Erlenmeyer flask

Methods This study compared the clinical isolates, containing varying levels of chitin, to the survival status and immune response of the patient that the cells were extracted from. To test whether the amount of chitin correlated with an increased ability of Cryptococcus neoformans to worsen human disease, the chitin levels of the clinical isolates were measured and analyzed with the clinical data for the patients. The findings of the study will contribute to the understanding of the…

Abstract:- The experiment illustrates the relationship between the limiting reagent and the amount of product produced as a result of a chemical reaction. The chemical reaction was carried out by mixing the solution of Na2CO3 and CaCl2 and the precipitates of CaCO3 were obtained as a product. The experiment was carried out in 4 trials in order to determine the limiting reagent and the actual yield of the product obtained. In the first three trials, Calcium Chloride was the limiting reagent and…

Anoxybacillus flavithermus AK1 is a thermophilic bacterium that is able to survive at temperatures ranging from 55 to 60°C. The AK1 strain was isolated from the hot spring “Al-Ain Alhara” located at a distance of 50 km southeast of the city of Gazan, Saudi Arabia. This study presents the morphological characterization of A. flavithermus AK1, includinga detailed description of its complete genome sequence. A total of 50 contigs were used to produce a genome sequence of 2,630,664bp that includes 2…

sample. This corrects for the loss of some sample during the addition of reagents. This volume calculated using the formula: mL of sample to titrate = 200 x [300/(300-2)] = 201 mL 8. Pour 201 mL of sample from the BOD bottle into an Erlenmeyer…

The difference in the amount of gas produced when changing the surface area of the Alka Seltzer pill. Research question: How does the surface area of the Alka Seltzer pills affect the amount of gas produced as measured by ml in the reaction? Variables INDEPENDENT: The independent variable is the pill's surface area to volume ratio. The pills will be split in half and quarters and ground into pebbles and powder. This variable will be changed 5 times during the experiment. DEPENDENT: The…

An excess of water was put into an erlenmeyer flask and weighed, resulting in a weight of 90.3grams. The water was heated as the unknown was added. The unknown was added until it could no longer dissolve. Afterwards, the flask was weighed again, weighing 91.072 grams, indicating that the weight of the dissolved solute was .76 grams. The reaction was as follows: Ca + 2H2O-> Ca(OH)2…

Once you check if the solution has been neutralized via litmus paper or Labquest, use enough paper towels or a rag big enough to dry up the spill as well as making sure the chemical does not seep through the towel. 2. A graduated cylinder, Erlenmeyer flask, and beaker were used to measure a 60-mL volume. Which of these devices seems to be the least accurate for measuring a 60-mL volume? How did you determine this during lab? State some reasons why this device might be least accurate compared…

titrant, KIO3 is dried for 1 hour. The purpose of this step is to remove any water that adheres to the compound that would lead to an inaccurate mass. A known mass of about 0.12xx grams of KIO3 is then weighed and dissolved with water in an Erlenmeyer flask. Excess KI and HCl was added to react with KIO3 to form I2 in the following equation: KIO3 + KI + HCl  KCl + I2 + H2O. Since KI and HCl is added in excess, the reaction will be forced to the right due to Le Chatalier Principle. It is…

Determining Percent Composition of Unknown Copper Ore Sample Iodine-thiosulfate Method: An Analytical Method The objective of this experiment is to eliminate all interfering species from a sample of unknown copper ore in order to later determine pure copper content. Copper ore can be found in a mineral that contains pure copper and other species that is mined and can later have copper extracted from them (Taher, 1999). To eliminate all interfering species, such as Iron, Arsenic, and…

In this experiment, unknown B was a solid mixture containing two compounds of interests, 1,4-dimethoxybenzene and neutral benzoic acid. These compounds were separated by extraction and washing, and liquid-liquid extraction was specifically performed. Extraction is the process by which a compound of interest is selectively removed from impurities, and washing is the process by which unwanted products or impurities are selectively removed from the desired product. In liquid-liquid extraction,…