colloid, Chemistry

Assignment Help:
what are the classification of colloids ?

Related Discussions:- colloid

Two dimensional potential , A particle is in the two dimensional potential ...

A particle is in the two dimensional potential well (V(x,y) =  ∞ for the outside of the well, V(x,y) = 0 for the inside of the well. (a)  Starting with the shrodinger equation,

Calculate de-broglie wavelength of an electron travelling, Calculate de-Bro...

Calculate de-Broglie wavelength of an electron travelling at 1% of the speed of light: (1) 2.73 x 10- 24                (2)  2.42 x 10 -10 (3)  242.2x 10- 10

Sources of errore in thermogravimetry, plz can you send me or give me data ...

plz can you send me or give me data about my assignment topic which is mentioned above in title.it consist of 5 pages and only 5 sources are discussed in detail

Biomarker, definition and classes of biomarkers

definition and classes of biomarkers

Vulcanization of rubber, Vulcanization: Vulcanization is very widely used ...

Vulcanization: Vulcanization is very widely used in rubber technology to improve the properties such as low tensile strength, plastic nature, thickness etc. by adding some chemica

Rubber - polymer, Rubber - polymer It is a polymer that is able of retu...

Rubber - polymer It is a polymer that is able of returning to its original size, shape or length later than being deformed or stretched. It a kind of elastomer. Rubber is of tw

Evaluate the entropy change, A house is air conditioned using solar energy....

A house is air conditioned using solar energy.  Solar radiation heats a pressurized tank such that the temperature is maintained at 175 o C.  1500 kJ must be extracted from the hou

.Dienes, Physical properties of dienes

Physical properties of dienes

P block, why ionisation energy of aluminium is greater then Ga?

why ionisation energy of aluminium is greater then Ga?

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