Question

Question 18

Answer 1

Answer:

The change of surface area does not affect the speed of dissolving.  Hence the correct answer is option D.

Explanation:

Temperature has an effect on dissolving speed of the solute. If the temperature is raised high then dissolving rate becomes high and if the temperature is low the dissolving speed become slow. Steering also helps in increasing the dissolving speed of the solute.

Insulated container also allows to increase the temperature of dissolving the solute into the solvent. But the surface area is only a phenomenon which does not affect the rate of dissolving of a solute. Therefore, we can see that surface area has no effect on the dissolving speed.

Answer 2

Answer:

Insulated container

Explanation:

The insulated container, keeps aislated  what it holds. It´s purpose is to preserve, and avoid in some cases temperature change. This type of containers also are helpful when you need to transport or storage sensitive materials.