Chemical Reactions Lab Report

Performing this experiment had limitations of not being able to analyze the rocks for specific elements like an experienced scientist would have. Using rocks of the same mineral composition, and size would eliminate that variable. The solutions were prepackaged and could not be analyzed with the equipment on hand. Analyzing the solution would allow the scientist to identify the specific elements in the solutions. The temperature in a professional lab would be regulated better than it was in this experiment temperature plays an important role in chemical

The objective of this lab was to use qualitative and quantitative measurements and observations to properly identify, and then confirm the identity of an unknown compound. After identification, the compound would have to be synthesized, in our case, through an acid-base reaction, followed by confirming its identity with the original unknown compound.

The goal of the experiment was to identify Unknown 33A and 33B. Unknown 33A was a white, crystalline solid that had a sweet cherry smell and Unknown 33B was a beige, yellowish color liquid that was translucent and had a viscosity similar to water. Also, the liquid was homogenous and smelled sour, similar to mildew.

The  lab was broken into three parts:  Part  1 dealt with identifying a  cation, Part 2 an

I looked at what the uses were in everyday life and compared it to how the mixture reacted. For example, citric acid is used in sodas, the mystery mixtures had bubbled resembling soda, so I made an inference that the two correlate and that is why we used citric acid as one of your first experiments.

The different foods were; Heavy Cream, Fat Free Milk, White Grape Juice, Gatorade, Water, Corn Oil, and Laundry Starch. Unknown A is Gatorade, Unknown B is Laundry Starch, Unknown C is White Grape Juice, Unknown D is Water, Unknown E is Fat Free Milk, Unknown F is Heavy Cream, and Unknown G is Corn Oil. The lab group figured this out by reading the food labels and seeing what ingredients are in it and what tests matched. In reality it was just a matching game.

Based on the results of the test, the unknown substance was Calcium Chloride. Multiple tests were performed to determine the identity of the substance. By comparing known positive results to the unknown substance, properties could be discovered about the substance. Most tests led to this conclusion, however some tests did not follow the established properties of Calcium Chloride.

Experiment 3: Identification of an Unknown Mixture by Extraction, Recrystallization and Melting Point Determination Alex Presello 103402448 Lab Completed: October 10th, 2014 University of Windsor  Experiment 3: Identification of an Unknown Mixture Abstract The purpose of this experiment was to first, extract two of three possible organic compounds from an unknown organic mixture (#2) and second, to identify them. The two main methods of separation used in this experiment were liquid-liquid extraction and recrystallization. In order to determine the identity of the unknown compounds, their respective experimental melting points were found and compared to the known melting points of compounds based on previous literature.

For the lab, what we did was we had five chemicals to mix. We had a 4x3 spot plate and dropped a small amount of two different chemicals. When the two different chemicals are combined we would notice if it’s acidic or basic. If we had gotten a clear reaction than we would add one drop of acid-base indicator. And if we have gotten a green that would indicate that it’s neutral. The purpose of the lab was to see the outcomes of two different types of chemicals mixed together. Before I started the lab my prediction was that most of the chemicals would show different colours but I was mistaken most of the combined chemicals were clear and one drop of acid base indicator it showed us if

Before being able to find the unknown ions inside the solution provided by the teacher, the ions needed to be examined for any physical or chemical changes to ensure the confirmation of each one. There were three separate sections to this lab, each one containing the same fifteen steps that needed to be followed to identify every ion. In the first part, the ions were given labeled in their original containers and divided into separate test tubes. Each ion was tested with the steps leading to their confirmation. Things such as color change or the formation of a precipitate signified a chemical reaction that confirmed the presence of an ion. This was used to give a better perspective on what would happen during the "real" lab procedure

Also a tray was provided that would be used to mix the ions and reagents. One by one the reagents and ions were mixed. Everyone had to make sure to write down what they observed. Some things that were noticed was color change,smell,texture, precipitation, and so on. Lastly the unknown ion must be identified by comparing it to the other ions.

Identifying an unknown substance can be accomplished with the use of multiple scientific tests. Conducting these experiments will narrow down the possibilities of the unknown compound. The number of the unknown substance that I was given was A84841BIR, It posed to be a challenge since I needed to test three different molecular combinations for this specific substance. Once the number of moles the in substance was calculated using the ideal gas law, I divided it from the sample mass number. After vaporizing away the unknown compound, I then concluded that the molarity of my unknown chemical was 58.93 g/mol. To find my molecular formula I calculated the mass of each element, then the moles, lastly I took the smallest whole-number ratio. Using the molarity calculated I was able to do some research to get a better understanding of what my unknown chemical could be. Once I have collected all my data together and researched the Internet for articles relating to understanding Infa-Red spectroscopy, I should be able to make an educated guess upon what my unknown solution could be.

Students were given two unknown compounds that were solid and liquid. Unknown 47A was solid that had a white powder with crystal flakes. The smell of Unknown 47A had a vanilla mix with an acidic. For Unknown 47B, it was a liquid and it had a high viscosity. The color of the liquid had a slight brown color to it, but for the most part was colorless. When the light hit towards it, it gives out a rainbow effect. In addition, it had a mild acid smell for Unknown 47B.

Before the experiment was initiated, qualitative observations were taken for all six mystery compounds and recorded. Necessary precautions like wearing safety

In 8th grade there were 20 scientists who was trying to figure out the mysterious mixture of chemicals. At first there were nine chemicals total. Now they have narrowed it from nine to 2. All 8th graders think it has baking soda in it. Half of the class is in disagreement with the other 1/2 . Half of the class thought it was Baking soda, and Citric Acid. The other half thought it was Baking soda and Vitamin C. The data going to be presented with help you understand why half of the class thinks it baking soda and citric acid, and why they don’t think it’s baking soda and citric acid.