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P E R C C O O B A A N 4 T e r m o d i n a m i k a R e a k s i P e m b e n t u k a n I o n K o m p l e k F e S C N 2 +
A . T u j u a n M e n e n t u k a n k o n s ta n t a k e s e tim b a n g a n , p e m b e n t u k a n io n k o m p le k s B . T e o r i K im ia w a n s e la l u b e r h u b u n g a n d e n g a n k im ia . D e n g a n d a ta te r m o d in a m ik a s e p e r ti
d a ta - d a ta t e r m o d i n a m i k a d a la m b e b e r a p a r e a k s i e n e r g i b e b a s , e n t a l p i d a n e n t r o p i k i t a d a p a t
m e m p e l a j a r i s i f a t - s i f a t s u a t u r e a k s i k i m i a d a n m e m p r e d i k s i r e a k s i k i m i a y a n g a k a n t e r j a d i . H u b u n g a n p a r a m e t e r t e r m o d i n a m i k a d a l a m s u a t u r e a k s i d i n y a t a k a n s e b a g a i :
d a l a m k e a d a a n s e ti m b a n g s e m u a p a r a m e te r t e r m o d in a m i k a d a p a t d it e n tu k a n k e s e tim b a n g a n s e b a g a i fu n g s i s u h u . H u b u n g a n a n ta ra e n e rg y b e b a s k e s e t i m b a n g a n d i n y a t a k a n s e b a g a i :
b e r d a s a r k a n p o s i s i d e n g a n k o n s t a n t a
S e h i n g g a j i k a k i t a b i s a m e n e n t u k a n n i l a i k o n s t a n t a k e s e t i m b a n g a n s u a t u r e a k s i p a d a s u h u t e r t e n t u , m a k a e n e r g y b e b a s d a p a t d i t e n t u k a n . P l o t e n e r g i b e b a s s e b a g a i f u n g s i s u h u a k a n m e n d a p a t k a n g a r i s l u r u s u n t u k m e n e n t u k a n p a r a m e t e r t e r m o d i n a m i k a y a n g l a i n . R e a k s i p e m b e n t u k a n i o n k o m p l e k s R e a k s i k i m i a y a n g s e r in g d i g u n a k a n u n t u k m e m p e l a ja r i p r i n s i p k e s e i m b a n g a n te r m o d in a m ik a r e a k s i a d a la h r e a k s i p e m b e n tu k a n io n k o m p le k s . M is a ln y a p e m b e n tu k a n k o m p l e k s s e p e r t i r e a k s i b e r i k u t :
D a la m
k e s e t i m b a n g a n d i p e r o l e h :
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a h a y a ta m p a k . S a k u n in g , te ta p i u t i r e a k s i te r s e p r o d u k k o m p le e e r - L a m b e r t :
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k o m p l e k s F e S C N 2 + d a p a t
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n y a s e d ik t m e n ja d i f o to m e t e r a n g te rb e
it m e n y e r t id a k b e r c a h a y a n tu k . S e
a p w a ta m h in
m e c a h a rn a ). p a k g g a
n g a d s o r b s i p a n ja n g y a t a m p a k ( b i a s a n y a O l e h k a r e n a i i t u k i t a u n t u k m e n e n t u k a n k i t a b i s a g u n a k a n
= a b s o r b a n s i = k o n s t a n t a a b s o r s i v i t a s m o l a r
C . P r o s e 1 . A l a t d a . S b . E c . L d . P e . K f. T
d u r P e r c o b a a n a n b a h a n y a n g d i g u n a k a n p e k t r o n i k r l e n m e y e r 2 5 0 m L a b u t a k a r 2 5 0 m L i p e t u k u r 1 0 m L u v e t e r m o s t a t
g . h . i .
L a r u t a n H N O 3 L a r u t a n K S C N L a r u t a n F e ( N O 3 ) 3
2 . C a r a K e r j a a . A m b i l d e n g a n p i p e t 1 0 m L 0 , 0 5 M d a n m a s u k k a n k e d a l a m k u v e t . G u n a k a n l a r u t a n i n i s e b a g a i l a r u t a n b l a n k o . b . B u a t l a r u t a n d e n g a n k o m p o s i s i s e p e r t i p a d a t a b e l 2 . 1 , a d u k h i n g g a b e r c a m p u r d a n t e n t u k a n a b s o r b a n s i n y a . T a b e l 2 . 1 L a r u t a n s t a n d a r L a r u t a n K S C N 0 , 0 0 2 M 0 , 2 2 M 0 , 0 5 M 1 5 m L 5 m L 1 5 m L 2 4 m L 5 m L 1 6 m L 3 3 m L 5 m L 1 7 m L 4 2 m L 5 m L 1 8 m L 5 1 m L 5 m L 1 9 m L
c . d .
G u n a k a n d a B u a t la ru ta n T a b e l 2 . 2 L L a r u t a n 1 2 3 4 5
ta h d e a ru K S
a s il p e rc n g a n k o m ta n p e rc o C N 0 , 0 0 1 m L 2 m L 3 m L 4 m L 5 m L
o b a a n p a d a c a r a k e r ja b u n t u k m e m p o s is i s e p e rti p a d a ta b e l 2 . 2 , a d u k b a a n 2 M 0 , 0 0 2 M 0 5 m L 5 m L 5 m L 5 m L 5 m L
L a k u k a n p e n g u k u r a n a b s o r b a n s i p a d a te m p e r a tu r C C . P e n g o l l a h a n d a t a d a n p e r h i t u n g a n 1 . T e n tu k a n k o n s e n t ra s i la ru t a n + M u l a m u l a : (x m o l) (y B e r e a k s i (x - y m o l) (y : S e t i m b a n g : (z m o l) (0
S e h i n g g a [ ] = [ ]
b u a t k u r v a k a l i b r a s i . h i n g g a b e r c a m p u r . , 0 5 M 4 m L 3 m L 2 m L 1 m L 0 m L
m a s i n g - m a s i n g l a r u t a n .
s t a n d a r m e n g g u n a k a n s t o i k i o m e t r i r e a k s i . m o l) m o l) m o l)
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2 . 3 .
4 . 5 .
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S G m H m
e h in u n a a s in itu n a s in
g g a k a n g la g la h g la
m e n j a d i = p e r s a m a a n k o n s e n t r a s i p a d a l a n g k a h 2 u n t u k m e n e n t u k a n k o n s e n tr a s i m a s i n g - r u t a n u n t u k s u h u 2 5 ˚ C , 2 0 ˚ C , 1 5 ˚ C , 1 0 ˚ C d a n 5 ˚ C . k o n s t a n t a k e s e t i m b a n g a n u n t u k s u h u 2 5 ˚ C , 2 0 ˚ C , 1 5 ˚ C , 1 0 ˚ C d a n 5 ˚ C m a s i n g - r u t a n .
6 . D a r i d a t a k o n s t a n t a k e s e t i m b a n g a n t e n t u k a n m a s i n g - m a s i n g s u h u . 7 . G a m b a r k a n g r a f i k
s e b a g a i s u m b u Y
v e rs u s
s e b a g a i s u m b u X
u n tu k m e n e n tu k a n
S e h i n g g a D . D a t a p e r c o b a a n 1 . T a b e l D . 1 D a t a k o n s e n t r a s i d a n a b s o r b a n s i l a r u t a n s t a n d a r L a r u t a n 1 2 3 4 5
2 . T a b e l D . 2 D a ta a b s o r b a n s i v a r ia s i te m p e L a r u ta n T e m p e 1 2 2 1 1 2
3
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