Chloraseptic throat spray and cough drops contain phenol as their active ingredient. It is also in many lip balms. Antipruritic (itch reliever) Because it can improve other preparations' effectiveness at relieving itching, phenol is added to lotions meant for the relief of insect bites and stings, sunburn, and other painful and itchy skin conditions. One of the preparations containing phenol is Sting-Eze, which also contains camphor for additional cooling effect. Blemish Removal In high enough concentrations, phenol's caustic effect allows it to quickly and relatively painlessly remove scars, warts, and precancerous growths.
INTRODUCTION Epoxy resins are chemicals that are resistant corrosion, have good mechanical and thermal properties, good electric insulating properties and low shrinkage upon curing. Epoxy resins are widely used in industry since 1946 as protective coatings, adhesives and used for structural applications though in structural applications they can be quite notch sensitive. Epoxy contain more than one epoxide group per molecule and they can react with myriads of substrates. The epoxide ring can especially react with alcohols, amines and carboxylic acids . Liquid resins are converted into insoluble and infusible solids through oxirane reactions.
Components that are more strongly attracted to the sorbent layer will travel a shorter distance, while components that are more soluble in the mobile phase will travel a longer distance from the origin.To identify possible pigments that are found in Robertson Parsley dry leaves, Thin layer chromatography was perfomed using a solid silica gel plate and a mixture of acetone, chloroform and di ethyl ether in the ratio 1:1:3. The solution from parsley was spotted on the plate and the plate allowed to develop in a developing tank.On removal of the plate from the tank, the migration front is marked together with all colour visible spots before they dry up.The distance travelled by each spot is measured and used to calculate the Rf values which are the ratios of the distance travelled by the sample to the the distance travelled by the solvent. The
Synthesis of Aspirin Abstract: Within this experiment, Acetylsalicylic acid, better known as Aspirin, is synthesized from the reaction of Acetic Anhydride, Salicylic acid, and Sulfuric acid (used a catalyst.) The procedure of the experiment itself employs vacuum filtration and recrystallization as methods of obtaining and purifying the product. The produced Aspirin is yielded as a relatively high amount in comparison to the theoretical yield. However, after employing Ferric Chloride testing and Melt-Temp comparisons, the purity of the product is seen to be rather low. The experimental procedure followed is ideal for production of an abundant, but relatively impure sample of Aspirin.
Hydrogen Peroxide at high concentrations can be lethal. Catalase is there to help with the processes of breaking it down to assure that this doesn’t happen. The purpose of this lab was to help us understand what happens when an enzyme works with a substrate to make the reaction faster. It was to help show us what the effects of pH and temperature on the enzyme’s reaction. My hypothesis for the experiment was that the optimum temperature for catalase to function is 98.6o F because this is the optimum temperature for the human body.
This is called the shaking and venting procedure. This procedure allows the benzoic acid (benzoic is the solute) to establish an equilibrium between the two layers the organic layer and the aqueous layer. Benzoic acid, although it has dissolve in water, is not very soluble in water (it will only dissolve in water at elevated temperature). However, benzoic acid is more soluble in methylene chloride. That is why once you add the benzoic acid aqueous solution and the CH2Cl2 in the separatory funnel the benzoic acid moves from the aqueous layer into the methylene chloride organic layer.
Tissue Papers Absorb Less Liquid in Volume When Concentration of Salt Increases This study was done in an effort to find out the minimum number of papers needed to wipe up a spill so that anyone could prevent wasting paper. In this investigation, sheets of tissue papers were dipped into salt water with different concentrations and soaked until the water traveled to the top, then the amount of water a paper absorbed in terms of both the mass and the volume was recorded. The result showed a strong, positive linear relationship between mass absorbed and salt concentrations, while it showed a slight decrease in volume absorbed with increasing salt concentrations. Further researches could be done to change the substances or even mix different solvents
Soda is like a flux to help decrease the melting point of silica, also, lime helps make the structure stronger. (Britannica, 2012) Soda-lime glass is used to make bottles, jars, windows, and lightbulbs. Coloring is added when it is liquefied to create stain glasses. (Laurel, 1996)Stained glasses are
If the solution of water and caffeine is mixed with the solvent dichloromethane, the caffeine is transferred to the dichloromethane. This results from the fact that caffeine is much more soluble in dichloromethane than water. Water and dichloromethane are not soluble in each other. The volatile dichloromethane can easily be vaporized off from the dichloromethane/caffeinesolution leaving fairly pure solid caffeine. In the process the solubilities of cellulose, tannins, and of chlorophyll will be considered.
At this point, the sponge contains residual magnesium and magnesium chloride. Thus, the sponge is crushed and treated with hydrochloric acid and water in order to eliminate excess magnesium and magnesium chloride. Another method for removing the residues is the high temperature vacuum distillation. Although the hunter process is similar to the Kroll process, the hunter process is more expensive and it is only used for the production of small amounts of high purity powder. The hunter process follows the same steps as the Kroll process except for the fact that sodium is added to the vessel and therefore, NaCl is the salt that is entrapped in the pores of the sponge formed.