Definition of ColloidIn Junior High Scholl we have classified substances into two main groups; those are pure substances and mixture. Pure substances consist of elements and compounds, while mixtures consist of solutions ... readmore
Brown MovementBrownian movement was first discovered by Robert Brown, a botanist, in 1827. He observed that pollen grains in water do not remain at rest but move about continuously and randomly. This random contin ... readmore
CoagulationCoagulation is the process by which a colloid precipitates out of a solution. The precipitation is brought about by induced aggregation. For example., an iron (III) hydroxide sol can be made to aggre ... readmore
Tyndall effect1. Tyndall effecta. DefinitionBritish physicists, John Tyndall succeeded in studying colloids and he found a phenomenon called the Tyndall effect. Tyndall effect is the scattering of light by colloid ... readmore
ElectrophoresisThe colloidal particles are electrically charged and they carry the same type of charge, that is, either the colloids are negatively charged or positively charged. The existence of charge on the coll ... readmore