In order to find the best way to do this experiment I am going to do a preliminary test first. If the potatoes all had the same mass, then results would be more specific and accurate. As seen the in the graph as the curve cuts the x-axis both theconcentration and differences in mass of the potato cylinders are thesame, thusly making the solution an isotonic solution which means thatthe water potential of concentration is similar to the water potentialconcentration of the potato cylinder. I drew a line graph, and then a line of best fit, which is sloping downwards, negatively. Explain the relationship between the change in mass and the molarity of sucrose within the dialysis bags. Are there any potential errors within the experiment? I could try investigating with more percentages of sucrose concentration, the size of the potato and have more short intervals between the molars.
Potato Osmosis Introduction: A shipwrecked sailor is stranded on a small desert island with no fresh water to drink. In order to fulfill the object of the experiment, potato was cut into 6 groups of 3 pieces and then it was scaled. To perform this lab, we prepared each of the five bags with their designated sucrose solution. Water potential is predicting the movement of water into or out of plant cells. The up raise of sucrose is the downfall of potato mass. In the first and second trials, use the sweet potatoes. All of the bags remained in their designated solutions for 90 minutes.
If potatoes are placed in a solute containing sucrose, then a concentration gradient would be present and the process of osmosis would naturally occur by moving water through the semi-permeable membranes. The dialysis tubing allowed the passage of water molecules only because the sucrose molecules are too large to pass through the membrane. According to the experiments I have done and the data I was able toextract I can say that my hypothesis was supported by the collecteddata, which is as the concentration of sucrose increases the rate ofosmosis increases. Turgid means swollen and hard. Chemistry, Color, Diffusion 1783 Words 6 Pages Effect of Osmosis on Potato Aim: To investigate the effect osmosis has on potato pieces that are placed in different concentrations of sugar solutions in water. Method: 1 Three test-tubes, A, B and C were labeled and initials of experimenters were applied with the date: January 29, 2013.
Weigh each one and record in table 1 for trial 1 and table 2 for trial 2 12. Tie off the other end of the bag, leaving room for expansion. However, Table 2 shows some accurate results. Diffusion and osmosis are passive movements and they don't require any energy. You and your students can make this lab as involved or simple as you choose.
If two solutions differ in the concentration of solutes that each has, the one with more solute is hypertonic. The container is filled with water on both sides, with the side on the left containing a low concentration of salt, and the container on the right containing a high concentration of salt. Purpose: In this experiment that we performed we will learn about osmosis using dialysis membrane, a selectively permeable cellulose sheet that permits the passage of water but obstructs passage of larger molecules. It was hypothesized that as the percentage, or concentration, of sucrose increased the rate at which Osmosis occurred would increase as well. Sugar molecules would diffuse from the concentrated solution into the dilute one until they were evenly spread out if there was no membrane, but they cannot do this as the pores are too small for the sugar to get through the membrane. Concentration, Dialysis tubing, Diffusion 941 Words 7 Pages Osmosis Lab Research Question: In this lab, our goal was to look at the effects of different sucrose concentrations on osmosis in potatoes.
According to our data, all the beakers caused the dialysis tubes to lose their mass and decrease in volume as a result. Since the concentration of the solutions are different, then Solution Y blue would be the most hyper-tonic solution, then Solution Z orange , Solution X clear , and Solution W yellow being the least hyper-tonic or possibly isotonic. This would also make the experimental setup be impervious to humidity and its variations. Lab 1D: Using paper, a pencil, and a calculator determine the solute potential of the sucrose solution, the pressure potential, and the water potential. Then I weighed all the potato chips on an electronic balance see results and recorded the results. The water potential of the potato would decrease because water moves from a high water potential region to a low potential region, and a dehydrated potato cell is hypertonic in comparison with the environment, forcing water to come into the cell.
Tie off each end securely. Hypothesis: If the potato is immersed into the distilled water, then it will be the heaviest out of the three. You should allow about two to three hours for the potatoes to soak in the water. As the concentration of sucrose increases the difference in mass ofpotato will increase since sucrose is a hypertonic solution whichmeans that it has a higher amount of particles dissolved in thesolution, while a hypotonic solution such as water where thereisfewer particles dissolved. Hypothesis: That the potatoes will either increase or decrease in mass, due to the effect of the different concentrations. I could use a syringe or a burette to measure the 10ml of sucrose solution, because those two apparatus are very accurate.
The part that has almost no weight change is the isotonic point. If there is high amount of sugar then the solution will be concentrated have a high concentration. She was dead in two days. The greatest water potential is within the dialysis bag. After 20 minutes, we took out the potato and scaled it.
You want there to me as much of the raw potato exposed as possible. Weigh each of the potato slices and record 8. Throughout osmosis, the cell could either get larger, or smaller. Water moves in and out of cells by diffusion, this diffusion is called osmosis. Explain the role of cell membranes as a highly selective barrier passive and active transport.
Diffusion is the net movement of molecules down their concentration gradient and osmosis is a specialized case of diffusion that involves the passive transport of water. What does it mean to be isotonic? They also have to calculate the molarity of the egg; it usually comes out about. Simply, will the effect of the action of osmosis be affected by the concentration of the solution? This is due to a process called osmosis. To determine the isotonic point of a sucrose solution and a potato 2. When the sucrose powder was weighed on the weighing machine after being placed on a filter paper, some of the powder might have flown away from the filter paper before being transferred into the beakers or some powder might have been stuck to the filter paper itself. Demonstrate diffusion and osmosis across membrane.