Which of the following statements is (are) true for preciptate particles size? I

Question

Which of the following statements is (are) true for preciptate particles size?

I. particle size must be large enough to not clog or pass through a filter.

II. Particle size controlled by preciptation conditions.

III. Thermodynamics favors larger crystals because the surface atoms have higher energy than internal atoms and the fraction of atoms on the surface is smaller for larger crystals than smaller crystals.

IV. Ostwald ripening is the proceaa where smaller particles re-dissolve and larger cystals grow.

Explanation / Answer

The statements are true:

particle size must be large enough to not clog or pass through a filter.

Thermodynamics favors larger crystals because the surface atoms have higher energy than internal atoms and the fraction of atoms on the surface is smaller for larger crystals than smaller crystals.

Ostwald ripening is the proceaa where smaller particles re-dissolve and larger cystals grow.

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