Thiosulphate solution

Osmosis is a type of diffusion where high concentrated water molecules move to lower concentrated water molecules through a selectively permeable membrane. Different concentrations affect the rate of osmosis. By increasing the amount of solvent in a solution, there will be lower water potential. If the water molecules inside of a cell has a higher concentration than outside, the water molecules would end up moving out of the cell. This will be known to be hypotonic because the cell will be bigger and

states that the size of a particle will not change the water potential or occurrence of osmosis in a solution-submerged cell, only the amount of the solute in the solution will affect osmosis. To test this, we used three different sized solutes—sucrose, glucose, and NaCl—to see if the size of the solute had an effect on the osmosis of water into or out of white potato cells that were submerged in solutions containing the 3 solutes. We found that the size of the particles of solute does not affect osmosis

Background/history: Kiara is a 20 year old woman who currently lives with her Grandparents in South Hadley Massachusetts. She has a primary disability of Dandy-Walker malformation and secondary to the Dandy-Walker Malformation she experiences problems related to hydrocephalus. To address the associated problems with hydrocephalus, Karia has undergone numerous operation to place a shunt which was implanted within the skull area to alleviate the build up of pressure. As a consequence of the shunt

membrane is called osmosis.” An experiment was done in BIO 100 regarding osmosis. 5 different teams got together and each of them has a task. To record the weight change in potato strips that have been placed in different concentrations of salt solution after 30 minutes. The groups were to observe the change in weight. The movement of water through cells is often called osmosis. Osmosis applies to the daily life in many different ways. Osmosis assists plants in receiving water, it helps in the

method resulted in a number that made sense for the extraction sample of an original 5% in water solution, 3.46%. The week two experiment resulted in a large amount of error, meaning that the conclusions drawn were not accurate, even though theoretically the standard addition solution should have had more accurate results. The main problem set out to be solved is finding ethanol percent in solutions of which the ethanol

determine what is the concentration of the unknown solution along with what concentration would be more isotonic to the chicken egg? Hypothesis If we placed our chicken egg into a higher percentage of sucrose solution for a set period of 60 minutes then the egg will gain weight. If the egg gained weight then the sucrose solution it was placed in had a low concentration that would make it hypotonic. If the egg loses weight then sucrose solution it was placed in had a high concentration that made

different sucrose solutions overnight. The hypothesis was if you place Jicama cores into different cups containing a lower amount of sucrose concentration and a higher amount of water concentration, then the cell’s mass would change. It was predicted that the cells’ mass would decrease due to less water transferring through the plasma membrane, and this is due to a lower water concentration being inside the solution than inside the core. Tests were taken to see which sucrose solutions caused the mass

Norah Albaiz CHMY143-016 Katie Link Lab Partner: Lydia Aman Freezing Point Depression Measurements Purpose: The purpose of the experiment was to determine the molar mass of three unknown solutes by measuring the freezing point depression of a solution containing each of the unknowns. When a solute is dissolved in a solvent, the vapor pressure of the solvent is lowered. As a result of the decrease in the vapor pressure, the colligative properties change. Colligative properties include vapor pressure

increase from the initial and final recordings. These tubes show that lower salt concentration is optimal for enzyme activity. Due to the lower concentration of NaCl in the solution, the enzyme is able to react more with the substrate. The more the ONPG reacts with the Lactaid, the more product is created, which in turn makes the solution a more concentrated yellow rather than a pale yellow. Referring to Figure 2 again, the most product was created from Tube 4 containing 5% NaCl concentration.

In order to conduct this experiment, a hypothesis had to be made on what would happen to the egg when it is placed in water and the question was answered by saying that it would alter in shape because of osmosis. Osmosis is when water moves from an area of lower solute concentration to an area of higher solute concentration. Then after making our hypothesis, the experiment was started by grabbing the egg from the bucket of vinegar with our hands. Second, the egg had to be taken to the sink and gently