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 measurements of potato tubes and applying them to different concentrations of sodium chloride, 0%, 2%, 5%, 10%, 20% and 26%, in beakers, then measuring the change in mass of the potato tubes later. The time taken to put all the potato tubes into solution was 15 minutes. Can the concentration gradient of sodium chloride solution influence the rate of osmotic diffusion undergone by potato tubes? Osmosis is a type of diffusion that applies only to water and is a passive process that does not require an input of energy from the cell; this is because the materials move with the concentration gradient. Osmosis is a process that occurs at the cellular level, involving the spontaneous net movement of water across a selectively permeable membrane, from a region of high to a low water concentration, in order to equalize the water level in each region . This form of diffusion occurs when molecules in high concentration are too large to move across the membrane. The term semipermeable 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 the osmotic pressure that maintains the shape of an animal cell and provides support for plant cells. Many factors influence the rate of osmosis, including particle size and temperature, however in this particular experiment the factor investigated is the concentration of sodium chloride. Potato tubes will be used to demonstrate the fact… half the paper… the variation in data collection. This event can be explained through the process of osmosis. The increase in mass as well as the increase in turgor, in potato tubes immersed in low concentration sodium chloride solutions is understood to be hypertonic. Since the solution is hypertonic, water molecules will diffuse into the area of ​​lower water concentration (the potato tube) to reach equilibrium. Alternatively, the decrease in mass in the potato tube immersed in highly concentrated solutions of sodium chloride can be explained by its immersion in a hypotonic solution. Because the sodium chloride solution is less concentrated in water molecules than in the potato tubes, the decrease in mass and loss of turgor result from the net movement of water leaving the potato tube, which has a higher osmotic pressure. high, and diffuses into the solution.