Diffusion moves down the concentration gradient, which is the difference in the concentration of molecules across a space”. “Osmosis will occur when there is an uneven distribution of solute in a solvent. The higher the solute in solvent, then there will be a higher rate of osmosis through the diffusion gradient forming a hypertonic or hypotonic solution. Solvent with equal or no solute forms an isotonic solution”. Hypothesis : When the quails’ eggs are immersed into 0% (distilled water), 5%, and 15% concentration of sodium chloride solution, the final mass of the quails’ eggs will increase.
Investigation of Osmosis in Quails’ (Coturnix japonica) Egg Research Question What is the effect of different concentration of sodium hydroxide solution on de-shelled quails’ egg? The concentration of sodium chloride used is 0%, 5%, 10%, 15% and 20%. How does the different concentration of sodium hydroxide solution affect the change of mass of quail’s eggs when the eggs are immersed in each solution and left for more than 24 hours? Variables variables Method of Controlling Independent Concentration of Sodium chloride Solution The concentration of sodium hydroxide solution prepared and used for this experiment is 0%, 5%, 10%, 15% and 20%. Dependent The average change of mass of quails egg The initial mass of each quails’ eggs is weighed and the eggs is weighed again after 24 hours.
DATE: 9th AUGUST 2011 TITLE: INVESTIGATION OSMOSIS IN QUAILS’ (Coturnix japonica) EGG Research Question How does different concentration of sodium chloride solution which is 0%, 5%, 10%, 15% and 20%, affect the mass of de-shelled quail’s eggs after they are immersed in sodium chloride solution for 1 day(24 hours)? Variables Table 1: Independent and Dependent Variables Variables | Units | Range | Independent variable | Concentration of sodium chloride solution | mililitre(ml) | Concentration of 0%, 5%, 10%, 15% and 20%. | Dependent variable | Change in the mass of quail’s egg | gram(g) | Difference between initial and final mass of quail’s egg | Table 2: Controlled Variables and Its Possible Effects On The Experiment. Controlled variables | Units | Possible effects | Time taken of the quail’s eggs are being immersed | Hours | The long time taken of the quail’s egg are being immersed in the sodium chloride solution which is 24 hours is kept constant.This causes the change of mass of the quail’s egg resultant from the osmosis process. | Volume of sodium chloride solution used | Millilitre(ml) | The volume of sodium chloride solution is kept constant so that the water molecules in each solution are the same.
In the radiation of onions, those who were exposed to 10 Krads of Co60 gamma irradiation for varying times and stored in cold storage and room temperature to see the effect, over three months only two – three sprouts in each onion bulb (Farooqi and Donini, 1976). Another study in India found that the exposure of onions to the gamma radiation for a short period of time killed microbes and increased the shelf life. This allowed for a crop of onions to have a shelf life of more than six months in storage after radiation (Biswas, 2015). Furthermore, it was found that when onion bulbs were gamma irradiated at 0.10 kGy and stored at a low temperature under ambient conditions, after four months 1-15% irradiated onions were rotting, whereas 5-64% onions were rotting when unirradiated under the same conditions (Nouri, 2001). When processing onions they are brought from harvesting and stored in ambient conditions until the irradiation takes place, they are then conveyed into an irradiation chamber with thick concrete walls ensuring no rays escape, and the gamma ray source is taken out of the water pool.
It is important for an IV solution to have salts in it so the water and solute can be equal to create an isotonic environment. If there wasn’t, there would either be a hypotonic causing the cell to burst, or there would be hypertonic causing the cell to shrink. We created models of living cells by using dialysis tubing. The dialysis tube represented the cell membrane to act as selectively permeable to water and some solutes. We observed different solutes (NaCl, Ovalbumin, Glucose, Sucrose, and Water) in the dialysis tubing.
1.2- Important factors affecting osmosis and diffusion would be how concentrated the solution or solute is, the temperature that the environment or the solution is. What your using and also how large the particle is. 1.3- Aim: The aim of the experiment is to document a rhubarb cell under a microscope, using different concentrations of salt-water solution to determine how much the cell decreases in size, volume and shape and to record the difference in cell reduction. (2) 1.4- Hypothesis: This experiment we expect that the rhubarb cells will drastically shrink with the higher concentrations of salt-water solutions. 1.5- Before starting this experiment we didn’t know how drastically the rhubarb cell would shrink, or if this experiment would actually be a success.
* Then you will have to put the test tube in a water bath and leave it until the contents reach the same temperature as the water bath. * Then you will have to take the thermometer from the test tube and put a glass rod into it instead. * After this you will have to use a 2cm syringe to measure out 1cm of lipase to the beaker in the water for the temperature you are investigating. * Then add the lipase to the test
1. It will take Kristen's Cookie Company 26 minutes to fill a rush order of one dozen because washing the bowl and beaters, adding the ingredients and mixing the ingredients takes 6 minutes; spooning the cookies takes 2 minutes per dozen; putting the cookies in the oven takes 1 minute; cooking time is 9 minutes; letting them cool takes 5 minutes; it takes 2 minutes to pack each box; and it takes 1 minute to accept payment. All of these processes add up to 26 minutes. 2. Assuming Kristen's Cookie Company is open for four hours each night, Kristen's Cookie Company can successfully complete 22 orders of a dozen cookies each.
It can be expected that once amylase reacts with the starch, maltose will then be broken down and less starch will be visible and more sugar will be apparent thus causing the solution mixed with iodine to become lighter and lighter. Materials and Methods Materials included: · · Rack of test tubes · Three spot plates · Hot plate · Large beaker for water bath · Amylase · Disposable droppers · Marker · Starch solution · Distilled water · IKI(dropper) · Benedict’s solution Method/Procedure 1. Identification of Starch To be able to identify the presence of starch, it was necessary to make a sample test by using IKI in wells on the spot plate. Three wells on the spot plate were filled with one drop of IKI each. In the first well two drops of water was mixed with the IKI to show what a negative
Osmotic pressure is a colligative property, meaning that the osmotic pressure depends on the molar concentration of the solute but not on its identity. An experiment was carried out by immersing two quail eggs in 5 solution with different concentration to investigate the effects of solute concentration on the rate of osmosis. Objective: -To observe the effect of different concentrations of sodium chloride on a de-shelled chicken’s egg -To explain the effects in terms of osmosis Research question: How do different concentrations of sodium chloride solution affect the difference in mass of two de-shelled quail eggs which represents the rate of osmosis, gram/day of the two de-shelled eggs? Hypothesis: The closer the concentration of sodium chloride solution to the concentration of isotonic solution, the smaller is the difference in mass of quail eggs thus the smaller is the rate of osmosis. When the concentration of sodium chloride solution is closer to the concentration of the isotonic solution, the difference in mass of the quail eggs is smaller; the smaller is the rate of osmosis.