The purpose of this experiment is to study the effect of changing the concentration of sodium chloride solution on the rate of osmosis in potato tubes. This was maintained by using equal measures of the potato tubes and applying them in the different concentrations of sodium chloride, 0%, 2%, 5%, 10%, 20% and 26%, in beakers, then measuring the change in mass of the potato. tubes then. The time required for all potato tubes to be placed in solution was 15 minutes. Can the concentration gradient of the sodium chloride solution influence the rate of osmotic diffusion experienced by the potato tubes? Osmosis is a type of diffusion that applies only to water and is a passive process that does not require energy input from the cell. ; This is because materials move with the concentration gradient. Osmosis is a process that occurs at the cellular level, which involves the spontaneous net movement of water across a selectively permeable membrane, from a region of high to low water concentration, in order to equalize the water level. water in each region. This form of diffusion occurs when molecules in high concentration are too large to pass through the membrane. The term semi-permeable or selectively permeable means that some substances can easily pass through the cell membrane, while others cannot. The importance of osmosis for cells is great, since it is osmotic pressure that maintains the shape of an animal cell and provides support to plant cells. Many factors affect the rate of osmosis, including particle size and temperature. However, in this particular experiment, the factor studied is the concentration of sodium chloride. Potato tubes will be used to demonstrate the fact...... middle of paper ......th variation in data collection. This event can be explained by the process of osmosis. The increase in mass as well as the increase in turgor, in potato tubes immersed in low concentration solutions of sodium chloride, are considered hypertonic. The solution being hypertonic, the water molecules will diffuse into the area of ​​lowest water concentration (the potato tube) in order to reach equilibrium. Alternatively, the decrease in mass of the potato tube immersed in highly concentrated sodium chloride solutions can be explained by its immersion in a hypotonic solution. As the sodium chloride solution is less concentrated in water molecules than the potato tubes, the decrease in mass and loss of turgor results from the net movement of water leaving the potato tube, the osmotic pressure is higher, and diffusing into the solution..