Theoritical principles in qualitative analysis (Hydrogen Sulphide scheme)
Theoritical principles in qualitative analysis (Hydrogen Sulphide scheme) Solubility and Solubility Product : The maximum amount of solute that can be dissolved in a definite amount of solvent at a particular temperature is called the solubility. For example the solubility of NaCl in water is 0.359 g/ml or simply 35.9 g/100ml at 25 degree centigrade and that of AgCl in water is only 520 micro gram/100 g at 50 degree centigrade. Thus we say AgCl is a sparingly soluble salt as it is soluble to a very less extent. Consider the solubility of AgCl, at 50 degree centigrade , It ionises in water as follows: AgCl (s) ⇌ Ag + + Cl - AgCl (s) stands here for solid AgCl Applying the law of chemical equilibium, K = [Ag + ] . [Cl - ] / [AgCl (s)] ---------- equation 1 Since AgCl is sparingly soluble (d...