Question 139
Activity 3.7.1: Watching diffusion. In this activity, you will observe the diffusion of a coloured solution in water. You will need: transparent container, such as a 200 cm³ (or larger) glass beaker; water; water-soluble ink or food dye; dropper pipette; glass tube or drinking straw. Method: 1 Fill the container with warm water. 2 Leave the container to stand for a few minutes so the water stops moving. 3 Use the dropper pipette to carefully add one or two drops of ink or food dye to the bottom of the container. Squeeze the top of the pipette gently so it does not squirt out into the water and start mixing. 4 Observe what happens.
Predict what would happen if the activity was repeated with water at a higher temperature.
Predict what would happen if the activity was repeated with water at a higher temperature.
