- Increase in pressure increases the solubility of gases. At a given temperature, the mass of gas dissolved in a fixed volume of liquid is directly proportional to the pressure of the gas on the surface of the liquid. This is called Henry’s Law.
- Whenever gases react, they do so in volumes which bear a simple ratio to one another, and to the volumes of the gaseous products, provided, all the volumes are measured under the same conditions of temperature and pressure. This is called Gay-Lussac’s Law of combining volumes of gases.
- Equal volumes of all gases under the same conditions of temperature and pressure contain the equal number of molecules. This is called Avogadro’s Law.
- Modern Periodic Law states that “the physical and chemical properties of elements are the periodic function of their atomic numbers.”