Stephania Turyk and Anastasija Racic
March 2016
Pre Lab Questions Why is it so important not to eat or drink anything in the lab?
It is important not to eat or drink in the lab because the lab may be full of many contaminations that may enter your food or drink causing you to be very ill. Describe the direction of the flow of water when plant cells are placed in a hypertonic solution.
When a plant cell is placed into a hypertonic solution, the flow of the water is leaving the plant cell, since the plant cell will have a higher concentration causing the two solutions to have an unequal concentration. What is the difference between a control …show more content…
The gummy bear in the distilled water saw a change in mass of 560%. The gummy bear placed in this solution also became very fragile and had a gelatinous consistency. The vibrant green the gummy bear initial had became a paler green on the edges of the gummy bear and the edges became transparent. The edges became transparent due to the extra water content. The reason that the gummy bear in the distilled water experienced such a large change could be explained by the concept of hypertonic/hypotonic. Distilled water does not have any solutes in it and the gummy bear had solutes such as gelatin and sugar this means that the surrounding solution of distilled water is hypotonic to the gummy bear. To balance out the concentrations, the water diffused into the gummy bear resulting in a larger and heavier gummy …show more content…
The temperature in the lab over night could have fluctuated. This can affect the movement of water into the gummy bear. If the temperature was lower overnight, the diffusion of water could have been slower and affected how much water could have diffused into the gummy bear in that period of time.
Solution: The solution to the first error could be to place the cups into a controlled setting where the temperature remains consistent. Error: The second error could be the amount of moisture on the individual gummy bears. If the gummy bears all had varying levels of “dryness” it will affect the amount of water that would diffuse into the gummy bear. The dryness on the gummy bear could be a result of the environmental factors such as temperature and air quality. As well as where the gummy bears were located in the container. Gummy bears on the outside of the container would be drier than those placed on the outside.
Solution: A solution to this error could be to store the gummy bears that will be used in the experiment in a controlled environment setting where the gummy bears will not lose any moisture and have a consistent texture and gelatinous