A 125 mL flask was obtained. The square of aluminum was fashioned over the flask by laying the foil over the mouth and folding the sides down. A pin was then obtained and was used to poke a tiny hole in the center of the aluminum cap.…
Solubility: Solubility in various solvent at 25?c is given in the following table (Christianah et al., 2005).…
2. To determine the densities of water, an unknown liquid, a rubber stopper, and an unknown rectangular solid.…
4-6: Why did lung function in the deflated (left) lung return to normal after you clicked Reset?…
When holding test tube inverted over heptane flame, condensation formed against top walls of the test tube. When the burning splint was added the walls of the test tube became less foggy from the condensation formed from the heptane flame.…
In this lab, we used Bunsen burners to heat up a hydrated salt in order to determine the percentage of water inside of this hydrated salt. We heated up the salt in order to boil off the water, which allowed us to find the weight of the CuSO4 by itself. By comparing this final weight with the original weight and subtracting the difference, we were able to compile data about how much the weight of the hydrated salt decreased as the water gradually boiled away. In doing so, we were able to find the total weight of the water in the hydrated salt by subtracting the final weight weight from the original weight of the hydrated salt, allowing us to calculate the percentage of water in the hydrated salt by dividing the weight of the water by the original…
Conclusion: In this experiment we had to find the heat capacity of the calorimeter cup using two trials of hot and cold water. When we obtained the data after 10 minutes of recording 30 second intervals of the calorimeter cup temperature, we created a…
In the experiment, we tested a sodium chloride solution. Along with the tested solution, control groups (water and sodium phosphate) were used to be help understand whether or not NaCl was a buffer. Water was the negative control group and sodium phosphate was the positive control group. If NaCl was a buffer than the pH would be stabled as the sodium phosphate buffer. If NaCl was not a buffer than the pH would fluctuate like the negative control, water. During the first trial and prior to the drops of 0.5 M of HCl acid, the pH of sodium chloride was 7.50. After the addition of 5 drops of 0.5 M of HCl, the pH decreased by 4.83 and ended at 2.67 on the pH scale. When comparing the results of the sodium chloride to the control groups, the total pH change of sodium phosphate was only…
First, I would take a sample from different areas of the water to test the amount of dissolved oxygen in the water. Then after completing this test, I would check to see if there is” of course “an increase in the fish present in the water. This observation would help keep track of the fish present in different areas of the water and furthermore, I would be able to compare results.…
1. Determine the mass of the samples to the nearest 0.01 gram. Record. 2. Fill a 100 ml graduated cylinder about three quarters full with water. Measure the volume, and record as “volume of water alone” in the data table. Tilt the cylinder and carefully slide one of the samples down the side. Make sure the sample is completely submerged in the water. Measure the volume and record as “volume of water + sample” in the data table.…
To find out the densities and to find out the name of the unknown metals. (Based on the extensive and intensive properties)…
The number of electrons forming a charge cloud around the nucleus is (pick one of the following) greater than; equal to; smaller than the number of protons in the nucleus of the atom.…
Examples of a basic substance is shampoo or liquid soap. We use pH for the products we use and…
INTRODUCTION There are many reasons for knowing the identity of microorganisms. The reasons range from the knowing the causative agent of a disease to knowing the correct microorganism in order to make antibiotics. This study was done by applying the following methods; OF Glucose, Indole Production, and Malonate Utilization test for the identification of an unknown bacterium. The methods will assist in determining the unknown bacterium found in a 55 year old male that was passing blood and mucous in his stool. The patient had no pain but mild discomfort during bowel movements. The doctor noted inflammation of the lining of the rectum. The doctor removed a tissue sample for examination and referred the patient to a gastroenterologist for a barium xray and colonoscopy. While utilizing the methods stated above, the bacterium found was a facultative anaerobe due to the Gram Negative Rods, fermentation, and the production of indole. The specific Gram Negative Enteric Bacilli was Shigella dysenteriae. There are many reasons for knowing how to control bacterial growth as well as such as antimicrobial drugs, which assist the body’s defenses against pathogens. Microorganisms are capable of causing infection or spoilage. Controlling bacterial growth is important in poultry farm businesses that use equipment to decontaminate processing plant fluids before disposal. During quality control and safety evaluations, bacteria growth that needs to be controlled can be found. While controlling bacterial growth, clusters of Gram Positive Cocci were found. It was found some ways to control bacterial growth were disinfection, sterilization, antisepsis, sanitization, moist and dry heat, filtration, and radiation; just to name a few. The specific method used for control depends on various circumstances.…
.2400 grams of the unknown compound. This is done in duplicate and purple-tinted precipitates are placed in Gooch crucibles. The precipitates are suction dried using ethyl alcohol then acetone to…