Unit 5 Surface Chemistry (Intext Questions-3)-Deleted
Intext Questions
5.7 What modification can you suggest in the Hardy Schulze law?
Answer Hardy-Schulze law states that ’the greater the valence of the flocculating ion added, the greater is its power to cause precipitation.' This law takes into consideration only the charge carried by an ion, not its size. The smaller the size of an ion, the more will be its polarising power. Thus, Hardy-Schulze law can be modified in terms of the polarising power of the flocculating ion. Thus, the modified Hardy-Schulze law can be stated as ’the greater the polarising power of the flocculating ion added, the greater is its power to cause precipitation.'Show Answer
Show Answer
Answer
When a substance gets precipitated, some ions that combine to form the precipitate get adsorbed on the surface of the precipitate. Therefore, it becomes important to wash the precipitate before estimating it quantitatively in order to remove these adsorbed ions or other such impurities.
