7/26/2019 larutan 55-58

1/5

SOAL : 1 (Lanjutan)

% - etanol P1g ml-1 V ml g -1

0 0.997 1.003

10 0.980 1.020

20 0.966 1.035

30 0.951 1.052

40 0.932 1.073

50 0.910 1.099

60 0.887 1.127

70 0.863 1.159

80 0.839 1.192

90 0.813 1.230

100 0.785 1.274

Alurkan tera!a" #rak$ &a$a etanol'

e'ke&u!an tark ar$ $nun "a!a

e

0'5 (lat ra#k).

7/26/2019 larutan 55-58

2/5

Larutan n - "ro"anol !an ar "a!a 25*+ :

("elarut n , "ro"anol)

Xprop(= X1) Pprop(=P1) PH2O(=P2) i = i Xi

0 0 23'76

ek. a" !ala& tar. 0'02 5'05 23'5 1 =

P

P

0'05 10'8 23'2

0'10 13'2 22'7 2 =

P

K

0'20 13'6 21'8

0'40 14'2 21'7 K2 =lim

X0

P

X

0'60 15'5 19'9

0'80 17'8 13'4

0'90 19'4 8'13

0'95 20'8 4'20

1'/ 21'76 0'00

!tanakan : oe#$en keakt"an n- "ro"anol' 1 ..

oe#$en keakt"an ar'2 ..

a!a #rak$ &ol n-"ro"anol : 0'20 0'40 0'60 0'80

1 = 1X1 =

P

P 1 =

P

XP problema standar

2= 2X2 =

P

K 2=

P

XP

K = lim

X0

P

X alurkanP

K terhadap X2, kemudian ekstrapolasi hingga X2= 0 (lihat

graik pada halaman berikut) K= !!,"

7/26/2019 larutan 55-58

3/5

P#1 = 21,$%

K2 = !!,"

1=

13.6

0.20x 21.76 ( pd & X1 = 0&20 ) dst& 1= '&12 ( pd & X1= 0&20 )

2=

21.8

0.80x 88.5 ( pd & X1 = 0&20 ) dst&

2= 0&'0! ( pd & X2= 0&20)

Hasil lengkap -

SOAL : 2 (lanjutan)

ata untuk ra#kP

K tera!a"X2:

X2 ( = XHO) P2( = PHO) P

K

0.05 4.20 84.0

- 8.13 81.3

0.28 - 67.0

- - 49.8

- - 36.2

- 21.8 27.2

0.90 22.7 25.2

X1 1 2

0&2

0

'&1

2

0&'0

!

0&

0

1&%

'

0&0

*

0&%

0

1&1

*

0&"%

2

0&!

0

1&0

2

0&$"

$

7/26/2019 larutan 55-58

4/5

Larutan $ukro$a' +1222 O11' !ala& ar :

& (&olal) : 0'10 0'20 0'50 1'00 2'00

1 (lar)

*1(ar) + n

1

b : 0'188 0'380 0'980 2'060 4'600

1 ($)

*1($)

Kb air = 1&!% e$et&. :

1(lar)

1($)

!tanakan : (a) keakt"an' 1 ..(GT)T

= H

T

() koe#$en keakt"an' 1 .. K =

RT M

1000 Hm ( "er$ 5&66 )

1 (lar) 1($)

1 (lar)

*1(ar) + n

1

1 (ar) + n

1 *1($) n 1 =

1 ( s) 1(cair)RT

= Gm

RT

T -

(GmRT)T

d

-1

R [ (Gm

T )T

] d = HmRT d

7/26/2019 larutan 55-58

5/5

d

T

THm

RT d - n = Hm

R (TT

TT) =Hm

R T b

T

arenaK =

RT M

1000 Hm, maka

Hm

RT =

M

1000K b

Su$ttu$ :n = -M

1000 K b T "role&a $tan!ar

& 0'10 . 0'188 n - 0'001819 0'9982

n = -18

1000x1.86 0'188 & .b

!$t. 0'10 0'188 0'9982

0'20 0'380 0'9963

0'50 0'980 0'9906

1'00 2'060 0'9803

2'00 4'600 0'9565