Experiment: warm water on top of warm water,what would happen?

Question

If in a bottle there is warm water with red food coloring, and in another bottle there is warm water and no food coloring, what will happen to the warm water with the food coloring when the warm water without coloring is placed on it upside down? Will it rise and mix with the non colored one and become orange or will nothing happen and they both stay the same with no mixing?

Answer 1

Let's say you manage to layer the two waters (A + B) without disturbing them. (I would like to see that though).
The color will slowly mix meaning the color molecules will start diffusing until they are evenly distributed in the vessel leaving the solution less intense than the initial colored water.

Now for the water, will water A mix with water B? probably. But unless you could tag the molecules without changing their properties we will never know for sure.

Answer 2

In theory they should mix due to diffusion (the molecules of all liquids and gases are randomly flying around smacking into the sides of the container, some will make it out the top of the lower bottle).

I would expect this to be pretty slow, and another factor is that the density of the water with the food coloring would be slightly heavier than the clear water, so there would be a tendency for it to stay in the bottom.

Answer 3

If you are able to place the two together without pouring, what you would see is a gentle mingling of the colors at first but only at the point where the two bodies meet. This would be cause by the divider being removed. However, since the food coloring is heavier it would therefore return to the bottom once the water is allowed to sit.

Answer 4

I did something like this in my science class, but both waters will mix-try pouring oil.

Answer 5

They'll mix together, diluting the red to a lighter red.

Answer 6

why dont you mix them together and find out
this is not a costly experiment
but i think the color would go more pink than anything