colloid, Chemistry

Assignment Help:
what are the classification of colloids ?

Related Discussions:- colloid

Show properties of the borax, Q. Show properties of the Borax? Salts o...

Q. Show properties of the Borax? Salts of boric acids are known as borates. As said earlier, hydrated borates occur naturally, e.g., borax, Na 2 B 6 0 11 . 5H 2 0, kernite, Na

Atmospheric pressure, An open test tube at 293 K is filled at the bottom wi...

An open test tube at 293 K is filled at the bottom with 24.2 cm of Hg, and 11.2 cm of water is placed above the Hg.  Calculate the pressure at the bottom of the test tube if the at

Poisnous gases released during burning of the plastic , What are the major ...

What are the major poisnous gases released during burning of the plastic substances? Ans) It is high time that we start taking concrete steps in order to prevent pollution or else

#titlespontaneous and non spontaneous reactions, give me assigment of spont...

give me assigment of spontaneous and non spontaneous reactions

Ozone, trailing of mercury

trailing of mercury

Soaps - oils and fats, Soaps - Oils and fats Soaps are the metallic sal...

Soaps - Oils and fats Soaps are the metallic salts of higher fatty acids like stearic, palmitic, oleic, etc. The potassium and sodium salts are the common soaps that are solubl

Borazine, short note on borazine

short note on borazine

Moist silver oxide or dry silver oxide, Ethyl bromide can be converted into...

Ethyl bromide can be converted into ethyl alcohol using- Moist silver oxide or dry silver oxide?

Correct relationship between wavelength momentum of particle, Which is the ...

Which is the correct relationship between wavelength and momentum of particles: (1) γ= h/ p                  (2) Π h/ p    (3) p= h/ γ (4) h= p/ γ Ans: γ= h/ p

Describe a method that used to separate the components, Describe a method t...

Describe a method that could be used to separate the components of the following a) Sand and iron filings b) Sawdust and lead pellets c) Salt and glass particles d) Silt (water and

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