For our diffusion experiment our group decided to work with salt water and gummy bears. Our experiment tested the weight of the gummy bears per salt dilutions. Our tests included 1g 2.5g 5g, 1.5g, and 10g of salt diluted with water. We knew that the higher the concentration of salt diluted into the water the heavier the diffused gummy bear would be, therefore we measure weight as our numerical data. My hypothesis was that the 10g dilution of salt would have the gummy bear with the largest mass.…
Name: Sebastian Sak Lab Partners: Tim Gronet TA: Feifei Xu Determining Molar Enthalpy of Dehydration of Sodium Acetate Trihydrate Purpose: In this lab, two solid substances, sodium acetate and sodium acetate trihydrate, will be analyzed for the heat of solution for both processes. This allowed the calculation of the molar enthalpy of dehydration of sodium acetate trihydrate. Calorimetry was used to experimentally determine the heat of solution for both reactions.…
The balance had an uncertainty of 0.05 grams. b. With this experiment, we had a closed environment within the vial, not allowing any particles to come in or out, further explaining why there was no change in mass. The experiment also did not cause a visible reaction. The system was the vial, cap, water, and sugar. c. 2.…
CONCLUSION: Two weeks ago, Soundings XVI performed Lab Experiment Number Two. Lab Experiment Number Two was similar to the previous, Lab Experiment Number One. The prompt was to compare the results of pennies dropped in water, versus the result of pennies being dropped into milk, both at 100 mL. The main purpose of this lab was to further discuss more scientific parts of this lab, such as the surface tension when the cylinder was close to overflowing for both the milk and water. Before performing this lab, my group and I created a hypothesis to reflect upon and to state what we believed would dictate the results.…
Lab 4 in Chem 115 has three parts all calculating density. In part one, a 100 mL beaker, a volumetric pipet, and an analytical scale were obtained. To begin, the mass of the beaker was taken using an analytical scale. Then, 10.0 mL of an unknown liquid was transfered to the beaker using the volumetric pipet. Next, the mass of the beaker and liqiud was recorded along with the letter identifying the unknown liquid.…
Introduction An experiment was generated in the lab to enhance the understanding on taking the percent composition and formulating the empirical formula of a hydrate. In chemistry, hydrates are compounds which absorb water molecules and incorporate them as part of a structure. The hydrate in this experiment was an inorganic hydrate, meaning the bonds between water molecules were inadequate (What is a hydrate? (n.d.)).…
In this experiment, students were able to learn about the basic elements of the scientific inquiry which helped students think critically—students also used the scientific method to conduct this experiment. In this experiment, we were given a black bottle and a bag that had items that could be inside the bottle. The independent variable was the contents inside the bag, while the dependent variable was the contents inside the black bottle since that is what we had determine. In order to learn more about the elements of scientific inquiry, we made observations in order to come up with a hypothesis.…
The objective goal of this experiment is to identify a set of unknown liquids by measuring the liquids of three physical properties which consists of determining the density, solubility and boiling point of the liquids A, B, C and D. Ethyl acetate, methanol cyclohexane and acetone were the unlabeled liquids. In the data analysis the predictions came out to be liquid A for acetone, liquid B is for ethyl acetate, liquid C is methanol and liquid D is cyclohexane. Introduction and Experimental Details: In order to determine the density of the liquid, the formula density = mass/volume was used during the experiment. To be more precise, d = g/mL. To find the density, both the triple beam balance and the analytical balance were used. However, before…
Density’s separation of fluids was shown via the density column. The resulting column was nearly identical to that of the prediction. However, the rubber band actually sunk through the layer of dish soap and floated atop the maple syrup, as seen in Picture 1. This means that the density of the rubber band was greater than anticipated or that the dish soap’s was less than assumed. Besides that slight difference in order, the entire column stood completely as expected.…
In conclusion, our experiment shows that changing the temperature of the vinegar (acid) will affect the circumference of the balloon. When you heat the acid, the chemical reaction is greater resulting in a larger balloon circumference. When you chill the acid, the chemical reaction is lesser, resulting in a smaller balloon circumference. We tested the vinegar with PH strips to see if the acidity changed in the vinegar when it was at different temperatures. It was the same.…
In this experiment, Boyle’s Law and Gay-Lussac’s law were tested, using a gas pressure sensor and a temperature probe, in order to produce constants for both these laws. In Part A, a setup with a 20 mL syringe and a gas pressure sensor was used to measure the effect of a change in volume on the pressure of a gas, and to obtain various data points that were used to measure 4 values for a Boyle’s Law constant. In part B, a setup with a water bath, and a rubber stopper assembly in an Erlenmeyer flask was used to measure the change in pressure of a gas when temperature was changed, and to obtain 4 values for a Gay-Lussac’s Law constant. These sets of four values were averaged to provide 2 average constants, which were used to measure pressure at different volumes and temperatures respectively.…
Experiment 1: Observing The Familiar The skill of keen observation is vital in all educational subjects and in all aspects of life. The ability to describe and learn from observations undoubtedly results in a more educated, insightful, and inquisitive outlook. In science, observation is essential to the analytical process and in the findings of solutions for the world’s most perplexing issues. During this experiment an observation was conducted of a single ice cube in water.…
Question: How does temperature affect the rate of osmosis in raisins? Background: Osmosis is the passage of a solvent through a semipermeable membrane from a less concentrated to a more concentrated solution until both solutions are of the same concentration We designed an experiment that would test if a raisins rate of osmosis is affected by the temperature of water it is placed in.…
Each experiment yielded its own unique set of observations, calculations and results. The first experiment studied the relationship between volume and pressure, while keeping the amount of the gas sample and temperature constant. Table 1 shows the atmospheric pressure recorded during the experiment. Atmospheric Pressure (mm Hg)…
Slime is made by mixing together borax, glue, and water. Depending on the amount of borax added to the mixture will determine the density of the slime. For our experiment in class the independent variable was the borax. The dependent variable was slime. The control group was glue.…