Enzyme catalysis colloidal state distinction between true solutions
Enzymes are complex nitrogenous substances these are actually protein molecules of higher molecular mass. Enzymes catalyse numerous reactions, especially those connected with natural processes. Numerous reactions occur in the bodies of animals and plants to maintain the life process. These reactions are catalysed by enzymes. The enzymes are thus, termed as bio-chemical catalysts and the phenomenon is known as bio-chemical catalysis.
Examples :
Starch, gelatin, gums, silicic acid and hdemoglobin etc.
A colloid, in chemistry, is a mixture in which one substance of microscopically dispersed insoluble particles is suspended throughout another substance. Sometimes the dispersed substance alone is called the colloid the term colloidal suspension refers unambiguously to the overall mixture (although a narrower sense of the word suspension is distinguished from colloids by larger particle size). Unlike a solution, whose solute and solvent constitute only one phase, a colloid has a dispersed phase (the suspended particles) and a continuous phase (the medium of suspension). To qualify as a colloid, the mixture must be one that does not settle or would take a very long time to settle appreciably.
Distinction between colloidal state and true solutions
| Colloid | True Solution |
|---|---|
| Colloids have particles smaller than those in suspensions and larger than those in solutions and range in size from 1 nm to 1000 nm. | Solution particles are smaller than 10-7cm or 1 nm |
| They do not settle out with time. | They do not settle out with time and remain stable. |
| Colloids allow light to pass through with some scattering. Tyndall effect is applicable | Light to pass freely through it without any interference. No Tyndall effect |
| Browning movement | No Browning movement |