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titrations solution - CH!“ 23 acids and bases Clemens'l...

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Unformatted text preview: CH!“ 23: acids and bases Clemens 'l. The following is a list of acids and their Ha values: H23 K. =1.1a1c’ HDCi K. = 3.5x1fl'a Hitler2 K. =4.5x1o" a] which acid is the strongest"? time . . . . ag3z1 W+tgc In} Write the K3 expression for this and in“); "r a. LHJGL) c} Which acid has the strongest conjugate base“? k‘kh hm] Wit I-tcct CW 2. Consider the following reaction and predict which direction it will proceed: a} HN02 {an} + CID; {an} 6-} HClCe {ac} + NDa‘ {are} .i i ‘wfii 5a #— bi H30; {an} + “03' {sq} 6-) HNGa {an} + 803“ {Hal ’l ’l we at. 3. If [Hao‘] = 1.85x1ti‘alui for a solution. then calculate [cH']. Is the solution acidic. ' ‘* basic. or neutral?I 09:th mo Ow} vii-iii Col—l“) ' ac x16“ Ml“ 4. If [DI-r] = Elflfifl fl'mhl for a solution. then calculate {H301}. Is the solution acidic. basic. or neutral“? ‘ U136] = atomo3 Pace 5. Find the pH of the following solutions and indicate whether they are acidic, basic. or neutral. .[Hafl']=145x1fl'alil 'Firl‘ 5 33:; FHD'ILI [.I-l=afl*] e. 56:11 0"“M PH—- 01 lg?) £35m [.|-|=30‘] 3.2flx1U3M 9H: Elli? {imam 6. Given [GH']. find the pOH of the following solutions and indicate whether the solutions are acidic. basis. or neutral. 'nr. [0H]=D.DD'TM pflll "7 3‘9 v. [oi-r] =s.s4x1n"M 33H = {0197? iii. [Cll-I']=5.5t]x1fl'2M Dbl-l ; l 214:0 E". Find the [H30 ] of the following solutions and indicate whefl’uer the!“r ere eoidio, besio. or neutral. vii. pH= 3. 55 11-1535} 2 £50. DEL! viii. pH- -— EDD Ell—13:5} : $0le . “4 ix. pH=Q.‘I1 {Lbdj= ’TIEErfi-lfim 3. Find the [DH] of the following solutions and indicate whether they“:r are acidic. l:IiiIsii:r or neutral. 1:. poH=12.15 'T'Ji'l‘j: '7. WU‘B‘M xi. pOH=5.25 {gm-.71: ‘Einr‘Cibrfm xii. poe=s.§_1 Colt-:3: g egg-IO *m 9. If [UH] =B.EX1G-9M. find [H30+]. pH. and FIOH. @5973 = lei-”6% P‘h : a '3;- ms;- {3' B 10 Complete the fDIIUWinQ chart. “www— . 2;- m ___— 1]. Calculate the pH of a] not-345M HCl Cflgij]: iii~ o‘DBkiE rfl PH: =2. Lilia b} 5.5x1iIfMNaoH Calif]: 5%...55m pgfi: Li-Zio PH: '3;qu ‘3} ”-flflfimmflflh COW]: Smart-n EH: L341 spit-.- tail CHEH 25: Wash acids and bases 2 Elsmsns 1. Tho psroont ionization of hsnzoio acid lfiHsCDDH} in 3 [1.11m solution is 2.4%. What is tho pH of the solution? _. + 9? NDU‘WA CullsCDDH if lira—D ‘7 CLEH'5CLD +H3Q ta wt was ; 3;? E x X g, u .51- ________—- — ——- $6“ $555 (MD a 04vi x .X R?” A 2. The pH of an 119:1. aqueous solution of oaproio aoid. HCanflg, is found to be 2.94. What is the Ku valus for this acid? 65%;: m WWW 2.1:..qu A 'll._ lilo :5 Q chllfiol + Rio 97%;? *Clelbz_ - om? i x X _ ._ Asbestos.) M k. .. 9.3434 x X Homo» Til: Avatars?) 3 (wig: HEW-3m = LMé‘SZngIS3D 41.3»? 3. Calculate the pH of (122M dilorosootio acid [pKa = 2.35}. (’9. mg _ I. 124163) ”Plot r: 4%Ncu l4“ 2:: WHO-3 QtQ‘ALiooH "r lit-Lao L? $56“ + CECHlCGEET C) film X X XX 0 '27.“? x X z _ ...‘<_. : mot? x1 :gma‘lo Luigi‘s o. -—‘>r.' X: OOH Ur — HY qflb) T12 mm: [lbwg l—l: ‘ .c . Fl D (”[93 a "1'. HRH) 4. Calculate the pH of H.025!“ aniline, CeHaNHz (PK!) = 9.13)]: Cal-BNPL 5r “1b #3. DH“ t- C:.::Hgl‘0l—l;§l iii 1 6. 038m x X i309? lit. ‘1 __________._._-—-—-—-—)<'—'_—_'—' ——-—-' or 5;“ W ’< C 5"” +1 1 -b % i ~_ 7:41:16“ :1}: ._—,; 3t=Ccirj= thsfiil‘b M 0' 0 case ones mileage 19H: 9.31., 5. Calculate the pH of 0.15M sulfuric acid {please find the Km and K32 values in your book]. ‘ 2" 3. 93% We a 23 L:><____ *_>‘-'_L a er mam-x 0-5:“ Q’ 0le 0va (i _ —. “l = — D —-. ‘7- [ U] * {its-t X — 04$ + 321le 0.4103,] t4“; 2 xbeS fl .2. «— l.l>Uc a @‘3 P8 39.4.: 07ng (ti-L5 H13 ( {57) flaw 3. Calculate the pH of DJEM carbonic acid {please find the Km and KB: traiue So in your book). i- ___ —:,L $41.: {'0- ® H933 + the L7 H30 5r" 9&3 Kan “was “MW D13.“ .I'l [31161: (LIE-pf Lfll/fflL“ “‘5” Q :.-. HLN6¥ I}: X1 1 H 2': we} +-.co‘~£=oEr-s‘ {ii-6'3: ”0.15 ‘X’ {Had} 2;? X1! iii-c.1315; +003”: ‘0 -.~ 0. . “Sinai. Kag 50 some 305965 M it first or 3 i214 1“ r355“ S‘V-«Q to w? atbi‘o‘rt— EL 7 _ 5t 3" ”Pix- 4031M}? 3561 aw 'i". Look at the following salts and decide if theyr will be acidic. basic or neutral JON when they:r are dissolved in water. 4m:- a) NaBr Yuma] was In) Ca® 395k ' ateli- ct Nl'hGI WI.- :1) itNo2 "i533”; ). CHEN! ZB: Buffers Glemens Please note: for some of these problems i did net include the Ka or Kl: value. Use your chart in your textbook to look up these values. if you need them. 1. Calculate the pH of a omaM NaHCDa {you will need to look up the Kama values}: If“ _ __ HCQT “l Lit-.30 “7 Chit—3' ' a}? I_'.|_.-"- .. -. I.) £-;;;-._ C}; = J L? '3': t: —t _ rI 'k- -..'J . I.-fa _ I'll-:It'l'fl J-Q'IS f , 1-1;): . w .7 ".- J. _U._._ __iy ". - ..-._. " < -- . 7 at}! I} ,~_. . -. - t a a . .—. ~ r}- I) LIT-l I -E .- 533, l‘flo __. .. L gxifi 3 t— r 3:1 “italic-“m ~ Ha LI: 'I “— A - to ‘5 Ph ~ . : _J" "_5 5. .xrr [\“-—E ' 2. What might tie a good buffer system [combination] to use if you wanted to prepare a solution with pH= 4.5? -. It”. . . "'l =2.” has; a— r .. l..- at: -o «- ' "3' . : Ll 7“; I'FI'I. If} 7L.“I:L 19TH: H: i_.-- {xiii-J”; .r___ [— '.. M" 3. Calculate the pH of a solution that IS I}. 25M HF and o. 1DM NaF. o“. 2.x: "r‘r t' Iirl'l'? - _ HIS-1:) r I! II? .I :33- j . a, 4 '\. - - - t . . 1 _.-. _ . . f 3.13:th a. l ‘ . j ' “I ‘6ng it} a H ""“'"'-“’ _x: 134.351.: I.'~‘II. 35* '-".'.‘1:O——-r-_t——. 4. What Is the pH ofasolution that results from adding 25. DmL ofD. BEGUM I. - _ “th NaDHtoZfi. flmLoffl1DDMlaotioaoid{Ke=1.4x1fl"). remix: 3:”; -—— --- rt” "' GM “-22 Pt" ~' lio- 3 -- t,-:I.:5*;.t., -— 333-37.: - Juliet“: [II-t;l:-;- I .- I - 1—- UlDOiBBrWI x75 .{jolafiufiwgi T' 'l, _ ._.- : Pia: ' I:{1J Eu- :: ta . a £75353 is Ij’ I-rsnr I33. ”I _ 5. What mass of potassium oerbone must be add to 1.IIIUL onLfUUMl KHCDa to prepare a buffer solution with pH = 11.fl? Pie-Ii. Z “3-2;: L L)“. E; \J F. o "-._L o d :53}: :‘I dig“, _‘lriis.L}h__ 3331‘s, 1 by Ego If a ' O} H— i I WSW”); \ '. refs-3k 0? E. eensider1flIILDmL of buffer solution oontaining III. 15M NazHPU'4 end 5.10M KH2P04_ What Is the pH otthe buffer solution? K‘D‘e :_- ..‘ .~.'> r. a sen-s I 3.20 _ v i U’ J i .I b} what Is the pH after the addition of El]. lL'ImL of III. U1DM _I’Nggijto the buffer solution? =32: ‘ : '— {HQ}; . Hm: i+ Hbi-I {ii I. 0.3053 D ours-s sud m..- Kl _ __Jg-J-EJ‘PL; - .D'J'J‘BrI-f ' 3533:3132? i' I .2: drums-:1. 9i” 5‘3 2 " 11-13: '* "i. ELM _. {ii LI? LT our; s -*’ o} What Is the pH after 15. lIimL of 1 .IIIM HMO; Is added to the buffer? Vest s 1.4m? " -- .- I303. I' ‘3‘ Idz'l. OD'I'L‘ImrfiI Dflifimuil 54* VJi-SIP'J‘! Ir}- ._._ 0.010 —" fjli.':jl'.'._}f.'t~=j 1' (3:05 Jqf'ail'. {.'.-T. . A” I d“ J (72; U. Diriamfl ’6' i “a“ ‘3‘ ”iii”- fii IMP-3h v'f Iii-Ts} i‘ilpi—JM 4 III.) 1:) _ "ii—f lip)“; -_ '_ Q54; If“; .. I ‘ "h; QM - h] ' glib} _ 0.1m. 5., 0...; .1. U I} __-"'~.( ' -' j-ij—i = i. .2 ‘1". If In. a? CIT??? “ 'r‘ ' _:-'~._,__-__ - CHem EB: Tltratlensll Glenn: _e QUIUML. (a W13 13?; 5 pm =55; 1. Consider the fih‘eiien of 0.15m pyridine [C5H5N. K, = 1.5x1D’°] with L161: {1150M HEI’. a] What veiume of HBr must be added to reaehfl1e equivalence point? The midpoint? mud—m- a WED :1 \m . 1L. 2 t: mod 1‘“ ”‘1' I an / 0 50m W“ . :1 mg b} What isthe pH before anyeeld isedde . i (W . C395“ 2* “39> ‘7 CEMENHJr *‘rDHL .-' 0.1 SD ‘43- :5: “3i- X__._ 4.. UIE'EW ‘~ X «if; X: lew'fl X=ij=1gxr65 (we *ewf Cit-“.33" 13ij W31 .' 471 4 OLA, Y Mafia 0L3, BU, “Gi- 9+ c} Whetisthe pHefter1fl.flmLefHBrrsedded? ' PP“ ? ' CEH‘SN + H3» {'—/ C3145 [‘3er 43:: EH {0.01m} 0.53ij {Ommmmg 3 -Drt~n~b[l 1-3 ”Nh] ‘53 --:1r€_ We “Semi 4 *-~?m‘~ Eumr' 1' 5 fl. _ 1PM: W4: 1'05 =— '15 N" .-_ dJWhatietl'Iepi-Iatmemidpufi 58* 1L5 Wfl W: W11 C ‘9“: WM *3 wow!) e] What is the pH at he equivalence paint? DEW-a» CERS NW” QIEo—Effi )4 {<1 U113 Q ma .3 O-O‘TSWW afifiw 5913.32, 0 0%er / mm 01! J, Eégwssm + HQDL’ Calm 1“ H35} X1 .3 ewio‘? ' 2"” f7 rm - ' 4i a ktflggz =7}le DATES—X X' k “rm: Alt: PA a f) What is the pH after dflflmL of HBr is added? 3.. is @FQW * 3w “’ 9 3 (“Md 15“ “$ng bet 2 How fiafiwk re 250M M h h . y m d . giflHh e to 15.flmL ef fljflflht HNO~3 to reach the equivalence paint? Gereflii! There’s a trimmers! a We + WW3; *4? “smog; + sewn 5:99;} J1— . PM —--1-m% 000%? 1000M. IIL Emmi mg} 0M1 “ml 50m in] what is the pH at the equivalence point? 3}. fir. Stx + 33 3. If 35J'JmL ef 0.1?5M HEN is titrated with 20.0mL effl.1fiflM NaDH. what is the pH? Hm 4.— m bin *2 warm 4 H10 |¢k CHE-ND = (seam-m) (fluteflm‘guhy Q22 )0 5-10 b-iE-T’Bcrmi 3W\ ...
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