It is expected that increasing the concentration of 〖"NaHCO" 〗_"3 " will increase the rate of reaction; however, there is a level of uncertainty involved since the only role that 〖"NaHCO" 〗_"3 " plays in the reaction is to remove the layer of hydroxide covering the silver (I) sulfide. It is important to investigate this questionable action because individuals need to be informed of the results of chemical reactions that could allow them to clean their silver more efficiently, making it more feasible to prevent skin irritation due to silver (I)…
On the other hand, strong chlorine smell occurs when the…
All of theses reactions was needed in ordered to be prepared for the lab experiment. Before the lab began it was necessary to follow the lab safety rules by wearing a lab coat, googles, and gloves. There were nine unknown chemicals in nine plastic droppers labeled from one to nine sitting at the label tables. There were nine clean test tubes that were provided in order to mix the chemicals together. 10 drops of each unknown chemical was added when being mixed in test tube to perform a reaction.…
Goals The goal of the lab was to investigate the properties and structure of an unidentified compound that was discovered in a local landfill. The group was called in to help determine the chemical and physical properties of the compound so we can let the people of the town know so it can be taken care of properly with or without further precautions to be taken. Another goal of this project was to devise the synthesis of the unknown compound. Experimental Design In order to determine the correct identity of our unknown compound, we first started with a couple preliminary tests, which include physical state and smell.…
When hydrochloric acid was added to the unknown and known solutions, both resulted in no reaction. This also occurred when potassium hydroxide was added to both of the solutions. Barium chloride was then added to the two solutions, which resulted in a cloudy white precipitate from both of the solutions. A cloudy white precipitate also formed when calcium nitrate and ammonium nitrate were added to both the unknown and known solutions. These reactivity tests were conducted in order to establish how the unknown compound would react with acids, bases, and salts.…
The Case of the Mix-Matched Chemicals Hypothesis: By measuring the pH of the unknown and known chemicals, the types of chemicals in the unknown bottles will become known. Purpose: The purpose of this experiment is to determine the type of chemicals that are inside the mislabeled bottles. Materials: • pH strips • 8 bottles of known chemicals: o silver nitrate o iron (III) nitrate o copper (II)…
The goal of the lab was to identify an unlabeled compound found in the chemistry stockroom to be able to dispose of it properly. This lab demonstrated the process of identifying an unknown compound as well as synthesizing the compound. Identifying the compound consisted of performing various tests to detect the chemical and physical properties of the compound and comparing it to the list of possible compounds. The tests conducted were the solubility test which the compound fully dissolved in water, the flame test which had no discoloration when held in the flame, cation and anion tests which showed the existence of some halides like Cl, Br, and I, pH test in which the compound had a pH of 6, and the conductivity test which had an average value…
Respectively, the known/unknown were reacted with HCl, NaOH, NaCl, CaCO3, and HNO3 and AgNO3. With the results lining up between the known and the unknown, more properties were identified and more evidence for a positive identification. The five reactions that were carried out further validated our conclusion, since the results were the same between the unknown and the known. For the four that did not react with the unknown, nor did they react with the hypothesized compound, validating the conclusion.…
This was done by documenting the state of matter, its smell using the wafting technique, color, and structure. Following this the solubility test was conducted. This was completed by taking 1g of the unknown compound and placing it within 100mL of distilled water inside a 150mL beaker. Stirring the solution using a glass rod, observations of the unknown compound dissolving (or not) after 10 seconds are recorded. Next follows the Anion Tests in which a chloride ion test and a sulfate test were conducted.…
The ball had just started and Kyle and Claudette were chatting when Kyle said. ‘You smell astoooounding!’... ‘I didn’t smell astounding. I had rubbed a pumpkin muffin all over my body earlier that morning to mask my natural, feral scent. Now I smelled like a purebred girl” (Russell 243).…
Discussion of Results: This experiment consists of three different parts. The main goal of the experiment is to identify the unknown compound the lab group was given. Along with this, the group is to discover the compounds many physical or chemical properties. Lastly, the group is supposed to create and preform two syntheses of the compound and see how they compare and contrast in different areas like costs effectiveness, safety, and potential yield of the compound. Through all of these different goals, the underlying key goal is to learn more about this unknown compound through the group’s own research and experiments.…
By combining the unknown compound with an acid, a base, and two salts, its reactivity was determined. Reacting the unknown compound with sulfuric acid (H2SO4) produced no visible reaction (precipitate), although the pH of the resulting solution was very acidic. Combining the unknown compound with sodium hydroxide (NaOH), a strong base, also had no visible reaction. However, the resulting solution was a lot more basic. Reacting the unknown compound with sodium nitrate (NaNO3), a salt, did not have a visible reaction nor did the pH of the resulting solution change.…
Observations and Results: There were a variety of physical observations that could be made as the experiment progressed. Initially after the addition of the sulfuric acid from the Repipet, the solution was a slight yellow…
As a result, the acetic anhydride could have tainted and added impurities to the final product of aspirin. The expected outcome was achieved. 3.68 g of aspirin was produced as a result of the reaction. Also the test to trace salicylic acid showed there was much less salicylic acid in the aspirin because the color was more faint when compared with the dark purple of the pure salicylic acid test tube.…
Similar to the unique emission spectrum of different chemical elements, different esters release distinct fragrances. They are responsible for many odors such as those found in apples, bananas, strawberries, jasmine, and roses. The saturation of the ester along with its molecular weight determine the strength of the odor emitted. 3 Procedure: First, 1.005 g of 4-aminophenol was placed in a test tube, followed by 3.1 mL of water and 1.25 mL of acetic anhydride. The mixture in the test tube was stirred for five minutes and allowed to cool to room temperature.…