Page 56 - e-Module Berbasis Problem Based Learning pada Materi Koloid

K e g i a t a n B e l a j a r 2
K e g i a t a n B e l a j a r 2

P e r i s t i w a p e n g h i l a n g a n k e s t a b i l a n k o l o i d t e r s e b u t

d i k e n a l d e n g a n i s t i l a h k o a g u l a s i , s e d a n g k a n z a t y a n g

m e n y e b a b k a n k o a g u l a s i t e r j a d i d i s e b u t k o a g u l a n . C a r a

u n t u k m e n g h i l a n g k a n k e s t a b i l a n k o l o i d d i a n t a r a n y a

d e n g a n m e n a m b a h k a n z a t e l e k t r o l i t y a n g m u a t a n n y a

b e r b e d a a t a u k o l o i d y a n g m u a t a n n y a b e r b e d a .

Penerapan Koagulasi dalam Kehidupan

S i f a t k o l o i d y a n g d a p a t b e r k o a g u l a s i b a n y a k t e r j a d i

d a l a m k e h i d u p a n s e h a r i - h a r i d a n d i m a n f a a t k a n d a l a m
i n d u s t r i . B e r i k u t b e b e r a p a p e r i s t i w a y a n g d i a k i b a t k a n o l e h

k o a g u l a s i d a n i n d u s t r i y a n g m e m a n f a a t k a n s i f a t

k o a g u l a s i .

1. Pembentukan Delta di Muara Sungai

D e l t a a d a l a h d a e r a h y a n g b e r a d a d i a n t a r a l a u t d a n

s u n g a i . D e l t a t e r b e n t u k k a r e n a p e r i s t i w a k o a g u l a s i

a n t a r a k o l o i d t a n a h l i a t d a r i l u m p u r d e n g a n e l e k t r o l i t

d a r i a i r l a u t . M u a t a n n e g a t i f k o l o i d t a n a h l i a t a k a n
+
d i n e t r a l k a n o l e h e l e k t r o l i t p o s i t i f a i r l a u t , m i s a l n y a + ,
2 + 2 + 3 +
2 + , 2 + , 3 + . B e r i k u t i n i a d a l a h g a m b a r d e l t a :

Delta

Koloid

Sumber:
Essentials of Physical Chemistry & Observatory.nasa/delta

45