When you touch the food coloring at the edge of the plate, the color should move around, mix, and make cool designs. We used liquid dish detergent to make the colors move. But you could try some other ...

As you watch the salt water mix with the food coloring and move through the filter, what do you notice about the color? Are your results different than when you used water?

To Conduct Demonstration: Pour solution of blue food color into one test tube to a depth of 2". To one of the tubes containing the mixed solution, add two inches of hexane. Stopper with a cork and ...