Category: Ch 5 – Surface Chemistry

Colloids (also known as colloidal solutions or colloidal systems) are mixtures in which microscopically dispersed insoluble particles of one substance are suspended in another substance. The size of the suspended particles in a colloid can range from 1 to 1000 nanometres (10-9 metres). For a mixture to be classified as a colloid, its suspended particles must… Continue reading Colloids

What is Catalysis? All reactants need to overcome certain energy, better known as activation energy in order to form products. This activation energy is the difference between the energy of transition state and the reactant species. Some reactant molecules have enough kinetic energy to overcome this energy barrier whereas others don’t. Hence, not all the reactions happen… Continue reading Catalysis

Adsorption The term adsorption was first coined in 1881 by a German physicist named Heinrich Kayser. Adsorption is often described as a surface phenomenon where particles are attached to the top layer of material. It normally involves the molecules, atoms or even ions of a gas, liquid or solid in a dissolved state that is attached to the… Continue reading Surface Chemistry