colloid, Chemistry

Assignment Help:
what are the classification of colloids ?

Related Discussions:- colloid

Born haber cycle, Born Haber cycle with example as sodium chloride

Born Haber cycle with example as sodium chloride

Origin of charge on colloidal sol, Colloids are either positively charged o...

Colloids are either positively charged or negatively charged. But What are the various factors responsible for charge on the colloidal sols?

An element has the electronic configuration, An element has the electronic ...

An element has the electronic configuration 1s 2 , 2s 2, 2p 6 , 3s 2 , 3p 2 . Its valency electrons are: (1) 6        (2) 2         (3) 3       (4)4 Ans: 4

Determine nitrogen has the electronic configuration, Nitrogen has the elect...

Nitrogen has the electronic configuration  1s 2 , 2s 2 , 2p 1 x , 2p 1 y , 2 p 1 z   and not 1s 2 , 2s 2 , 2p 2 x , 2p 1 y , 2 p 0 z      which is determined by: (1) Aufb

Which one pair of atoms or ions will have same configuration, Which one pai...

Which one pair of atoms or ions will have same configuration: (1) F + ans Ne      (2)  Li + He -       (3) C l - and Ar            (4) Na and K Ans: Cl - an

Explain the concept of environmental impact assessment, Question: (i) ...

Question: (i) Explain the concept of Environmental Impact Assessment (EIA) and state its main objectives. (ii) List 3 activities (from the marine sector) which require an

S block , reason behind the diganol relationship of lithium and magnishim

reason behind the diganol relationship of lithium and magnishim

P-block, formula for producer gas

formula for producer gas

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