CW 12(1) - Class Worksheet 12 1 Problem types in Acid-Base...

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Unformatted text preview: Class Worksheet 12 1. Problem types in Acid-Base Chemistry. WA [H304] :AHQLG, WQ CO>>K0V Buffer wt): Mme PH _ wriggtfiai‘gj It: 19%gggoz 2. Another Reacting Mixture, Forming a Buffer. A solution is formed by mixing 40. mL of 0.10 M NaOH and 100 mL of 0.10 M HAG. (a) What is the for the large shift reaction that takes place? Hprg 4r OH, ‘—-'> flgf‘k HLO (b)Whatarethe ' ' ' present after this reaction is complete? I, e U QNVEK ENafl; EH]: 0"0Mé[i%>:_ 0 02.94 M s H - Ema] :_ 0.10M .5 0 07:4 " FF H 0 MC“: an+ 0H “5 41a + 2, q 0 7L:O'OL% I ago-no 0-023’6 , -3“ +% c bk 0.0M ‘°’"‘*~ 1" a o .093 0 n ; [TWPMZ‘i Lfil—e O-OQBM [file ]= O'OléiM, (c) What is the pH of the final solution? w—L Law-L a; a PH w: F'kk"’og fig; : —— log b.0- szillfi'g):0":¥7 (063:3) PH=_LL_’ 5 '7 3. Design a Buffer to Setlihe pH = 3.00. I H < P Ka— a; u (a) Select a CA/CB pair with a sz = 3 :l: 1. > [c 137 Use HF and FR withpKa= {Bun—t (~14372x1040 .1 fim I ('3) Calculate the [CA]/ [CB] LatiQ needed to obtain the specified pH. W Q03 :2. ?}<g~—FH ~ 'ti‘ALSX— ba‘Ha $J4fl-jialaavae— IO E553— Eflj afl I.O[P“"~*?D i [CE] _ o(3.ss—2-Oo>:ir'33’ [CA]/[CB]= haste-L, (c) We shall use 100. mfof‘mo M H F (the CA). What xglume of 0.10 M No}: '7 (the CB) should be used? , 5p] _ \lgg _ {he fl CW9 :DaiWXIOG ~———:"‘ " ,_. f.— ..—- .‘._._—-n [F3 [hlg CBV'E) 0" XV-B \ZYH—U'lxtoo . Uer/l} \VB=-———7 Q‘ML' 4. Graphing [H30"'] and pH for a Titration of a Strong Acid (in the beaker) with a Strong Base (in the buret). We shall titrate 100. mL of 0.100 M Hcl using 1.0 M neon. (a) At what volume of NaOH is the equivalence point (EP) reached? flLQ fiHLL_ E??? (XE-:rqg CPrVQ 1" 03% V33 100%0'1 2-. P07”? V13; $23.22;! ;I0»~L (b) Plot [H30+] vs Vfiaofl during the course of the titration. (c) Add above a plot for [OH‘], which appears after the EP. (d) Now plot the pH curve. O 5 9 10 11 15 (in mL) 20 ...
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This note was uploaded on 02/14/2012 for the course CHM 2046 taught by Professor Veige/martin during the Spring '07 term at University of Florida.

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CW 12(1) - Class Worksheet 12 1 Problem types in Acid-Base...

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