Question

Which statement about crystal growth is correct?

Crystal growth is important to the formation of an easily filterable, pure, solid substance most suitable for gravimetric analysis. Which of the following is used to promote crystal growth?

Using the most dilute solutions, as practical, to allow relatively slow crystal growth.

Continual agitation or scratching of the vessel surface to induce nucleation.

Maintaining a low solution temperature, to slow the movement of the ions which combine to form the precipitated substance.

Rapid addition of a concentrated precipitant to increase the rate of nucleation.

Answer 1

For crystal growth we due continues agitation or we scratch the vessel inner surface to induce nucleation. And also we maintain a low solution temperature to slow the movement of ions which combine to form the precipitate of substance.

Thus following two statements are correct about crystal growth: "continues agitation or scratching of the vessel surface to induce nucleation.

Maintaining a low solution temperature, to slow the movement of the ions which combine to form the precipitated substance."