Which of the following are techniques to promote particle growth? I. use a large

ID: 1059379 • Letter: W

Question

Which of the following are techniques to promote particle growth?

I. use a large volume of solution so concentrationof analyte and precipitant are low.

II. rapidly add the preciptant to preciptate all analyte from solution. then raise the temperature of the solution to promote crystal growth.

III. slowly adding preciptant with vigrous 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 preciptate and decrease supersaturation

A. III, IV

B. II, III, IV.

C. II, IV

D. I,II, III

E. I,III, IV

The techniques for the promotion of particle growth are

use a large volume of solution so concentrationof analyte and precipitant are low.

slowly adding preciptant with vigrous mixing as the precipitant is added to prevent a highly supersaturated condition in solution.

Raise the temperature of the solution to increase solubility of preciptate and decrease supersaturation

Option E is the correct answer

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