Answer: converting a precipitate into a colloidal sol.
- A removing ionic impurities by diffusion
- B scattering of light by particles
- C converting a precipitate into a colloidal sol
- D settling of colloidal particles
Correct answer: C. converting a precipitate into a colloidal sol
Explanation: Peptization is the conversion of a fresh precipitate into a colloidal sol by adding a suitable electrolyte (the peptizing agent).
A typical adsorption isotherm: x/m (mass adsorbed per gram of adsorbent) rises steeply at low pressure, then flattens into a saturation plateau as the adsorbent surface fills up.
Concept context
Explore the chemistry that happens at interfaces, from catalysts that speed up industrial reactions to colloids like milk, smoke, and gels that surround us every day.