Question

23. A student performs an activity in which a soluble colored substance is dropped in a beaker filled with water, as shown in the figure.

Which statement explains why the water in the beaker is a uniform color after a period of time?

A. The molecules of the colored substance move randomly through the water, with the majority moving from an area of high concentration to an area of low concentration.

B. The water molecules are altered and replaced by the molecules of the colored substance.

C. The molecules of the colored substance move randomly through the water, with the majority moving from an area of low concentration to an area of high concentration.

D. The colored substance molecules are altered and replaced by the molecules of the water.

Answer 1

The molecules of the colored dotty thing move through the water to reach equilibrium from high concentrations to low concentrations

Answer 2

Answer: A. The molecules of the colored substance move randomly through the water, with the majority moving from an area of high concentration to an area of low concentration.

Explanation: When a substance is dissolved in water or any other substance, the molecules will move to an area they have not. When food coloring is placed in water, it moves to areas it hasn't touched because it has to expand.