Which Is Your Metal Lab Report

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).

In this project, C. Elegans are hermaphrodite worms that will be used since they are easy to maintain in lab, as well as have short life cycles. The gene that the project attempted to knockdown in C. Elegans with RNAi treatment is the unc-22 gene. RNAi disrupts gene expression in the presence of double stranded RNA (dsRNA) that is complementary to target gene sequence. The unc-22 gene codes for a muscle protein called twitchin in wild-type worms. The Unc-22 is required for muscle regulation and maintenance in C.Elegans. To verify that the RNAi treatment worked, would check the unc-22 mRNA levels in the worms, in addition to phenotype observation.

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.

The order of steps were determined by which solids did not have to be mixed with water and which solids had to be mixed with water. So the first steps were determined if there were any magnetic materials in the mixture; which the iron filings were. The best first step would have been to separate the large materials from the small materials (the bird seed would be separated from the sand, salt, and iron filings) using a sifter so that all the salt, sand and iron filings can be found easily and nothing is sticking to the seed. Then measure the mass of the bird seed in a souffle cup. The second steps determined were by size because if the larger material, such as bird seed got wet, then the result of recovered mass would be harder to determine

XIV. Record your observations of the dried, cooled copper metal and weigh the recovered copper.

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

Purpose The ultimate purpose of this experiment is to go through the copper cycle through various steps that include dissolution, precipitation, conversion, and reduction of copper. Throughout the processes the qualitative observations were recorded to see what effect each type of acid and decanting has on copper. All of these steps were successfully completed by using different acidic solutions and zinc to take copper through the cycle from copper solid to copper nitrate to copper hydroxide, to copper oxide, to copper II sulfate, and back to copper solid. Procedure CHE 131 Experiment 1,

In this science unit we had to keep 200 milliliters of boiling water hot as warm as possible for 20 minutes. For trial one we put tin foil all around flask so the heat waves would reflect back to the flask. Also we put tin foil on the top of the flask to stop convection because warm rises. So when the hot air rises we wanted the tin foil to reflect the hot air back into the flask. Then we were going to put the flask in in a wooden box with a small volume, but then keegan forgot to bring in the box so we had to put the flask with the tin foil around it in our ELA project.Then we put a ton of cotton balls all around the flask and tin foil to insulate the water in the flask. At the end of trial 1 we lost 15.7℃. One thing we did well is we kept the heat in by insulating with cotton balls. Another thing we did well was stopping convection by putting tin foil on the top.

The main purpose in doing this experiment was to figure out how much of the percentage of Copper’s mass is in a brass alloy using a spectrophotometer that is hooked up to the laptop. Another purpose in doing this experiment is to learn how to use the Beer’s Law plots to learn how to use the equation and get the correct concentrations. This is important in everyday context because it is important for people who work doing many different types of jobs. Safety Information: In this lab, we used nitric acid to reactant with copper.

4. Describe the procedure for extracting copper from one of its ores. Include relevant chemical reactions, equations and energy considerations involved. Extraction of copper from chalcopyrite (CuFe2) occurs using processes such as: mining & crushing, froth flotation, roasting & smelting and electrolytic refining. Mining the ore

The main objective of this experiment is to carry out qualitative analysis to identify metal cations in unknown solution 1.

The periodic table is composed of metals, nonmetals, and metalloids. Each of these materials have their own properties that are used to define and identify them. Metals are commonly solids at room temperature, malleable and ductile, they often have high tensile strength, they commonly have a silver or grayish-white luster, and they are good conductors of heat and electricity. However, there are exceptions; mercury is a liquid at room temperature rather than solid, gold and copper are yellow and reddish brown rather than silver, and manganese and bismuth are brittle rather than malleable.

In this experiment the specific heats of aluminum and copper were found. Through calculations and the experiments, the purpose of this lab, which was to determine the specific heat of two metal was achieved. According to the data, the specific heat of aluminum is 0.495 J/g℃ and copper’s is 0.168J/g℃. However, sources of error during this lab did occur, including assumptions made and the calorimeter system used. It was assumed that the metal reached the same temperature as the boiling water, however this was not calculated. Due to this the metal may not have reached the same temperature was the water in the beaker thus skewing the results of the specific heat. In addition, the assumption that the temperature of the metal and water became equal

The observed temperature was recorded beside Ti of water on the data sheet. The probe was removed from the calorimeter cup and placed in the beaker of boiling water. However, the probe did not directly touch the metal because the probe would not give an accurate temperature (29). This temperature was recorded to the nearest 0.1 degrees Celsius on the data sheet beside Ti of the metal. Finally, the probe was removed from the boiling water and wiped dry. After the probe returned to room temperature, 23 degrees Celsius, it was returned to the calorimeter cup until the next step in the procedure