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1.
Sampel Mmol Na2CO3 Mmol naoh Mmol nahco3A 1,5 2,5 0
B 0 2 3
C 3 0 1
D 1,8 0 0
E 0 3 0
F 0 0 2,5
Jika ampel !i"i"#ai !en$an la# "an!a# hcl 0,10M !en$an me"o!a 2
in!ika"o#, hi"%n$ nilai &1
'!alam ml( )%mlah *ol%m +an$ !ipe#l%kan %n"%k mencapai "i"ik
akhi# enol"alein !an &2 '!alam
ml( )%mlah *ol%m +an$ !ipe#l%kan %n"%k mencapai "i"ik akhi#
me"il )in$$a %n"%k e"iap ampel-
2. 25ml ampel c%ka !ience#kan hin$$a 250ml !alam la% "aka#.
/i"#ai 50ml ali%o" meme#l%kan
3,88ml la#%"an naoh 0,000M. N+a"akan keaaman c%ka !alam en"%k
4'6*( aam ae"a"-
3. Bele#an$ !alam 0,32$ ampel !i%li#am !ioki!ai men)a!i SO2 +an$
!ie#ap oleh ai#
men$hailkan 72SO. Aam +an$ "e#en"%k !i"i"#ai +an$ meme#l%kan
22,13ml la#%"an aa naoh
0,033M. 7i"%n$ 4 ahan ak"i "e"#ae"il"i%#am!i%li!a !alam ampel-
'M#
"e"#ae"il"i%#am!i%li!a9 2,5$6mol(
. Se)%mlah 1,21$ :O7 +an$ "e#cema# :2CO3 !ila#%"kan !alam ai#,
!ience#kan hin$$a 500ml.
50ml ali%o" !ipe#l%kan 0ml hcl 0,0530M !an !i!ihkan %n"%k
men$hilan$kan CO2 . :eleihan
aam meme#l%kan ,ml la#%"an naoh 0,083M '!i$%nakan in!ica"o# pp(.
Bacl2 !i"amahkanpa!a ali%o" %n"%k men$en!apkan ka#ona"n+a ea$ai
aco3 . :em%!ian la#%"an !i"i"#ai !en$an
28,5ml aam %n"%k mencapai "i"ik akhi# '!i$%nakan in!ica"o# pp(.
7i"%n$ 4:O7, :2CO3, !an
ai# !alam ampel-
5. S%a"% ampel ai# ean+ak 50ml +an$ men$an!%n$ aik Ca2;!an M$2;
!i"i"#ai !en$an 1,5ml
ED/A0,0115M !alam %a"% pen+an$$a ammonia ph 10,0. Se%ah ampel
lain ean+ak 50,0ml
!iolah !en$an naoh %n"%k men$en!apkan M$2; ea$ai M$'O7(2 !an
kem%!ian !i"i"#ai pa!a ph
13 !en$an ,2ml ED/A +an$ ama. 7i"%n$lah ppm caco3 !an m$co3
!alam ampel-
. S%a"% pecimen %#in !i!iamkan elama 2 )am lal% !ience#kan
hin$$a "epa" 2,0300m$
!an M$2; 50>00m$ pe# ha#in+a. Apakah pecimen !alam #en"an$
"e#e%"?
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. Calamine +an$ !i$%nkan %n"%k melin!%n$i k%li" !a#i i#i"ai,
"e#!i#i !a#i camp%#an en$ oki!a
!an ei oki!a. Se)%mlah 1,022$ ampel calamine ke#in$ !ila#%"kan
!alam aam !an !ience#kan
hin$$a 250m 0,0022M !en$an #eaki
Fe3; ; @n2> @n2; ; Fe>
7i"%n$ konen"#ai @nO !an Fe2O3 !alam ampel-
8. S%a"% me"o!a +an$ eni"i*e "e#ha!ap > !en$an a!an+a Cl>
!an B#> !i!aa#kan pa!a oki!ai >
men)a!i O3>men$$%nakan B#2. :eleihan B#2 !ihilan$kan !en$an
men!i!ihkan la#%"an 6
me#e!%kin+a !en$an ion o#ma". O3> +an$ !ihailkan !i"en"%kan
!en$an menamahkan >
e#leih !an 2 +an$ !ihailkan !i"i"#ai. Se)%mlah 1,20$ ampel
camp%#an hali!a !ila#%"kan !an
!ianalii !en$an p#oe!%# +an$ %!ah iaa !an meme#l%kan 20,m<
la#%"an "io%la"
0,05551M. 7i"%n$ 4: !alam ampel-
. Calc%la"e o# ke"ch 'o# o"h( "he "i"#a"ion c%#*e o# "he
"i"#a"ion o 50m< o 0.0250M : i"h
0.0500M A$NO3 . plo" o"h pA$ an! p. :p A$ 9 8.310>1
10. 0,103$ ample con"ainin$ onl+ BaCl2 an! NaCl i !iol*e! in
50m< o !i"ille! a"e#. /i"#a"in$
i"h 0,01M A$NO3 #e%i#e 1,m< "o #each "he en! poin". epo#" "he
46 BaCl2 in
ample-
11. A 0,103$ ample o imp%#e Na2CO3 a anal+e! + "he &olha#!
me"ho!. A"e# a!!in$ 50m< o
0,011M o A$NO3 "he ample a ack "i"#a"e! i"h 0,0581M :SCN
#e%i#in$ 2,3m< "o
#each "he en! poin". epo#" "he p%#i"+ o Na2CO3 ample-
12. /he "hickne o "he ch#omi%m pla"e on an a%"o en!e# a
!e"e#mine! + !iol*in$ a 30cm2
ec"ion o "he en!e# in aci! an! oGi!iin$ "he lie#a"e! C#3; "o
C#2O2> i"h pe#oG+!i%la"e. A"e#
#emo*in$ "he eGce pe#oG+!i%la"e + oilin$ 500m$ o Fe'N7(2'SO(2
.72O a a!!e!
#e!%cin$ "he C#2O2> "o C#3;. "he eGce Fe2; a ack "i"#a"e!,
#e%i#in$ 18,2m< o 0,0038M
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:2C#2O "o #each "he en! poin". De"e#mine "he a*e#a$e "hickne o
"he ch#omi%m pla"e $i*en "ha"
"he !eni"+ o C# i ,20$6cm3 -
