The egg shell completely disappears due to the vinegar reacting with the egg; bubbles form on the surface of the vinegar and on the egg because carbon dioxide was produced from
The purpose of this experiment was to determine the sugar (glucose) content in the egg and how different solutions affected the mass of the eggs, my hypotheses is the higher level of glucose the eggs sit in the solution will continue to rise and become hypertonic. In this experiment it called for 4 eggs and placed them in beakers. One was filled with ¾ of water, one with 0.5 glucose, 1.5 M glucose and the last was 2.0 M glucose. The eggs were weighed in the beginning and then every 15 minutes for an hour, recording the mass of the egg. With the numbers recorded the percent change in mass was calculated. Once this was completed and looked over I found my hypothesis to be wrong. The egg was tested in 2.0 M glucose started out with a mass of 93.5M
During the course of this lab, an egg is placed in different solutions to observe its reactions to each individual solution. The egg is first weight when it is at its original state in order to differentiate a change in its mass. Then it is placed in each solution for about 24 hours in order to see a visible and evident reaction. The reaction involves a passive transport known as osmosis. Osmosis is the transfer of water across a selectively permeable membrane in order to find a dynamic equilibrium, which means both sides are completely balanced. However, only water is allowed to navigate inside and outside of the cell during osmosis. Water moves from a higher concentration to a lower concentration, which means that depending on the egg’s water supply compared to each substance, its mass should change. This was observed in 3 different solutions, which include vinegar, corn
The reason a egg can float in saltwater is that saltwater has a higher density than freshwater. The density increases with salt concentration, so the amount of salt you need might depend slightly on the egg. A good starting point would be 6 tablespoons of salt in 1 glass of water (make sure it is fully dissolved by stirring). If the egg does not float, just add some more salt.
Water can diffuse into or out of a cubicle. The emplacement of the high concentration of water determines which direction the water diffuses. If there is a higher concentration of water molecules in the cell, osmosis will happen and the urine will run out of the cell, resulting in the cell becoming smaller. On the other hand, if there is a higher concentration of urine in the cell’s environment, the cell will expand because of the assimilation of water through osmosis. The various liquids in these experiments exhibit how diffusion flows from fields of a higher concentration of a substance to a lower absorption.
In the rubber egg lab also known as the osmosis lab, I first measured the circumference of the egg which was 6 inches. The egg had no cracks and was hard. I placed the egg in the vinegar and within seconds the egg started to bubble. These bubbles were carbon dioxide. After 72 hours the shell of the egg had started to dissolve or flake. This would be considered passive transport as the vinegar diffused across the egg shell without any force. Seventy-two hours into the experiment the membrane was exposed, and had a circumference of 8 inches. Before the egg had a shell and you couldn’t see through it but once the vinegar acted as an acetic acid it broke down the shell and left a yellow membrane that felt like rubber this is an example of diffusion. I then placed the egg in another container and put corn syrup over the egg for 24 hours. The egg had shriveled and shrunk, the water had left the egg and went into the syrup and that is what caused the egg to shrink. The corn syrup is essentially pure sugar with very little water so the osmotic pressure is very low. I then placed the shriveled egg in water and waited for another 24 hours. After observation the egg had no
The question that is being asked in this lab is what happens when the egg is put in an acid bath, water bath, then a corn syrup bath. In the acid bath the egg will do something to the shell. The hypothesis that was created for the acid bath is that if the egg is put in the acid bath then the acid will destroy the cell because the acid will eat away at the calcium of the shell. The hypothesis that was created for the water bath then the egg will increase in mass because the water starts to fill the egg. The hypothesis that was created for the cron syp bath is that if the egg is placed in the corn syrup bath the egg will weigh less because the water will leave the egg and corn syrup eats away ah the egg. The
The experiment included four cups: One contained 50% vinegar, the second contained 10% vinegar, a third contained soda water, and the fourth contained distilled water. The hypothesis for the cup with 50% vinegar was that this would have the greatest amount of chemical weathering because it had the most acidic solution. The hypothesis for the cup with 10% vinegar solution was that this would have the second-most chemical weathering, having the second-most acidic solution. The hypothesis for the cup with soda water was that this would be next in chemical weathering, having soda in the water. The cup with distilled water was hypothesized to have the least amount of chemical weathering because distilled water should be the most neutral
After the experiment it is concluded that the vinegar affects the eggs health or staleness. During the experiment the eggs with less vinegar became stale faster. You can tell this because the eggs were tilting. When the egg tilt, this means they are getting stale because when eggs are fresh they have little air but the more stale they get the more air gets inside of them causing them to tilt and then float.
In this lab, I learned the way osmosis and diffusion work in nature. The carrot and the salt water was a decent representation of the process. By observing the carrots, the swelling or shrinking of cells during diffusion and osmosis was illustrated and better understood.
Osmosis was demonstrated when eggs were put into vinegar, an isotonic solution, because the vinegar could pass through the selectively permeable membrane. Thus, proving my first formed hypothesis about the egg enlarging when put in vinegar. Osmosis was also demonstrated when the eggs were put into water, a hypotonic solution, because it had the same effect as before. The water could pass through the membrane and enlarge. Unfortunately, my hypothesis was wrong about water not affecting the egg at all. Finally, when eggs were put in corn syrup, a hypertonic solution, it caused the egg to shrink because of the high concentration causing the water in the egg to move outside of the membrane to the corn syrup. Proving my hypothesis was correct about
Table 2. Shows the 10 groups results of the rate of change in g/s with the average rate displayed along with the standard deviation. As shown the average rate is within negative 0.000293 and positive 0.001740. From this table we can confirm that there have not been outliers in the results, outliers could come down to the results of errors on the practical. These errors could be caused by incorrect use of equipment, fluctuations in the solution or difference in eggs used. At a zero concentration the average was 0.001740, when increasing the solution by one percent the average revealed a decrease by 0.00084. From two percent to five percent it increased by 0.00074, this shows that between the concentration of two and five percent the egg and solution had the same concentration gradient which caused the crossover from negative to positive.
what happens when a cell is placed in isotonic, hypertonic, and hypotonic solutions ; why an egg without it s shell is a good model of showing osmosis across a cell’s
The purpose of this lab is to determine how the egg changes when it was in different substances which were distilled water and corn syrup. The reason the eggs change in size is because of osmosis. Osmosis is a form of facilitated diffusion when water moves through channels, water is moving from high to low. There are three types of solutions, isotonic, hypertonic and hypotonic. When the egg is placed in an isotonic solution the egg will stay the same size. Isotonic is when the concentration of water is the same outside and inside the cell and water moves equally in both directions. When an egg is placed in hypertonic solution the egg will grow because hypertonic is when the concentration of water is higher outside the cell than inside. When an egg is placed in a hypertonic solution the egg will shrink because hypertonic is when the concentration of water is higher outside the cell than inside the cell.