Investigating The Concentration Of A Plastic Bottle

2. Write a statement to explain the molecular composition of the unknown solution based on the results obtained during testing with the Biuret solution and each sample solution.

You know what color phenolphthalein and BTB turn when testing an acid or a base. Use three household cleaning products with BTB. Name the items tested and their results:

Experiment 55 consists of devising a separation and purification scheme for a three component mixture. The overall objective is to isolate in pure form two of the three compounds. This was done using extraction, solubility, crystallization and vacuum filtration. The experiment was carried out two times, both of which were successful.

Our objective for the Sherlock Holmes Experiment was to illustrate that some chemicals can be identified or differentiated by simple chemical tests, such as solubility, pH, or color tests. In our group we had to test come common powders such as Alka-Seltzer, baking soda, flour, Vitamin C (ascorbic acid), and salt. Other chemicals that were used to do this experiment were vinegar, and Iodine 2 Solution. The equipment used to do this experiment was red litmus paper, and 5 test tubes per group.

The primary goal of this laboratory is to correctly identify an unknown substance. To achieve this task, one may use various tests that reveal both chemical and physical properties of a substance. By comparing the results of a known substance and the unknown substance, one may eliminate alternative possibilities and more accurately predict the undisclosed compound. Furthermore, by performing these tests, data can be collected and verified regarding chemical and physical properties of the unknown. Understanding the chemical properties of a known substance aids one’s understanding of the unknown based on comparative analysis of the results of the tests.

Me and my lab partner, obtained a mixture of a un known proportion from the instructor and then flow the guide line in our lab manual to separate the mixture by applying the separation method motioned in our lab manual pages 33-40 . In this experiment, the separation methods were decantation,

2. Four unknown samples were included in the lab kit: flax seed meal, potato starch, egg whites, and dried milk. Using the results of the biochemical testing, determine which number corresponds to the correct unknown. (8 points)

We put these test tubes in an ice bath with salt and measured the temperature with thermometers. Unfortunately we ran out of time, and inferred that we had chilled the ink to the coldest temperature we could create. We found that both of the inks had a freezing point of less than 7 degrees fahrenheit. In addition, we used paper chromatography to determine the identity of the substance. The results were that both strips of paper had the same colors on it, but our ink appeared more linear and the ink from the lab appeared more mixed or tie-dyed.

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.

I believe that by testing substances with various chemicals, for example, vinegar, iodine and that will help to find out what the substance is and what is it quality.

I figured this out by using the results from the five tests then using the process of elimination. You need to explain the specific tests and HOW you eliminated certain ingredients. The suspect I think committed the crime is Tavaglione. The way I figured this out was I took the results from each powder then compared the powder with the evidence sample. I found that the heat test was the most helpful because, you can hear and see a difference in the substance that is being tested. A test that made a chemical reaction was the vinegar test. What are the 5 signs of chemical reaction? I think more tests than just the vinegar test yield chemical reactions. The vinegar test makes a chemical reaction because, when the vinegar touched the ingredient it will create bubbles. After figuring out E&B have are the same ingredients as the footpowder I still had to test the evidence to see if they were the exact same ingredients. You would also want to test the evidence twice to make sure you didn’t make a

To filter the foul water, 100.1 mL were poured into a graduated cylinder. The water had a dark brown color, with tiny particles floating around in the substance. It was also murky and hard to see through with a small

Once the application of the spinach extract was finished, acetone, the solvent, was poured into the beaker. Then the cylinder was placed into the beaker to absorb the solvent with a jar top placed on top of it to hold it in place. The chromatography cylinder stayed in the beaker until the pigments in the spinach extract had been separated into different colors and was about 4-5 cm from the top of the paper. After this, the chromatography cylinder was removed to dry for the different pigments could be observed.<p>

Unknown samples of a pure substance may be identified using the properties of that substance by finding the density of that unknown sample or the boiling and melting point of that sample and compare them to see if they are identical.

Remove the tubes and add 2-3 drops of Iodine – potassium – iodide solution to each tube.