Application of colloids
(1) Purification of the water by alum (coagulation) : Alum which yield Al+3 ions, is added to water to coagulate the negatively charged clay particles.
(2) In rubber and tanning industry (coagulation and mutual coagulation) : Several industrial processes such as dyeing, chrome tanning, lubrication rubber plating, etc are of colloidal nature
(i) In rubber platting, the negatively charged particles of rubber (latex) are made to deposit on the wires or handle of various tools by means of electrophoresis. Article on which rubber is to be deposited is made as anode.
(ii) In tanning positively charged colloidal particles of hides and leather are coagulated by impregnating them, in the negatively charged tanning materials (in the barks of trees). Out of the tanning agent chromium salts are most commonly used for the coagulation of the hide material and the process is called chrome tanning.
(3) Artificial rains: It is possible to cause artificial rain by throwing the electrified sand or silver iodide from an aeroplane and thus coagulating the mist hanging in air.
(4) Smoke precipitation (Coagulation) : Smoke is a negative sol consisting of carbon particles dispersed in air. Therefore, these particles are removed by passing through a chamber provided with highly positively charged metallic knob.
(5) Formation of deltas (coagulation) : River water consists of negatively charged clay particles of colloidal dimension. At the time when river falls into the sea, the clay particles can be coagulated by the positive ions etc. present in sea water and new lands called deltas are formed.
(6) Clot formation : Blood consists of negatively charged colloidal particles (such as albuminoid substance). The colloidal nature of the blood explains why bleeding stops by applying the ferric chloride solution to wound. In fact ferric chloride solution causes coagulation of blood to form a clot which stops further bleeding.
(7) Colloidal medicine : The Argyrol and protargyrol are the colloidal solution of silver and are used as eye lotions colloidal sulphur is used as disinfectant colloidal gold, calcium and iron are used as tonics.
(8) Coating of Photographic plates: These are thin glass plates coated with gelatin containing a fine suspension of silver bromide. Particles of the silver bromide are colloidal in nature.
Email based Chemistry assignment help - homework help at Expertsmind
Are you searching chemistry expert for help with Application of colloids questions? Application of colloids topic is not easier to learn without external help? We at www.expertsmind.com offer finest service of Chemistry assignment help and chemistry homework help. Live tutors are available for 24x7 hours helping students in their Application of colloids related problems. We provide step by step Application of colloids question's answers with 100% plagiarism free content. We prepare quality content and notes for Application of colloids topic under chemistry theory and study material. These are avail for subscribed users and they can get advantages anytime.
Why Expertsmind for assignment help
- Higher degree holder and experienced experts network
- Punctuality and responsibility of work
- Quality solution with 100% plagiarism free answers
- Time on Delivery
- Privacy of information and details
- Excellence in solving chemistry queries in excels and word format.
- Best tutoring assistance 24x7 hours