colloid, Chemistry

Assignment Help:
what are the classification of colloids ?

Related Discussions:- colloid

Chemical bonding, When NaCl is dissolved in water, the sodium ion become

When NaCl is dissolved in water, the sodium ion become

Nitrogen, why nitrogen act as inert gas

why nitrogen act as inert gas

Phylum Protozoa, 1. Write an easy on the classification of Phylum Protozoa,...

1. Write an easy on the classification of Phylum Protozoa, a large phylum comprising approximately 50,000 species. (10marks)

Two similar non-metallic atoms, The electron pair which forms a bond betwee...

The electron pair which forms a bond between two similar non-metallic atoms will be: (1) Dissimilar shared between the two (2) By complete transfer from one atom to other

Maximum number of unpaired electrons, Which of the following metal ions wil...

Which of the following metal ions will have maximum number of unpaired electrons: (1) Fe +2                                (2) Co +2                        (3) Ni +2

Discuss the ion exchange process of water softening, Discuss the ion exchan...

Discuss the ion exchange process of water softening. Give an account of the variety of mechanisms of Lubrication. Write notes on bulk and solution polymerization techniques.

Clark''s method or soap titration method, CLARK'S METHOD OR SOAP TITRATION ...

CLARK'S METHOD OR SOAP TITRATION METHOD: This method depends upon the fact that when soluble soap is added to hard water, constituent of hard water. Ca, Mg and other heavy metals

What are primary cells and explain its reactions?, This type of cells becom...

This type of cells becomes dead over a period of time and the chemical reaction stops. They cannot be revitalized or used again. Some ordinary examples are dry cell, mercury cell,

Organic chemistry, why is soda lime used instead of plain NaOH in preparati...

why is soda lime used instead of plain NaOH in preparation of methane?( for class 10)

Nelson

1/12/2013 10:01:15 PM

Colloids are classified as two types which are the lyophilic / reversible and lyophobic / irreversible. If water is the dispersion medium, then the term used are hydrophilic and hydrophobic.

Lyophilic colloids: A colloidal system which may be constructed readily by simple warming or shaking the substance in a suitable solvent is called as lyophilic colloid. Substances that form lyophilic colloids involves gelatin, starch, and rubber, proteins, gum. Lyophilic colloids are also named as reversible colloids as on evaporating the dispersion medium such as water, the substance or the residue may be again reconverted into colloidal state simply by addition of the liquid i.e. water. These solutions are reasonably stable and usually cannot be easily precipitated.

Lyophobic colloids: colloids constructed with difficulty are termed as lyophobic colloids. These colloids are constructed by substances such as As2S3 , Fe(OH)3, gold and other metals that are sparingly soluble and thus their molecules do not pass readily into colloidal state. Lyophobic colloids are called as irreversible colloids since the residue cannot readily be reconverted into sol by ordinary means. These solutions are quite readily precipitated and hence they are not stable.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd