dei 39wnvaod Q Oe okom L as 3331514 3 A m we ech WWW J 7 6 Wm 3xquot V 39CH3 CH3 WW metpylarzti ne39 W kwm cmj 023 W h Hmdgn j 0A 9 YDQYG U quot C2 KW r i Toreelectronegajivg than en M509 9 e quot 39 nm h 5 4 an 4001 bewuugea O39ngxan Y OKE PKW mgr imam 152 QQXKQODM nc nquot hnfegt1j ndht k CH3 2 6 in gym quot lax j a 7 protOhSted methyl aWthol protonated methylamine ifz sragv 957137 4 j i n9teelectr9rzegatjyeh 394 39 r w 1 M A u 47v CH3 j V 3 2 l fd apnbxg m H as LL45 L f mans 79x52 mum pxm 39 J A 39 r r amphsv r 0 km mum kg 7 inductive eiectron witl39ndmwal f Qimwg animma Wk 8m136 56 Ex n r J 306 more ekedrmg goe W wow a w VWW W LWQv 7 39 9 h q o o o I l 1 0 I C C C mngn muscncuz CHscl Hmmf mmmmfm a W i W L39 C gu lgU U13 u c J C mm electron 39 d 0 0 IOIIMPWIMM W he aw W9 10 990 eiedfggn in W X3 m V a dms 31L 008M w39gvem mud 39 gunman h Summary of Factors That Affect Acid Strength electron delocalization u stronger weaker I more less stable R C RCH20 stable weaker 0 stronger base base av mam l39he Henderson Hasselbalch Equation HA pKa pH logA The Henderson Hasselbalch equalion tells us whether at a given pH a compound will be 39 39 with its proton or without its proton A Compound with pKa 52 blue acidic form Queen basic form 99 90 50 I acidic form 10 I basic form 1 32 42 52 62 72 1 T pHpKI T pHpKa2 pHpKi1 pHpKa1 pH pKl 2 pH Duh 12 atidic form basic form RCOOH Rcoo H RNHs 7 RNH2H Acammqlicacidisnmhlsuddcfotmammudhhb chm mmswhuwmmmhhmm cinch1 A H30 gt HA H20 A buffer solution contains an acid and its conjugate base swam Mu Lewis de nitions not a species that accept a share in an electron pair to a species that donates a share in an electmn pair A mMamwm AnmumamMnn campy cu 0 1 CH3 CH3 CH1 Cl Cl CH3 mm H39 dquot quot9 quot ether lLewisxid b Bf H Br H A l Br Fe Is JH BrFfTH Br H Br H Whamide amwia aLewngjd m 39OWP Mn 36639 proton dona ngadd norIpfoton dona ng acid Md 3 compound that shares its elec n ons with a proton 39bese39 gt that shares its electrons W a eompound o wer than a proton with an atom N PO oowgt brhgwa T mx r 39
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