The substances used during the experiment have some hazardous drawbacks. Some hazards of working with trans-cinnamic acid are skin, eye, and respiratory irritation (CINNAMIC ACID). This compound may be combustible at high temperatures. Some hazards of working with acetic acid severe skin burns and eye damage Acetic acid). This compound is combustible. Some hazards of working with ethanol are eye and skin irritation and causes organ toxicity (Ethanol). This compound is combustible. Some hazards of working with pyridinium tribromide are severe skin and eye damage and lung irritation (Pyridinium tribromide). This compound is not combustible. Some hazards of working with silver nitrate are serious burns to the eyes and skin when in contact and …show more content…
Approximately 10mg of the white crystalline product was dissolved in 0.5mL of 95% ethanol in a small test tube to make a colorless solution. 10. The product was then introduced to 0.5mL of 2% ethanolic silver nitrate for the silver nitrate test. 11. The silver nitrate was let to stand for 5 minutes with the product and ethanol. 12. The silver nitrate and product created a creamy crystal precipitate and a cloudy solution. 13. The success of the silver nitrate test was recorded and the lab was concluded by cleaning the fume hood. Results When observing the product, it was clear to see that the formation of a creamy precipitate in the silver nitrate test meant the bromination of trans-cinnamic acid with pyridinium tribromide was successful. First, the mass of the filter paper was 20mg. With the white crystals after filtration, the product with the filter paper was weighed to be 1.058mg. The final mass of the product was 1.038g. The limiting reagent of this experiment was determined to be trans-cinnamic acid, with (Fig. 3). The theoretical yield of the product was expected to be 944mg (Fig. 4). However, the percent yield of this experiment was 109.96% (Fig. 5). Ultimately, the product mass collected after the reaction was a greater amount than the initial mass used in the original
Thus, a higher percent yield was calculated for acetaminophen. Although, a second filtration was performed; however, a very low concentration of acetaminophen was recovered as a result of human errors, and the transfer of solution/solid contributed to product loss. However, the mass use to calculate percent yield was the first mass recorded because it may be more consistent than the mass measured after the second filtration. However, for further experiments, the percent yield must be calculated with the corresponding mass of product (actual yield) even though there is loss of product, the actual yield is the final concentration of the recovered product in the experiment. Thus, the results may be more conclusive if the actual percent yield was used.
Yes, there are two adverse reactions occurring in all, however thankfully with responsible usage we can stave-off any
Its risks are that irritates lots of parts of our body like skin and throat, high exposure may cause cancer. This how dangerous it
al. found out that 2,4,5-T can cause birth defects and stillbirths in mice. Some other studies have shown also an increase in the cancer mortality rate for workers exposed in the same chemical. After some other studies and investigations, it was discovered and it was
The short-term effects of this drug include dizziness, weakness, headache, breathlessness, chest constriction, nausea, and vomiting. Diesel fuel, also listed as hazardous, may cause redness, itching, burning, severe skin damage and cancer if within contact of skin. Lead, which is harmful to children and Hydrogen fluoride, whose fumes are highly poisonous, pose problems as well. Sulfuric acid, which is corrosive to all body tissues, may cause lung damage and loss of vision. Many more hazardous chemicals are used in hydraulic fracturing.
Pages 96-98 in Chemistry 110 Lab Manual. Wilfrid Laurier University, ON, Canada. Abstract: The purpose of this experiment was to determine the level of purity by using the values for melting point and absorbance and chemically synthesizing aspirin by using phosphoric acid as a catalyst.
3. Upon adding 20 drops of NaOH, a white precipitate was formed signifying acidic impurity. In the second NaOH mixture, about 20 drops were administered and no precipitate formed indicating that the ample is more pure than before. Data: Weight of flask = 75.10 grams Weight of the flask with solids =
Conclusion: Based on the results of molarity from Trials 1, 2, and 3, it is concluded that our experimental for each trial is .410M NaOH, .410M NaOH, and .450M NaOH. The actual molarity of the NaOH concentration used was found to be 1.5M NaOH. The percent error of the results resulted in 72%. The large error may have occurred due to over titration of the NaOH, as the color of the solution in the flask was a darker pink in comparison for the needed faint pink. Discussion of Theory:
First, two grams on an unknown white compound were given. The possible compounds the known could be were CaCO3, KNO3, NH4Cl, CaCl2, K2SO4, (NH4)2SO2, Ca(NO3)2, NaC2H2O2, K2CO3, MgCl2, Na2CO3, 0.1 M AgNO3, MgSO4, NaCl, 0.2 M BaCl2, KCl, NaSO4, Mg(s), HCl, HNO3, NaOH, HC2H3O2, H2SO4, and KOH. The solubility test required using a scale to measure .575 of our unknown white compound. The unknown compound was measured in a 100 mL beaker.
COSHH †“ The Control of Substances Hazardous to Health Regulations 2002. Using a Risk Assessment to look at the medication being used and the
Therefore, we added 1.11g of CaCl₂ and 1.06g of NaCO₃ to a beaker filled with 70mL of distilled water. To separate the precipitate from the aqueous solution, we vacuum filtrated the contents of the beaker. Once we determined that the
But for now, it is not proven to be dangerous at all. And it does its work efficiently to a certain extent despite its
Phototoxicity and Photobleaching are other drawbacks of this
An active ingredient with a high acute toxicity can be lethal even when
Ammonia can irritate the eyes, skin, lungs, and throat. If your child suffers from asthma, they will become even more sensitive when exposed to ammonia. Splashing it into the eyes can also cause blindness. Phenols are a very common ingredient in many cleaning products. They can be absorbed by the lungs and skin and trigger kidney and liver damage or caustic burns, if they get into direct contact with the skin.