colloid, Chemistry

Assignment Help:
what are the classification of colloids ?

Related Discussions:- colloid

Non-electrolyte solutions, NON-ELECTROLYTE SOLUTIONS Composition: ...

NON-ELECTROLYTE SOLUTIONS Composition: A solution is a mixture of two or more substance; this consists of one or more minority substances, the solute(s), dispersed in a ma

Explain the hydrogenation, Which of the following rate equations is correct...

Which of the following rate equations is correct, if the hydrogenation of  the adsorbed intermediate is the slowest step of the reaction?   When zinc oxide is used as

Covalent bonding, Covalent Bond Purely electrostatic attractions between...

Covalent Bond Purely electrostatic attractions between ions are nondirectional, but with increasing covalent character the directional properties of valence orbitals become more

Oxidation and reduction, Which of the following reduces the activation ener...

Which of the following reduces the activation energy of a chemical reaction?

Why nh3+ does not form complex compounds, IN AMMONIUM ION NITROGEN DOESNT H...

IN AMMONIUM ION NITROGEN DOESNT HAVE VALENCE ELECTRONS IN ITS VALENCE ORBITAL.

Iodoform, what is reaction for propanone in iodoform test

what is reaction for propanone in iodoform test

Physical properties of tri-halides, Physical properties of Tri-halides ...

Physical properties of Tri-halides (i) Tri-halides is a sweet smelling colourless liquid. (ii) Tri-halides is heavy liquid. The density of it is 1.485. It boils at 61°C.

What is banana bond, What is Banana bond? Diborane contains how many banana...

What is Banana bond? Diborane contains how many banana bonds Ans) In Diborane B-H-B, bridge, which is produced by the sharing of two electrons, is known as banana bond or Tau bo

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