Colloids And Suspensions Lab Report

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Colloids And Suspensions
ADITYA MAAN (14045007), GAURAV BARAK (14045032), MANOJ DHAKER (14045052)

INTRODUCTION A colloid is a substance which is microscopically dispersed throughout another substance. The word colloid comes from Greek word kolla, meaning glue thus colloidal particles are glue like substances. Colloidal particles pass through filter paper but not through a semipermeable membrane. Colloids can be made settle by centrifugation. Molecules of a hydrophilic colloid have an affinity for water molecules and thus when they are dispersed in water they become hydrated. Hydrated colloids swell and increase the viscosity of the system, thereby improving stability by reducing the interaction between particles and their tendency to settle. A
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2AuCl3 + 3SnCl2 → 3SnCl4 +
2Au
c) Hydrolysis:
It is the break down of water. Sols of ferric hydroxide and aluminium hydroxide can be prepared by boiling the aqueous solution of the corresponding chlorides. for example.
FeCl3 + 3H2S → Fe(OH)3 + 3HCl
In milk, the colloidal suspension of the fats prevents the milk from being thick, and allows for easy absorption of the nutrients.



Sewage water contains particles of dirt, mud etc. which are colloidal in nature and carry some electrical charge. These particles may be removed by using the phenomenon of electrophoresis. The sky is the empty space around earth and as such has no colour. It appears blue due to the scattering of light by the colloidal dust particles present in air (Tyndall effect).
Readily excreted by renal mechanisms.
The sugar present in milk produces lactic acid on fermentation. Ions produced by acid, destroy the charge on the colloidal particles present in milk, which then coagulate and separate as curd. Soap solution is colloidal in nature. It removes the dirt particles either by adsorption or by emulsifying the greasy matter sticking to the

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