Discussion Based upon the information from the four experiments, solution one is likely a homogeneous mixture of cherry drink mix and water. This is supported by the first experiment’s smell test. In this test it was noted that the smell was reminiscent of the drink mix encountered not only in earlier experiments but also in past experiences. The smell was sweet and an artificial cherry which led to the belief that it was a cherry drink mix. The absorption spectrum also helped to confirm that solution one was a distinct, different solution from the other two solutions. The lambda maximum value was different for all of the solutions as shown in figure 2.1. This means that they are different solutions because dilutions of a single stock solution …show more content…
The lambda maximum value is due to the properties of the solution and it is the wavelength that the solution absorbs light most intensely. Additionally, the fact that solution one did not interact with the NaCl and the NaOH means that it is likely composed of covalent compounds such as food dye and sugars as opposed to ionic compounds such as salts (figure 4.1). In addition, the conductivity was zero which indicates that it does not contain charged particles (figure 4.2). Red solution one is likely cherry drink mix that contains sugars and red food dye which causes its smell and properties in reactions. For additional confirmation through further experimentation, an absorbance spectrum can be made to compare the solution to red dye #40 and red dye #6. If the solution is cherry drink mix then the lambda maximum will correlate to that of the red dye it contains, either dye #6 …show more content…
The information was gathered in the form of absorbance, conductivity, smell, laser scattering, and reactions to NaCl and NaOH. The hypotheses were all supported through experimentation but, further experimentation should be done to confirm the identities such as more absorbance spectra, additional reactions, and metal-content tests. The smell test put the first solution into the sweet category and led to the belief that it was cherry drink mix and had been previously encountered. The second experiment proved the hypothesis because all of the solutions had different lambda maximum values which meant that they would not be the same in identity. The third experiment suggested that solution two was a gold nanoparticle solution because of its behavior in solution, supporting hypothesis three. Experiment four and the final hypothesis predicted that red solution 3 contained ionic compounds and because of the other experiments was likely
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 primary goal of this laboratory project was to identify an unknown compound and determine its chemical and physical properties. First the appearance, odor, solubility, and conductivity of the compound were observed and measured so that they could be compared to those of known compounds. Then the cation present in the compound was identified using the flame test. The identity of the anion present in the compound was deduced through a series of chemical tests (Cooper, 2009).
...ost likely to be battery acid. If it is water, it has a Ph level of around 7. For vinegar, the Ph level is approximately 2.4 - 3.4. Thus, once testing the liquid compare it with the Ph levels above to discover the mystery solution.
The mixture was combined with saturated sodium chloride, and the aqueous layer, containing alcohol, some acid, and water, was discarded. The organic layer was then dried with granular anhydrous sodium sulfate; this drying agent is used to absorb any water in a solution and should thus, result in a colorless solution. The final product was collected; it was mostly clear, though it has a pale yellow tint. Data Table 2 shows the results and calculations that were gathered after the completion of this experiment. No errors had occurred during the course of the experiment, which is testified by the fairly, high yield of
The color that was chose to be shined through the sample was purple. The spectrophotometer was set at a wavelength of 400nm to represent the purple color. It was zeroed using the blank meaning the spectrophotometer read zero as absorbance amount. The blank consisted of 5mL of water and 2.5 mL AVM and it was placed in cuvette. A solution with a known concentration of 2.0x10-4 M was used in the spectrometer. For this solution, 5 mL of the solution with 2.5 mL of AMV was placed in the cuvette. The cuvette was placed inside of spectrophotometer and the amount of absorbance was recorded. This procedure that involves a solution with a known concentration was repeated for the concentrations:1.0x10-4 M,5.0x10-5 M,2.0x10-5M, and1.0x10-5M.A unknown solution absorbance was measured by putting 5 mL of unknown solution with 2.5 mL AMV in a cuvette. The cuvette was placed in the spectrophotometer and the amount of absorbance was recorded. The procedure that deals with the unknown solution was repeated 2 more times with the same solution and the same amount of solution and AMV. The average of the three unknown solution was calculated and the concentration of the unknown solution was
In this lab, lab 4.3 Comparing the Concentrations of Saturated Solutions, we set out to find and compare the solubilities of two solids in water. In addition, we tested if solubility is a characteristic property of a solid in a given liquid. This lab allowed us to test and use a reliable way to measure the solubility of a solid. This lab can be replicated for any solid with the same procedure, thus it gives us a method to calculate solubility. The two solids we tested in this experiment were NaCl (Sodium Chloride) and NaNO3 (Sodium Nitrate).
... dichloroethane the density was 1.24 (1,3) making it most likely the unknown. Another property was the boiling point. The boiling point of the unknown during the experiment was 86.6 ℃; in comparison 1,2- dichloroethane was ±0.03℃ within the range, 83.3 ℃ (1,3). Lastly, to top it all the IR spectrum was closely related to the IR of the unknown. Researching the identity I also found a physical description of 1,2- dichloroethane that matched my description of the unknown, “Colorless liquid with a pleasant, chloroform-like odor” (1). I learned in the experiment that the numbers from my results for the unknown does not have to be exact for it to be identified. As long it is in a certain range the unknown should be known by using research and background knowledge. I also learned that there are many factors that can affect an experiment whether it is systematic or random.
Experimental Summary: First, my partner and I put the marshmallow and cheese puff on T-pins and used the Electronic Balance to measure the mass of each of them. Next, we put 100 mL of water in the 100 mL Graduated Cylinder and poured it into the 12 oz. soda can. We measured the temperature of the water with the thermometer. After
Random and systematic errors are both factors that can affect the reliability and accuracy of the results respectively. As all the graphs contained outliers, and hence, scatter, this indicates that random errors were present. Such errors may result from the inconsistent masses of the Alka Seltzer tablets. As these tablets were cut manually with a knife, it is unlikely that the mass of each half of an Alka Seltzer tablet would be the same. Thus, when using the tablets to react with HCl, the true number of tablets reacting would have not been the same as the number denoted for the trial, and with each repeated trial for the same number of tablets reacting, the reacting mass and ratio would have not been inconsistent. Consequently, the
By comparing the absorption spectrum of phenol red in basic and acidic solutions, the red (basic) form had a much narrower and higher λ max (560nm) than the yellow form (420nm). As a result, the red form of phenol red was more sensitive with pH changes and it was used in for an assay in part B. In part B, the standard calibration curve was generated in order to determine the concentration of phenol red in the unknown 2B. From the slope, the average concentration of the unknown 2B was 0.001009 M. More importantly, the % difference of unknown trials was low (0.40%), indicating the high precision and reliability of the result. In part C, the pKa of the phenol red can be determined by plotting pH as a function of log ([A-])/([HA]). The pKa and
As 10 mL of NaOH was added drop wise, the solution began to have a pink tint. The fuchsia color did not permanently stay until 9mL of NaOH was added. The pH indicator demonstrated when exactly the reaction has neutralized. Because an acid and a base reacted to form water and a salt, the reaction is a neutralization
Any patient harmed by the provision of a healthcare service is informed of the fact and an appropriate remedy offered, regardless of whether a complaint has been made or question asked about it. This is how the term “candour” is defined by Robert Francis in his report (1). GMC defines the professional duty of candour as openness and honesty when things go wrong (2). This is applicable not only to patients but also to colleagues, employers and regulators. In a profession as stressful as medicine where doctors and other healthcare professionals are entrusted with the provision of care to people, it is vital for the care givers to be completely honest with their patients, especially when things wrong. It is not an easy task and doctors hesitate to do so due to a number of reasons such as the fact that doctors see themselves as solely benevolent and do not appreciate that they may be sources
An error that occurred in the experiment was during the ceric nitrate test because solution 4 should have produced a color change. During a base hydrolysis of aspartame, aspartic acid, phenylalanine and methanol are produced, therefore the ceric nitrate test should have been a positive for alcohol. A reason that this could have shown a negative result is because methanol is a volatile substance and it could have evaporated out, which would have caused a negative ceric nitrate test
I blended on high to make the potatoes more liquid-like. I grabbed the cheesecloth and placed on the top of the blender. I poured the potato extract on the container and labeled it. I found out that I have to make 1% sugar solution so I grabbed the sugar and measured into 5 grams on the scale. I added 5 grams of sugar on 250 ml graduated cylinder and poured the water into the cylinder. I mixed the sugar with water and poured it into the saucepan. I refilled the water into the graduated cylinder and poured into the saucepan. I turned on the heat of the stove and saw the sugar dissolved. I poured into a container and labeled 1% sugar solution. I repeated the same thing with 1% salt solution by using 1 gram of salt and filled the water into graduated cylinder by 100 ml. I answered question three. In the first experiment, I grabbed four transfer pipets and used it to put solutions into the test tubes by 3ml. I labeled it and placed into the plastic cups so it can stand upright. I grabbed each test tube and poured 2 ml of catalase solution into it. I also tapped and swirled to measure the bubbles by using the ruler. I wrote the numbers into the lab report. In the second experiment, I labeled the room
It’s no secret that fragrance matters to us. It is a huge part of how we experience the products we use and the world at large. For this reason, it’s a deal breaker when it comes to our beauty and personal care products, especially if it’s a product that you leave on the hair and skin or a fragrance that lingers. Many of us have given up products that worked well because we could not stand the smell or because our significant other complained. The fact that fragrance affects not just us but those around us is something we often tend to overlook. Fashion icon Sarah Jessica Parker of Sex and the City once said this about fragrance "It 's immediately communicating more than your clothes, which we think tell our story, right? But clothes don 't invade anybody else 's space.” That’s so true. You can look away if a coworker is wearing something you don’t like, but you can’t hold your breath all day, now can you? Fragrance can even linger in a space long after the wearer has gone or linger on your close, long after you hugged your best friend. Fragrance has such a