Which of the following is a reasonable explanation for the effect that stirring or agitation has on the dissolution rate?


A.
The water molecules have more kinetic energy and have a greater chance of interacting with (and dissolving) the potassium iodide.


B.
The water molecules have an increased charge, since stirring removes electrons from the molecules. This increases the chance of a potassium ion being attracted to water.


C.
Stirring converts large amounts of energy into heat from friction and the heat increases the dissolution rate.


D.
Stirring breaks the bonds between water molecules so that they are free to bond with the potassium and iodine ions.

Respuesta :

The water molecules have more kinetic energy and have a greater chance of interacting with (and dissolving) the potassium iodide.

What is the effect of stirring on the dissolution rate?

Stirring breaks a solute into smaller pieces which increases its surface area as well as its rate of dissolution. Stirring brings unused portions of the solvent in contact with the solute which allows the solute to dissolve faster.

So we can conclude that option A is the right answer.

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