Which of the following are techniques to promote particle growth?
I Use a large volume of solution so concentration of analyte and precipitant are low.
II Rapidly add the precipitant to precipitate all analyte from solution,then raise the temperature of the solution to promote crystal growth.
III Slowly adding precipitant with vigorous mixing as the precipitant is added to prevent a highly supersaturated condition in solution.
IV Raise the temperature of the solution to increase solubility of precipitate and decrease supersaturation.
A)III and IV
B)II,III,and IV
C)II and IV
D)I,II,and III
E)I,III,and IV

Question

Quizplus · Accepted Answer

Techniques to promote particle growth include using a large volume of solution to keep concentrations low (I), slowly adding precipitant with vigorous mixing to prevent supersaturation (III), and raising the temperature to increase solubility and decrease supersaturation (IV). These methods help in achieving larger, more uniform particles by controlling the rate of nucleation and growth. Rapid addition of precipitant (II) typically leads to smaller particles due to rapid nucleation, which is not conducive to particle growth.

Which of the Following Are Techniques to Promote Particle Growth