Dilute Lab Report Results

October 17, 18, and 19, samples were collected from multiple sites along the BSR. The class was split into groups, and samples were collected from seven separate locations along the river and WWTP. There was also a sample collected by the S which is located between sites four and five. For each of these sites, there were ten groups from other labs that also collected a sample from the BSR. At site two of the river, the location included multiple sources of possible contamination. A drainage site was located 200 yards upstream, along with a small PVC drainage pipe next to the collection site. Not only was there drainage running into the river, the site was under a bridge, and contained other trash scattered throughout the area. The

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

The purpose of this lab was to identify unknown bacteria cultures using various differential tests, and my unknown bacteria is #17. The identification of these unknown cultures was accomplished by separating and differentiating possible bacteria based on specific biochemical characteristics. Whether the tests performed identified specific enzymatic reactions or metabolic pathways, each was used in a way to help recognize those specifics and identify the unknown cultures. The differential tests used to identify the unknown cultures were Gram stain, Catalase, Mannitol Salt Agar (MSA), Blood Agar, Novobiocin, Coagulase, and DNAse (Alachi, 2007).

Stover, C. K., Pham, X. Q., Erwin, A. L. Mizoguchi, S. D., Warrener, P. Hickey, M. J., Brickman, F.S. LOlson, M. V. (2000) Complete genome sequence of Pseudomonas aeruginosa PAO1, an opportunistic pathogen. Nature: International journal of science. Nature 406: 959-964. Retrieved from https://www.nature.com/articles/35023079#main

The objective of the experiment “Keeping it Liquid” was to figure out what it takes to keep a compound in a liquid form which caused a phase change. A phase change is when a substance changes from one state or phase to another. There are three main phases that normally occur and they are called Evaporation, Deposition, and Melting. Evaporation is where a liquid changes to a gas. An example of evaporation is when water drops form on the glass of a cold drink on a warm day. Deposition is where a gas vapor goes directly into the solid phase without becoming a liquid first. An example of Deposition often occurs on windows during the winter months. While Melting is where a solid turns into a liquid. Melting occurs when ice turn into a liquid when

The purpose of this lab investigation is to make 1 L of Pirate Purple dye solution. The claim states that the use of the concentration and absorbance of the Blue 1 dye and Red 3 dye will lead to the concentrations of the red and blue dye to yield 1 L of Pirate Purple dye. In order to understand molarity or concentration, familiarity with the terms of solute, solvent, and solution are very important. A Solute is a substance that is being dissolved by a solvent. A solvent is a substance that is dissolving the solute. Solution is a solute of a homogenous mixture that is dissolved in a solvent. With that being said, molarity is the moles of a solute divided by the liters of a solution (mol/L). In accordance to concentration, absorbance is used

2. (5 pts) List and explain the names and affiliations of the various characters/stakeholders in this story – I’m looking for us to use the story to map out the complexities that are generally associated with solving public health puzzles – the stakeholders you list and explain here should apply to many of the cases we consider going forward.

2. When 2.00 g of NaOH were dissolved in 49.0 g water in a calorimeter at 24.0 ˚C, the temperature of the

In this experiment, the limiting reactant of all trials was the magnesium while the excess reactant was the hydrochloric acid. This means that, in this reaction, the magnesium is used up completely first, leaving extra hydrochloric acid behind. This was found through stoichiometry, as the reactants were converted into each other through mass-mass calculations. As such, through stoichiometry, it was discovered that magnesium was the limiting reactant as 2.5 grams of magnesium requires 7.5g or 7.5ml (Note: 1g = 1ml) of hydrochloric acid to react. On the other hand, 50g of hydrochloric acid requires approximately 17g of magnesium to react, which is far from the original amount had. Likewise, if 2.5g of magnesium, the largest amount of magnesium

This experiment was originally designed to illustrate what the concept of limiting reactants are and how they work.

In a test tube, 0.5mL of the sample will be added with 0.5 mL of water and shaken vigorously. Take note for its solubility by parts (0.5mL is one part). Keep adding parts of the solvent until the sample is soluble. If not, add until ten parts of the solvent and determine its solubility. To separate test tubes, water will be replaced with ethanol, chloroform, ether, and acetone as solvents. Same procedures were

The exponential growth of human population, caused an unprecedented problem for the global ecosystem. (Carolina EcoKits, 2012) The increase in pollution brought upon great fear and concern about what types of contaminants were in the foods and water supply for citizens. In 1977, the Clean Water Act was passed, the act ensured that any release of pollutants at toxic levels into any water source was forbidden. (Carolina EcoKits, 2012) It allowed for the Environmental Protection Agency (EPA) to set guidelines and standards for how pollutants were emptied in navigable waters. (Carolina EcoKits, 2012)

After completing my experiment I came to a number of conclusions for each solute, the first solute that I tested was Potassium chloride and as soon as I finished recording my data I came to a number of interesting conclusions. First, as mentioned in my observations, in each attempt the numbers were very similar in conductivity. This means that the data collected was very accurate since the numbers didn't change to much. Also, the Potassium chloride was the hardest solute to dissolve in water. This means that the solute is very saturated comparing to the other solutes that I tested. In conclusion the Potassium chloride was very unique comparing to the other solutes that I tested throughout my experiment.

When we write, “drill a 3/8” diameter, 1” depth hole in the center of the dowel”, the reality is a lot different. First, we need to find 3/8” tap size that is specifically designed for wood. Then, we need to find the center point of the dowel and figure out how to drill a hole perfectly centered. The process took us 2 hours in lab to figure out the most efficient and effective way to do such simple task. Because of time constrain, we decided to finish the system later in the day.

In a chemical experiment when two substances are reacting, one reactant will be consumed first then the other one and it will be call Limiting reactant. “The limiting reactant is a reactant in a chemical reaction that determines the amount of product produced” (Helmenstine). This is the substance that controls the results, depending on the amount that it can produce it’s going to be determinate how far the chemical reaction can go. The Percent Yield gives the amount of product that could possibly be produced in a given reaction. Percent yield measures how efficient the reaction is under certain conditions.” Percent yield measures how efficient the reaction is under certain conditions” (Boundless). To find the Percent Yield, we have to calculate