Which of the following result, the chemist must have observed about his studies with KCl solution? — Surface Chemistry Chemistry Question

💡 Solution & Explanation

From concentrated solutions, the solute (KCl) is adsorbed on the blood charcoal surface, which is termed positive adsorption. Conversely, from dilute solutions, the solvent (water) is adsorbed preferentially, leading to an increase in solute concentration in the bulk, known as negative adsorption. Therefore, correct answer is D.