Lab Report 5: Acetylsalicylic Acid (Aspirin) Synthesis Name: Divya Mehta Student #: 139006548 Date Conducted: November 19th 2014 Date Submitted: November 26th 2014 Partner’s Name: Kirsten Matthews Lab Section: Wednesday 2:30 L9 IAs Name: Brittany Doerr Procedure: For the procedure, see lab manual (CH110 Lab Manual, Fall 2014) pages 96-98. Wilfrid Laurier University Chemistry Department. Fall 2014. Acetylsalicylic Acid (Aspirin) Synthesis.
The product obtained was (2S, 3R)-2, 3-dibromo-3-phenylpropanoic acid and (2R, 3S)-2, 3-dibromo-3-phenylpropanoic acid, which are enantiomers. This was determined through melting point analysis. The melting point range for the product was 198 to 202 degrees Celsius, which is a lot close to the given melting point of the anti-addition product, 202-204 degrees Celsius. The given melting point range was 93.5-95 degrees Celsius. Furthermore, the syn-addition product is unlikely and difficult to produce due to stereochemistry selectivity.
Salinity is the measure of all the salts dissolved in water
The quantitative solubility of the unknown compound was determined to be 29/100ml. The known solubility of sodium sulfate is 28.11g/100mL water. Using the found solubility to compare to the known solubility of sodium sulfate. This solution created in the solubility test, the conductivity of the unknown compound was tested using an Ohmmeter to measure the resistance of the solution. Resistance is the measure of a substances ability to conduct
For example, in the article, California tries one solution to water problems- treating seawater by NEWSELA, it says, “To produce 50 million gallons per day of freshwater, Carlsbad will draw in 100 million gallons of seawater. The rest is returned to the ocean, but its salt lever doubled. The discharge water is so salty that it does not dissolve well in the ocean.” This shows that there would be salt sitting on the ocean floor.
Also, salt is a preservative and by calling them the salt of the earth, one is basically saying they are preserving the earth, and are essential
How a man goes about dealing with his past experiences portrays not only his character, but also his true inner self. This is especially true in Edith Wharton’s novel Ethan Frome. The main character, Ethan Frome, struggles with the consequences of his decision to marry his wife Zenobia following the loss of his parents. Ethan made this disastrous decision because of a feeling of obligation from societal pressure and ancestral conservatism. Wharton controls Frome like a puppet throughout the story displaying his perpetual contentions with his mistake-ridden marriage and uses it to power the novel as a whole.
This is different from table salt, which is mined and then heavily processed. Despite the differences in their sources, these two salts are almost identical. Aside from the iodine
Salt: Q1: What is salt? Salt, otherwise referred to as sodium chloride, is an exceedingly common mineral that is known for its strong flavour and crystalline appearance. Because of this, salt is routinely used in the preparation, preservation, and seasoning of foods the globe over (though the latter purpose is by far the one most commonly utilised), as it has been for generations.
“Diazotization of L-phenylalanine results in the unstable aliphatic diazonium salt 2, which is believed to undergo a rapid, intramolecular SN2 reaction to give the highly strained R-lactone (3) (3)”. “In a second, slower, intermolecular SN2 reaction, 3 reacts with the solvent (water) to open the lactone and yield the final product, (S)-2-hydroxy-3-phenylpropanoic acid (4)”. “Because this process occurs with two SN2 reactions, the final product has a net retention of configuration”. “This reaction has the added advantage of being environmentally friendly: the reaction is run in aqueous solution, using a safe amino acid and generates no hazardous waste requiring disposal”. “This experiment illustrates some important chemical concepts, including: Water solubility dependence on the state of ionization of a compound, Stereospecificity of the SN2 reaction, Measurement of optical activity, Effect of diastereotopic protons in the 1 H NMR spectrum”.
As the second order reaction rate constant of ibuprofen with HO• can be found in literature, and both first order ones will be estimated experimentally, the second order reaction rate constant of Acesulfame with hydroxyl radicals can then be estimated. In a similar manner, the calculations for the second pair of competition kinetics for HO•, Acesulfame and Atrazine (ACE, ATR) give: (Eq. 11) The same reasoning can be applied to the excited triplet state
There are two main types of salt- the ubiquitous refined salt and unrefined salt. Refined table salt is toxic to the body and triggers many degenerative diseases including hypertension, diabetes, stroke,
Once this relationship has been determined, it is possible to predict the biological activity of related drug candidates before they are put through expensive and time-consuming biological testing. The electronic effects of a substituent have an effect on the ionisation or polarity of a drug. This in turn may affect how easily a drug can pass through
TDS is made up of inorganic salts, and a small amount of organic matter. Usually inorganic salts include calcium, magnesium, potassium, sodium as a cation (positive charged ions), and carbonates, nitrates, bicarbonates, chlorides, sulfates as an anion (negative charged ions). Those solids can pass through a filter with pores of around 2 microns (0.002 cm) in size. Therefore TDS is a measure of the amount of material dissolved in water.
Solubility of a Salt Introduction: The solubility of a pure substance in a particular solvent is the quantity of that substance that will dissolve in a given amount of a solvent. Solubility varies with the temperature of the solvent. Thus, solubility must be expressed as quantity of solute per quantity of solvent at a specific temperature. For most ionic solids, especially salts, and water, solubility varies directly with the temperature.
