Question

Obtain some red or blue liquid food coloring from your kitchen. Prepare two glasses or transparent plastic cups containing equal amounts of water, one drawn from the cold tap and the other drawn from the hot tap. Drop one drop of food coloring into each cup and observe what happens. (Do not stir once the food coloring has been added.)

a. Describe the changes that take place over several minute in time until the food coloring is well dispersed in both cups. what differences do you note between the cups with cold and hot water?

b. Develop and explanation for your observatious. Do they suggest the presence of tiny particles such as molecules or atoms?

Answer 1

if u have taken the red colured food colouring liquid, and dropped a few drops to the hot and cold water containers, u will notice that the red colour liquid in hot water diffuse quickly rather than red colour in cold water,. this is because the samlple particles moves and vibrates faster and harder when they were in warm water. The hot water molecules stuck the sample red colouring particles frequently andscattering them until the container(cup or glass) reached a homogeneous solution phase.the diffusion rate will be more in hot water, hence spread over fastly. The diffusion can be effected by the shape of container also( brownian mechanism of diffusion)