When beaker with salt water and blue food colouring mixed with beaker with fresh water and yellow food colouring and the mixture blown across the surface.Does the zone of mixing become thicker or thinner after blowing across the surface? Why would you expect this?

Answer 1

The zone of mixing would become thicker after blowing across the surface. This is because when the concentrated salt water and blue food coloring mixes with the fresh water and yellow food coloring, the heavier, denser salt water solution will sink below the lighter fresh water solution. When the mixture is blown across the surface, the denser solution will spread out and mix with the fresh water, creating a larger and thicker zone of mixing.