Exprement Diffusion Process

Diffusion Process Experience

Materials :

a. Filter paper
b. Water or alcohol
c. Ink
d. Capillarity
e. Plastic glass

 Procedurs
1. Cut a filter paper in the size of 3 cm x 12 cm
2. Draw. a line in 2 cm from the paper’s corner in black ink or blue ink
3. Take a beaker glass or plastic glass, pour it with water about 1 cm high
4. Soak the paper in the water, with the line position above the water surface let it in 5 minutes and observe the changes
 Question Experiments :
a. What do you think about the picture
This is an experiment about difusion process. The picture show a methods or simple process that can intoduce about movement molecules (ink) in medium (water) through filter paper this known as capillarity action.

b. Make hipotesis base on picture
Rise or depression of a liquid in a small passage such as small cross-sectional area (filter paper that draw with ink) changes a movement of molecules (ink) through liquid suface because of kinetis or capillarity action. Water is drawn into the fibres of ink and caused ink movement or rise to vertical section. Molecules movements (ink) from high concentration medium (wet fibre or filter paper has draw with ink) to low concentration (filter paper soak with water or alcohol). Process diffusion in water show a rise or movements ink through a filter paper.

Conclusion

The ink in piece paper will spread up. It caused the difusion process. Process diffusion is a process spread up molecules liquid, solid or gases because of capillarity action or kinetis force. Kinetis force is force that caused attractive (linked) or refuse between molecules. Molecules movements (ink) from high concentration medium to low concentration (water show a rise or movements ink through a filter paper).

Capillarity or capillary action, phenomenon in which the surface of a liquid (water) is observed to be elevated or depressed changes of ink where it comes into contact with a solid (filter paper). Capillarity can be explained by considering the effects of two opposing forces: adhesion, the attractive (or repulsive) force between the molecules of the liquid and those of the container, and cohesion, the attractive force between the molecules of the liquid. Adhesion causes water to wet a glass container and thus causes the water's surface to rise near the container's walls in this experience as filter paper. If there were no forces acting in opposition, the water would creep higher and higher on the walls and eventually overflow the container. The forces of cohesion act to minimize the surface area of the liquid when the cohesive force acting to reduce the surface area becomes equal to the adhesive force acting to increase it (e.g., by pulling water up the walls of a glass), equilibrium is reached and the liquid stops rising where it contacts the solid. In some liquid-solid systems, e.g., mercury and glass or water and polyethylene plastic, the liquid does not wet the solid, and its surface is depressed where it contacts the solid. So capillarity is one of the causes of the upward flow of water in the soil and in plantswater is a substance composed of the chemical elements hydrogen and oxygen and existing in gaseous, liquid, and solid states. Water is one of the most plentiful and essential of compounds. It is vital to life, participating in virtually every process that occurs in plants and animals. Although the molecules of water are simple in structure (H2O), the physical and chemical properties.