colloid, Chemistry

Assignment Help:
what are the classification of colloids ?

Related Discussions:- colloid

Polarity and salvation, Polarity and salvation   A solvent is a liqu...

Polarity and salvation   A solvent is a liquid medium in which dissolved are known as solutes. Solvents are useful for storing species that would otherwise be in inconvenien

Velocity constant, comprision between velocity constant constant

comprision between velocity constant constant

An atom with atomic number, An atom with atomic number 20 is most likely to...

An atom with atomic number 20 is most likely to combine chemically with the atom whose atomic number is: (1) 11         (2) 14      (3) 16                 (4) 10 An

Configuration, how to solve equations using p-block configuration

how to solve equations using p-block configuration

Evaluate percentage fat content in milk, Q. Evaluate percentage Fat Content...

Q. Evaluate percentage Fat Content in Milk? The fat content in milk can be determined through various procedures as: Direct determination of fat by extraction with ether - A

Hypothesis on chlorofluorocarbon, Q. Hypothesis on chlorofluorocarbon? ...

Q. Hypothesis on chlorofluorocarbon? A hypothesis is a probable explanation for what has been observed. Based on the explanation of ozone thinning and CFC build-up in the chemi

Physical properties of phenol, Physical properties of Phenol (a) Phenol...

Physical properties of Phenol (a) Phenol is a colorless crystalline, deliquescent solid. It attains pink colour on exposure to air and light. (b) Phenol is capable of formin

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