Use the 15 cm long ruler to help you if you are trouble. 7. Now cut the 6 cm long potato chips in half, use the 15 cm ruler to help you to make the potato chips 3 cm long. (Exactly half) 8. The next step is to take the potato chips and weight the mass of the potato chips, use a balance for this.
After they were cut into 2.00 cm each we found the mass. We zeroed out the scale and weighed all four potato cores at once and recorded the mass. We then put those potato cores into the beaker of 75 mL of solution. With the potato cores in the beaker we then put a watch glass over the top of the beaker to minimize the amount of solution that evaporates. We let the potato cores sit in the solution overnight.
Introduction When solutions have a lower concentration than the solution that is surrounding them, then that solution is known to be hypotonic. When solutions have a higher concentration than the solution that is surrounding them, then that solution is known to be hypertonic. When a solutions concentration has the same concentration as the solution that is surrounding it, then that solution is known to be isotonic. Osmosis is when molecules move from high concentrations to low concentrations with water. Diffusion is when molecules move from high concentrations to low concentrations.
Test at least 3 other substances in your house using the iodine, to determine if starch is present. Suggestions include different types of paper, bread, vegetables, etc. Describe what happened, and which substances you tested contained starch. (25 points) The iodine turned a dark blue almost purple color when it was combined with starch. I tested iodine on a piece of cut potato and once in contact it turned a dark blue-purple color therefore stating starch was present.
Three terms are used when relating to tonicity; Hypertonic, Hypotonic, and Isotonic (khan, 2016). In hypertonic environments (where there are more solutes outside than inside the cell) cells will lose water. In hypotonic environments (where there are less solutes outside than inside the cell) the cell will gain water. When solute concentration is even both in and outside of the cell there is no water movement so the cell would be in an isotonic environment (Figure 1). Purpose The purpose of this experiment was to find the effect of sucrose solutions on osmosis.
The overall project goals and central questions that has to do with the project is mostly trying to determine the isotonic concentration of the salt in potato roots and the use of the ideal soil salt conditions for the potato plant growth. In part 2, we had to test the enzyme activity that is in the was involved in the potato, so we can also determine the ideal soil pH conditions for the potato plant growth. In part 3, we were able to test absorb the leaf pigment at various wavelengths that determine the optimum light absorption conditions and was able to make recommendations for the light conditions that would be used un greenhouses. The goal of the first project is to determine the ideal soil salt for potato roots and we can relate this to the project is to find out if Solution A or Solution B has more solute in it. The goal of this project is to determine the meaning of Osmosis.
Surface Area to Volume Ratio shows the amount of area the entity has versus the amount of space inside the entity. If the entity was a cell for example, a larger ratio is preferred because when the cell grows and gains a smaller ratio the cell will divide because the volume inside had too much demand for the surface area. Therefore, the hypothesis will be: The larger the surface area to volume ratio the potato has, the weight will have more of a dramatic change. Variables Independent Surface Area to Volume Ratio Dependent The percentage weight change is dependent on surface area of potato Controlled The amount of salt solution used Percentage of salt in solution Length of time the potato is sat in water Materials needed 3 Potatoes 600 ml 15% salt solution Utensils 4x 300 ml beaker Knife Cutting board Scale Ruler Procedure 1. 8 rectangular prisms will be cut from the potatoes;
The experimental hypothesis for this experiment was prove as the results from the experiment provide evidence to suggest so. The osmosis process was shown when the potato cylinders were submerged in the salt solution and over time this only became more prominent. Looking at graph A, the potato cylinders submerged in the water solution gained mass and became harder when pressure was applied. This meaning no osmosis happened as expect as the mass gain implies there was just passive transport. The water molecules in the water solution were small enough to pass through the semi permeable membrane in order to equalise so there was a balance between the potato and the water solution.
Hypothesis When there is a gradient of high water concentration to low water concentration, the water molecules will move faster, and when there is a gradient of low water concentration to high water concentration, the water molecules will move slower, therefore, the rate of osmosis will be faster the water concentration is from high gradient to low gradient. My hypothesis is as the concentration of Monosodium glutamate increase, the mass of the liver cell also increases. This is because of osmosis and how the liver cell submerged in the solution allows Monosodium glutamate to pass to the permeable layer of the liver cell. IV. Variables Types of Variable Measurement How to
In this lab I will be exploring how temperature impacts the rate of osmosis by placing pieces of potato of equal size in solutions of different temperatures and observing the change in mass of potato after a given period of time. The change in mass will indicate the rate of osmosis. In reference to a study conducted by Irfan Nadiadi and Sarah Mugharbil (2007), the end results of
The purpose of this lab was to measure the amount of CO2 gas given off by germinated peas under certain conditions of light. We conjectured that the more amount of light the peas are exposed to, the higher the respiration rate they will have. Our data supported this because it showed that the germinated peas that were exposed to light 24 hours before the experiment had a steeper slope (as seen in table 1), therefore having a greater respiration rate. The peas that were not exposed to any light 24 hours before the experiment had a reduced rate because of its lack of exposure to light. Both pea’s respiration rates showed that the more light the peas were exposed to, the greater respiration rate they would have (Figure 1).