Understanding Chemical Reactions: Acidity and Acid-Base Concepts
School
Manhattanville College**We aren't endorsed by this school
Course
BIO 123
Subject
Chemistry
Date
Dec 11, 2024
Pages
4
Uploaded by ChancellorOtterPerson400
CHEM 250 « Broyer University of Southern California Fall 2023 « Page | ol 4 Name N o B Worksheet 2 » J Chemical Reactions and Acidity © D i 2HLA — (o 3 | I Brensted | (base) (acid) [(’”m(’j”] [CO”{;’W j PRy =7 roton (H acceptor donor P (17) | p ® © LB:”~ LA == [B-LA @ ) ‘ Lewis @ase) @cnd) e lone pair | donor acceptor &2 J [. Show how H2N© + H20 is an example of a Bronsted acid-base reaction. / I \ H I O Iy * Predict whether the reactants or products are favored. e 2. Show how an ether + BH; is an example of a Lewis acid-base reaction. / N\.\ &y \.-( O N N B) H {—=CI = very strong acid -8 O (_favored ) V;i?dk DK : Sy D® l SO g < \/Q@ PA, ® © | | H,0-H Cl reaction favors the reaction favors the strong side with the side with the acid higher pK, L[ weaker acid P Cfdvorcd) ® )L in this reaction, th > H,0-H O . starting materials are favored by a factor of 107 !
UK NE r , CHEM 250 » Broyer University of Southern ¢ alifornia ol - sl Bn The pK, Short List % AL i H-Cl H % i %H }120 H—==H N 19 CHy ; R” “OH ; & i -8 ", 5 10 16 23 39 S0 ® 0 HZ.O.:/—\H"/;\ e H,O—H A (—] | Gonjugat@ Gonjugat@ base @Cl@ k acid %) % base ) [”306)“/\:@4’ If K, > 1, then the equation means —log K, which is useful because Ka ranges from 10°" — | 3. B [II;;O@][AG] K = P PRpiooks »d o KIH,O0| =K, = .07 [H-A] ‘which rearranged gives K[H; | =K, H-A] above describes a strong acid (favors product), but if K < 1 1t’s a weak acid. The term pK. 20 — 60 (approximately). 01 So pK. ranges from — dot structure for the molecules below. Be sure to draw all of the bonds, Draw a complete Lewis sible draw an important lone pairs, and formal charges. If multiple resonance structures areé pos (major) resonance form. tert-butyl alcohol (CH3)3COH acetic acid, CH3CO2H HoN?2 .. O >¢Q\’\ / \\ K ) H-N=N—H &J H_ “’lfl \ oV P \\\°(\/ o (/ "'@'—\/\ % (\ L ‘ el 15, w@ e € e ~ (— 4. Which compound is more soluble in water? Briefly explain your choice. CH3)2NH/ or CH3CH2CH3 / xZ N NR 9 j%m@\u}o@\“\sz&\‘\ \Q \Q@\ar
TN WL '."".H,".’,‘H,"‘ Y 1 1)) A v"i’! Ty IR F ) ) A ” ¥ M) I N4 J /) [{1{) ',"”’ 1) SIEMEIRP A f / | 11 “l‘ "l‘;"“" ;Hl" ‘," | VY "l‘ "' M ‘f” ‘HH;" IS L ‘l'lfl 1118 IIHH 1) "t' ”;' Vil L = (—? o4 (‘t At oot 8 Wl D T e S \ r{ I Vor the wndioated ivdrogen stom, estimate the waler relerence pii 11 ) [ | | A " { ) [ )1} { )1 following acld bas
CHEM 250 « Broyer Fall 2023 ¢ Page 4 of 4 University of Southern California ' ‘1o 1l - » M * DC ()\\ o Cirele the most acidic among the Hydrogens drawn in in the molecule bel i H g . 0 P J F @O SN H// @) 0O =0 e L & H 9. Provide a plausible acid base synthesis for this molecule. You may select from the following reagents.