KOEFISIEN DISTRIBUSI DAN TETAPAN KESETIMBANGAN REAKSI PRAKTIKUM KIMIA FISIK II
LABORATORIUM KIMIA MATERIAL DEPARTEMEN KIMIA FAKULTAS MATEMATIKA DAN ILMU PENGETAHUAN ALAM UNIVERSITAS PADJADJARAN
Koefisien Distribusi • Koefisie !is"#i$%si &!&'&( )e#$&!i*& +ose"#&si +&se"i,$&*& -&" !&'&, !%& )e'&#%" .&* $e#$e!& .&* "i!&+ s&'i* $e#/&,)%# • F&+"o# .&* ,e,)e*&#%(i +oefisie !is"#i$%si &!&'&( )e'&#%" o#*&i+ )o'i+'o#oe"i'e !& )e'&#%" &i#
S.&#&"3s.&#&" )ee"%& !e*& ,e**%&+& +oefisie !is"#i$%si &!&'&( se$&*&i $e#i+%" S4e('& 16607 1 Ti!&+ &!& #e&+si s&,)i* 2 Ti!&+ "e#8&!i !isosi&si !& &sosi&si 9 :&" "e#'&#%" "i!&+ $e#e&+si !e*& )e'&#%" ; Pe!is"#i$%si& -&" "e#'&#%" )&!& )e'&#%".& )&!& s%(% +os"& Pe*&#%( )e#%$&(& "e+&& +ose"#&si s%(% !& 4&#i&$e' '&i )&!& +ese"i,$&*& "e'&( !i#i*+&s !&'&, )#isi) Le <(&"e'ie#
Penerapan Prinsip Le Chatelier • Kose"#&si #e&+"& !i+%#&*i ,&+& +ese"i,$&*& &+& $e#*ese# +e &#&( #e&+"& $e*i"% 8%*& se$&'i+.& • Te+&& !i&i++& ,&+& +ese"i,$&*& &+& $e#*ese# +e &#&( #e&+"& !e*& 8%,'&( ,o' .&* 'e$i( +e/i' • Vo'%,e !i)e#$es&# ,&+& +ese"i,$&*& &+& $e#*ese# +e &#&( 8%,'&( ,o' .&* )&'i* $es&# $e*i"% 8%*& se$&'i+.& • S%(% !i&i++& ,&+& +ese"i,$&*& &+& $e#*ese# +e &#&( e!o"e#,i+ $e*i"% 8%*& se$&'i+.&
Tetapan Kesetimbangan Reaksi Koefisie !is"#i$%si ,e#%)&+& s&"% "i)e +(&s !&#i "e"&)& +ese"i,$&*& .&* $e#+&i"& !e*& +e'&#%"& Ke'&#%"& s%&"% -&" #e'&"if "e#(&!&) -&" "e#'&#%" !&'&, +e!%& )e'&#%" H%+%, !is"#i$%si !i*%&+& !&'&, )#oses e+s"#&+si &&'i"is !& )e#s&,&& "e"&)& +ese"i,$&*& !&)&" !i"e"%+& ,e'&'%i )e#s&,&&7 I 3 K C = [ I 2 ][ I ]
[ ] −
−
TUJUAN
1Mee"%+& +oefisie !is"#i$%si K D !&#i io!i%, I2 !&'&, )o'i+o#oe"i'e P
PRINSIP
H%+%, Dis"#i$%si Ne#s" Ji+& s%&"% -&" !i"&,$&(+& +e!&'&, s%&"% sis"e, .&* "e#!i#i !&#i !%& )e&#%" .&* "i!&+ s&'i* $e#/&,)%# ,&+& -&" "e#se$%" &+& "e#!is"#i$%si !i&"&#& +e!%& )e'&#%" se!e,i+i& #%)& se(i**& )e#$&!i*& +ose"#&si se"i,$&* )&!& s%(% "e#"e"% K D
K D
=
C O C a
=
C O C a
Li+e Disso'4e Li+e Ke/e!e#%*& s%&"% se.&=& %"%+ '&#%" !&'&, )e'&#%" .&* ,e,i'i+i +e)o'&#& .&* #e'&"if s&,&
Re&+si Kese"i,$&*& Ki,i& #e&+si +ese"i,$&*& !i,&& '&8% #e&+si )e,$e"%+& )#o!%+ s&,& !e*& '&8% #e&+si )e*%#&i& #e&+"& .&* $e#'&*s%* se/&#& #e4e#si$e'
Re&+si Re!o+s Re&+si se#&( "e#i,& e'e+"#o .&* ,e.e$&$+& )e#%$&(& $i'&*& o+si!&si Re!%+si 7 #e&+si )e&*+&)& e'e+"#o .&* ,e.e$&$+& )e%#%& $i'&*& o+si!&si O+si!&si 7 #e&+si )e'e)&s& e'e+"#o .&* ,e.e$&$+& +e&i+& $i'&*& o+si!&si
RAKSI Re&+si Pe,$e"%+& I 2 o'e( KIO9 IO 3
−
+
6 H
( aq ) +
( aq ) +
2 I IO3( aq )
+
+
6 H
( aq ) +
−
6e
−
→
−
I
( aq ) → −
5 I
( aq ) →
( aq ) +
I 2 ( aq )
2 H 2O
2e
+
3 I 2( aq ) + 3 H 2O(l )
S"&!&#!is&si N&2S2O9 o'e( KIO9 2−
2 S 2O3 ( aq ) I 2 ( aq ) + 2e
−
I 2( aq ) + 2S 2O3
2−
2−
S 4O6 → 2 I ( aq )
→
( aq ) →
−
+
2e
−
S 4O6
2−
( aq ) +
−
2 I
−
Re&+si Pe,$e"%+& Ko,)'e+s > I2
I2 I2 I2 I 2
&,i'%,
+o,)'e+s &,i'%,3io!i%,
Re&+si Kese"i,$&*&
I 2 ( aq )
+
I
−
( aq )
⇔
I 3
−
( aq )
ALAT DAN !A"AN
B&(&7 • A+%&!es • A,i'%, • As&, s%'f&" • N&"#i%, "ios%'f&" • K&'i%, io!&" • K&'i%, Io!i!& • Po'i+'o#oe"i'e
PR#SDUR Penentuan $assa Jenis Sampel Pi+o,e"e# 3 $e#si(+& !& +e#i*+& 3 "i,$&* 3 "&,$&(+& &+%&!es 3 %+%# s%(% 3 "i,$&* )i+o,e"e# $e#isi &+%&!es 3 (i"%* 4o'%,e )i+o,e"e# Pi+o,e"e# "e#+&'i$#&si 3 isi !e*& '&#%"& s&,)e' 3 "i,$&* 3 (i"%* ,&ss& 8eis s&,)e' ,&ss& 8eis s&,)e' !i+e"&(%i
K&'i$#&si Pi)e" U+%# Pi)e" %+%# 5 ,' 3 $e#si(+& !& +e#i*+& 3 ,&s%++& )e'&#%" P
Bo"o' +e#i* 3 "i,$&*
3 )i!&(+& Bo"o' $e#isi P
Stan%ar%isasi Na&S&#' oleh KI#' KIO9 01 N 3 )i)e" 25 ,' +e !&'&, '&$% e#'e,e.e# 3 "&,$&(+& H2SO; 2 M !& KI 9 M 3 "i"#&si !e*& N&2S2O9 !&'&, $%#e" (i**& $e#=&#& +%i* ,%!& 3 "&,$&(+& &,i'%, (i**& '&#%"& $e#=&#& $i#% 3 "i"#&si +e,$&'i (i**& '&#%"& "&+ $e#=&#& H&si'
Penentuan Koefisien Distribusi Bo"o' 17 20 ,' I2 !&'&, P
3 )i)e" 50 ,' I 2 !&'&, &i# 3 "&,$&(+& KI 3 "i"#&si !e*& N&2S2O9 H&si'
Bo"o' 27 15 ,' I2 !&'&, P
3 )i)e" 50 ,' I 2 !&'&, &i# 3 "&,$&(+& KI 3 "i"#&si !e*& N&2S2O9 H&si'
Penentuan Koefisien Distribusi Bo"o' 97 10 ,' I2 !&'&, P
3 )i)e" 50 ,' I 2 !&'&, &i# 3 "&,$&(+& KI 3 "i"#&si !e*& N&2S2O9 H&si'
Penentuan Konstanta Kesetimbangan Bo"o' 17 20 ,' I2 !&'&, P
Bo"o' 27 20 ,' I2 !&'&, P
3 ,&s%++& +e!&'&, $o"o' 3 +o/o+ se'&,& 90 ,ei" 3 !i&,+& se'&,& 20 ,ei" (i**& "e#$e"%+ !%& f&se
f&se &i# 3 )i)e" 25 ,' 3 "i"#&si !e*& N&2S2O9 H&si'
f&se o#*&i+ 3 )i)e" 5 ,' 3 "i"#&si !e*& N&2S2O9 H&si'
3 ,&s%++& +e!&'&, $o"o' 3 +o/o+ se'&,& 90 ,ei" 3 !i&,+& se'&,& 20 ,ei" (i**& "e#$e"%+ !%& f&se
f&se &i# 3 )i)e" 25 ,' 3 "i"#&si !e*& N&2S2O9 H&si'
f&se o#*&i+ 3 )i)e" 5 ,' 3 "i"#&si !e*& N&2S2O9 H&si'
Penentuan Konstanta Kesetimbangan Bo"o' 97 20 ,' I2 !&'&, P
f&se &i# 3 )i)e" 25 ,' 3 "i"#&si !e*& N&2S2O9 H&si'
f&se o#*&i+ 3 )i)e" 5 ,' 3 "i"#&si !e*& N&2S2O9 H&si'
PR"ITUN(AN 1 Pe,$%&"& '&#%"& KIO9 N&2S2O9 KI N =
m
.
1000
Mr V (ml )
.ek
2 Pe*e/e#& '&#%"& KI N 1V 1
=
N 2V 2
9 Pe,$%&"& '&#%"& H2SO; N =
%. ρ .10.ek Mr
; Pe,$%&"& '&#%"& &,i'%, m % = .100% V 5 K&'i$#&si )i+o,e"e# mair V pikno =
? S"&!&#!is&si N&2S2O9 o'e( KIO9 N 1V 1
=
N 2V 2
6 Pee"%& +oefisie !is"#i$%si & )ee"%& +ose"#&si I 2 !&'&, &i#
N I 2 dalamair =
$ )ee"%& +ose"#&si I 2 !&'&, P
/ )ee"%& +oefisie !is"#i$%si
KD =
[ I 2 ]dalamPCE [ I 2 ]dalamair
=
(V . N ) Na2 S 2O3 V I 2 dalamair
(V . N ) Na2 S 2O3 V I dalamPCE 2
11 Pee"%& +os"&"& +ese"i,$&*& #e&+si (V . N ) Na S O &)ee"%& +ose"#&si I 2 !&'&, N &i# = 2
I 2 dalamair
I 2 dalamPCE =
(V . N ) Na2 S 2O3 V I 2 dalamPCE
N I dalamPCE
I 2 dalamair
3
V I 2 dalamair
$ )ee"%& +ose"#&si I 2 !&'&, P
2
2
=
KD
! )ee"%& I2 .&* $e#e&+si N I bereaksi 2
I 2 +
,7 #7 s7
− I
=
N I
2
dalamair
⇔
−
N I
I 3
2
dalamair *
−
[ I ] −
Kc
=
3
[ I 2 ][ I
−
]
Thank You
