Gummy Bear Lab Report

Conclusion: The purpose of this lab was to find the relationship between the mass and the volume of the four samples. The densities from least to greatest were shortest(4), short(3), medium(2), and longest(1). Density can vary with temperature, and that could cause errors in the collected data. A real world application of density is icebergs. Icebergs float because they are less dense than the water around them. The icebergs are made of frozen freshwater but they are surrounded by very cold salt water. Initially, salt water has a higher density than freshwater and the low temperatures of the water cause the density to increase even more. The salt water and its increasingly high density allows for the less dense icebergs to float. Knowing this about density is good to know so we can figure out how things in the world work, like how and why massive icebergs float in the middle of the

them to any scientific changes. The mass of the gummy bear in the bag before the

Once measured, the gummy bears were placed back into the containers and filled salt water, and left like this over the weekend. Both were filled with 1 notch over 2 ounces of water. On the third and last day, the gummy bears were extracted from the salt water solution and measured. The first gummy bear was 3 centimeters in length and .5 centimeters in width.

The final circumference of the balloon in room temperature water was 37.5. It shrank 4cm less which is a huge surprise since we expected it to stay the same. The final circumference of the balloon in the cold water was 39.5. It shrank 2cm less as it was expected it would shrink. There was no pattern at all.

because each of the objects displaced the water by 1 mL, their mass over that mL is their density.

How does the size of a Gummy Bear change when it is soaked in water?

After completing this experiment, our tap water hypothesis was correct, and our saltwater hypothesis was also proven. For the tap water, the gummy bear expanded as we thought it would. This was because of osmosis. The water outside of the bear diffused into the bear from the higher concentration outside into the lower concentration inside of it. The gummy bear was a selectively permeable membrane. This made a hypotonic solution, and the water rushed into the bear, making it get bigger. For the salt water, the bear shrunk as we predicted, also because of osmosis. This was a hypertonic solution, so the water rushed out of the bear, making it smaller. So our hypothesis for both tap and salt water were correct. We carried out the experiment properly

I will be doing this experiment to understand density of water compared to the volume of an object. D=m/v=mass/volume

By the end of the experiment, it was predicted that the egg would be swollen when left in water and shriveled when left in corn syrup. Based on the data given from the table above, the prediction is, more or less, right. The egg did, in fact, shrivel up and the weight of the egg did go down as well. Compared to the beginning of the experiment where the egg had an initial mass of 81.50 grams, but by the end of the water aspect of the research the egg ended up weighing 93.74 grams, therefore, there was an increase of 12.24 grams. Using the data table the weight from the start the syrup aspect of the experiment was 93.74 grams, after being left in syrup the egg weighed a total of 57.32 grams, thus, the egg decreased in weight by 36.42 grams.

The mole is a convenient unit for analyzing chemical reactions. Avogadro’s number is equal to the mole. The mass of a mole of any compound or element is the mass in grams that corresponds to the molecular formula, also known as the atomic mass. In this experiment, you will observe the reaction of iron nails with a solution of copper (II) chloride and determine the number of moles involved in the reaction. You will determine the number of moles of copper produced in the reaction of iron and copper (II) chloride, determine the number of moles of iron used up in the reaction of iron and copper (II) chloride, determine the ratio of moles of iron to moles of copper, and determine the number of atoms and formula units involved in

Abstract: The objective of the lab is to determine the volumes of the polystyrene spheres with three different measuring tools: Water Displacement, Analytical Scale, and Triple Beam Balance Scale. The experiment is meant to help understand the concept and application of precision and accuracy in experimental measurements. Accuracy is a measure of how closely the results of repeated measurements are to the true value of what is being measured. Precision is the variability in the results from the repeated measurements, and how close the repeated measurements were to one another. In this lab, the method for measuring the volume of the polystyrene spheres is done with the previously stated tools: Water Displacement, Analytical Scale, and Triple Beam Balance Scale. The standard deviation for the entire classes volumes and masses are recorded to determine the densities.

I will share my newfound knowledge through this paper and I will discuss my finding with my peers and other people who enjoy chemistry. We have been discussing both water displacement and density in class; I assume the relevancy of this lab was to help people who learn better kinesthetically a chance to learn the material in a way they learn best.

In the third stage of this experiment, the density of a liquid was determined and compared to known standards. A 100ml beaker was filled to about half-full with room-temperature distilled water. The temperature of the water in ◦C was recorded in order to compare to known standards later. A 50ml beaker was then weighed on a scale in order to determine mass and recorded. A sample of the distilled water with an exact volume of 10ml was then placed in the 50ml beaker using a volumetric pipette. The 50ml beaker with the 10ml of water was then weighed again and the initial mass of the beaker was subtracted from this mass to obtain the mass of the 10ml of water. With the volume and the mass of the water now known, density was calculated using d = m/V and recorded in g/ml. This process was then repeated to check for precision and compared to standard values to check for accuracy. Standard values were obtained from CRC Handbook, 88th Ed.

2) State qualitatively why an incremental change in mass (i.e. 50 g) for the fully submerged case results in a different change in height, Δh, than the same incremental change in mass for the partially submerged case.

After that, it is crucial to convert the mass to volume. The water density at a temperature will aid this process. The compliance of the Volume Occupied by 1.000g of Water Weigh in Air table is deemed necessary throughout the comparison.