Question

Briefly explain the Sieverts’s law. Explain the factors affecting gas solubility in liquid metals and water. What is the difference between gas solubility in metals and water, explain the reason (both in solid and liquid state).

Answer 1

Sievert's law. It is rule in physical or metallurgy chemistry to predict the solubility of gas in metals. This law states that at constant temperature solubility of diatomic gas like hydrogen, nitrogen and oxygen is proportional to square root of partial pressure of the gas. Mathematically form of this law is given by C=K*(P) 10.5 Where C is concentration of gas dissolved in metal Pis pressure of partial pressure of gas at gas metal interface K is proportional constant Solubility: It is maximum amount of solute that can be dissolved in given amount of solvent at a particular temperature. The factors affecting solubility of Gas in liquid metal and water depends on temperature, pressure as well as the nature of solute and solvent. There are certain gases which dissolve readily in water whereas there are certain gases that do not dissolve in water under normal condition Oxygen is sparingly soluble in water whereas HCL and ammonia is readily soluble in water. 1. Temperature: Solubility of gas in liquid metal or water decreases as temperature increases. For example when temperature is very high than normal temperature the dissolved oxygen content present in lake or river will decreases. 2. Pressure: Increasing pressure will result in increasing solubility of gas. Also according to Henry's law solubility of gas is directly proportional to the pressure of gas above the liquid.