Analysis/Conclusion Based on our observations during the separation techniques and some speculation, we were able to identify eight components of our mixture: graphite from the filtration residue, Epsom salt from crystallization, water and acetic acid through distillation, red and orange dye, iron metal, marble chips, and sand. To start with, the first separation technique we performed on the heterogeneous mixture was filtration. According to our observations of the residue, we believed graphite was one of the substances in the mixture. Graphite, a known ingredient used in pencils, is black or dark grey in color, like the dark spots on the filter paper (Figure 1B), and has the ability to leave marks on paper and other objects. Of the potential components given to us, only graphite possessed the ability to make a mark on other surfaces. This was supported by the smudges left behind on our finger and filter paper (Figure 1A, bottom filter paper) when we touched the residue. Afterwards, we conducted crystallization to evaporate the liquid in an attempt to detect the presence of a salt. Before stating which of the potential …show more content…
By comparing the texture of each, we can immediately eliminated baking powder, chemically known as NaHCO3, because it had a finer texture and lacked the crystalline structure evident in Figure 2B. The remaining suspects would then be table salt or NaCl in Figure 2D or Epsom salt in Figure 2E. In continuing to compare crystal structures, table salt had a blocky, cubic crystal structure; whereas Epsom salt contained more irregularly shaped particles, most of which appeared to be pentagons. Figure 2B showed that the crystal structure of the salt was in no way cubic or regularly-shaped, eliminating it from the list of possible constituents. That would leave behind Epsom salt as the identity of the salt from
The purpose of the Unknown White Compound Lab was to identify the unknown compound by performing several experiments. Conducting a solubility test, flame test, pH paper test, ion test, pH probe test, conductivity probe test, and synthesizing the compound will accurately identified the unknown compound. In order to narrow down the possible compounds, the solubility test was used to determine that the compound was soluble in water. Next, the flame test was used to compare the unknown compound to other known compounds such as potassium chloride, sodium chloride, and calcium carbonate. The flame test concluded that the cation in the unknown compound was potassium. Following, pH paper was used to determine the compound to be neutral and slightly
The purpose of conducting experiment was to determine the identity of white compound. Based on the 5 gram of unknown white compound several experiment conducted including solubility test, pH test, flame test, and ion test. Several materials including chemicals used throughout experiment and will be described through paragraphs.
In the salt and sand separation challenge our salt and sand measurements were off because we used to many transitions. We lost 6.79% of our sand and gained 10.97% of our salt. This shows that our procedure had flaws in it and should have been revised before we conducted the experiment.
I did accomplish the purpose of the lab. First, I determined the percentage of water in alum hydrate, and the percentage of water in an unknown hydrate. The results are reasonable because they are close to the example results. Second, I calculated the water of crystallization of an unknown hydrate. Furthermore, I developed the laboratory skills for analyzing a hydrate.
The purpose of this experiment was to determine the amount of water in Epsom Salt and determine whether the amount of water is equal to the theoretical value, when the chemical formula is MgSO4・7 H2O. To check the amount of water in epsom salt, 3g of epsom salt in each crucible 1, 2, and 3 were heated on 495℃. While the epsom salt was heated, white water vapor came out from the crucibles and disappeared in the air. According to the Table 1, as the epsom salt were heated, the mass keep decreased and when those were heated 5th and 6th times, 50 minutes and 60 minutes, there were no significant change in mass. From the Table 2, the leftover amount of anhydrous epsom salt in each crucibles were equal. There were 1.46g of MgSO4 in the crucible after the last heating and 1.54g of H2O was vaporized. Since the result of each trials are same, the standard deviation shows up as 0. By using the molar mass of each compound, MgSO4 got 0.0121mol and H2O got 0.0855mol, which the ratio of MgSO4 and H2O is 1:7.07. The mol ratio shows that when there are one MgSO4, there are 7 H2O. According to the chemical formula of epsom salt, which is MgSO4・7 H2O, the experiment shows that the experiment and the theoretical values are almost same. The random errors of the mass and mol for MgSO4 and H2O are 1.3699% and
To wrap things up, the lab was made for us to really comprehend about the physical properties of substances. As a result, salt, sand, and iron was used for the purpose. Then our jobs were to figure out how to separate an unknown mixture and to revive them back away from one another. By doing this lab, I got to understand the differences between pure substances, compounds, elements, and mixtures.The reason why was because we observed substances by themselves and did not use them any further such as salt and iron, this hinted these were elements due to the fact that they could not be broken down any further since they had nothing else added to them. Plus, substances such the combination of salt and iron or sand and salt were mixtures since several
The scientists used a capillary tube to streak the leaf pigment extract on a pencil that was previously drawn a centimeter from the edge of the paper cylinder. The
The hypothesis for this experiment was, If three different types of waters (saltwater, fresh water, tap water) are tested, then the liquids won’t evaporate at the same rate and tap water will evaporate at the fastest rate because it won’t have any non-volatile substances to hold it back from evaporating.
Grape soda and Epsom salt, who knew these two items, would lead up to one of the funniest, most embarrassing moments of my life. My basketball team pulled out and very important win, a win that would send us into the state tournament. On the way home, I asked my mom to stop by the store to get me some Epsom salt for my recovery soak. I walked into the store, grabbed the Epsom salt along with a grape soda. For some reason, the store was a little busy, and I stood in line for a short time.
Solid A was identified to be sodium chloride, solid B was identified to be sucrose, and Solid C was identified to be corn starch. Within the Information Chart – Mystery White Solid Lab there are results that distinguishes itself from the other 4 experimental results within each test. Such as: the high conductivity and high melting point of sodium chloride, and the iodine reaction of corn starch. Solid A is an ionic compound due to its high melting point and high electrical conductivity (7), within the Information Chart – Mystery White Solid Lab there is only one ionic compound which is sodium chloride, with the test results of Solid A, it can be concluded that is a sodium chloride. Solid B was identified as sucrose due to its low electrical
The product given, Acetanilide, was an impure product from a chemical reaction. It was purified through the process of recrystallization, where by-products and impurities were removed from the solid. This process gives a purer compound than what was originally given. Recrystallization is able to be used due to the solubility of the impure compound. Ideally, the whole solvent would completely dissolve in the water when the proper boiling point was reached. In this lab, the Acetanilide was soluble thusly this process would work properly. The end product of creating a pure substance was purified crystals.
By doing this experiment, I can know the physical and chemical properties of these samples. After I get my results about the physical and chemical properties of these samples, I can compare my results with the information given by the past student and identify the 5 unknown samples, finding out which sample is which substance. Hypothesis = ==
They thought it was Citric Acid and Baking Soda because of the physical and chemical properties. The mystery mixture and the combination were both compact and had small orbs. They both had a fine and sandy feel. Their chemical properties also looked a like. They fizzed with small-medium sized bubbles. Their bubbling time was also very close at 3 minutes. They also had a close temperature. The
(Reference 2) Baking powder is made up of three parts an acid which can be cream of tartar (potassium tartrate), a base (baking powder) and a starch filler to absorb the moisture. Baking soda is made up purely by sodium bicarbonate a chemical salt.
The labels have fallen off of two bottles thought to contain solid sodium chloride or solid sodium carbonate. Describe a simple experiment which would allow you to determine which bottle contains which solid.