chem103b test 1

chem103b test 1 - Chemistry 10 \ 200ffin D/ Dr.Koerner...

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Chemistry 10 \ Spring 200ffi n D/ Dr. Koerner Exam2-M*ff13".2008 Write vour name at the top of this page Write vour initials on the bottom of the other pages Count the number of pages now (in case you are missing some) Full credit is only given when you 1) Show ALL ofvourwork and 2) Present gp answer, which is numericallv correct with the correct number of siqnificant fiqures and has the correct units and includes lanquaqe (if needed). Atomic Weights are provided on the Periodic Table in our c|assroom Henderson-Hasselbalch Equation pH=pKa + log (tA- I / tHAl) "P" = "negative of. .." pH =-loglHrO'l pOH =-loglOH-l pG =-logG PKo =-loglG [H3O-1 16 +n. . IOH-I tO +"" K" -PKa Kb -PKb pH + pOH= 14 for an acid-base conjugate pair. pK" + pKo= 14 r6/a7.===---T> t .pt' /roL/'t -a='-:*. 1 t,6 J6ad46?4==fr , az,/o< €- t * /D dro/au,u------ , at /? ts7 -7=fi> t /"*/* Dzt*/Qr'{# /'.L-/^u s$ I 'r/r -:*:1, 1 t0) 09) ) 06) 0s) 20 1 12 1 ) ) U1. 0zt IfuJ C D7/ /^, \ll'^ fT) rotaf ( t4fi^]::.}l o th, lJ"t a':;, Page dl {of8 lotal pages) / your initials here: _
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z; 15, Qb What is the pH of 0.0pQ por+oo^p (ot1 2 3'lr.'s-J &*, s. 1t,o,lo=foaJ", ''''fg.,1 tv' 1"*7", -a e&J e aul ('t"-1 l,go? x/O -scr O.Oto'a 'x : O'otDa *2. /,6e>xto''o )=.|!r* ,.'' 1+"1 * 4,61 ' T6'3EY pDH= o 2"p o,o;r^ /o/- t )o //l Ila =4 ? l.+ 1- /,3o ' tcl b) is the pOH of 0.0250 t, l<.t? p, ? y't D0 tt'l /,lo? /oa . ,! r z,<y rZ-ln1 Ex, is the pH of a 0.01qM triethanolammonium chlorid solution? K5, (HOCrHrhN) = 5.9 x 1O t. PrNtttS 't'" I c),6t1 onu (' C,r, b/O/r7'X E=IW= S,n- 4 ( o-o) ;s s' lbDt + /3^) P,'' b'^ +x f )< , -tl K*{i,=/o -/v ( f.5{ s'e rto^2) - to (o - /'/esxto ,)9 -r" #,u,_= /.tzs,t{o I o, o/o.t'^ ) '.^t, . u.-Y tn' f t'i'lo d-x"a"L! .{:i,1"1,'},-1, , ata lution pll ahqlrt.ol e 2"j o' o'su^ Question tt2 (9 Doin HOC2H2)3NHCl, -s - (,gEsr Page #2 (of 8 total pages) / your initials here: _
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An acetic acid buffer containso.90M CH3COzH and 0.99M CHrCozNa. CH3CO2H has a pKa of 4.21 What will
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chem103b test 1 - Chemistry 10 \ 200ffin D/ Dr.Koerner...

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