Sulfuric acid

Synthesis ofp-[1-(p-Hydroxyphenyl)-1-(p-Methoxyphenyl)Ethyl]Phenol (HMEP) 0.2 mol of phenol was mixed with the solution containing 100 mL of acetic acid in 200 mL of concentrated hydrochloric acid in 500 mL five necked round bottom flask fitted with anoil bath, thermometer, mechanical stirrer, reflux condenser. The contents of the flask was stirred for a period of 15 min, the solution was heated to 65oC, 0.1 mol ofp-methoxyacetophenone was introduced into a dropwise to the solution for about 6 h…

in the formulation of soap and also to produce the average quality of soap bar using basic formulations from palm oil. Generally, soap is a salt of a compound and it is known as a fatty acid. Most soap is produced either by using sodium or potassium. Its molecule has a long hydrocarbon chain with a carboxylic acid group…

Ethanol, PMS, l-ascorbic acid 1. The superoxide radicals is generated in 3 ml of TrisHCl buffer (16 mM, pH 8.0) containing 1 ml of NBT (50 μM), 1 ml NADH (78 μM) and ethanol extract of sample (25 – 50 μg). 2. The reaction was started by adding 1 ml of PMS solution (10 μM) to the mixture. 3. The reaction mixture was incubated at 25° C for 5 min, the absorbance was read at 560 nm using a spectrophotometer (Schimadzu UV-Vis 1700) against blank samples using l- ascorbic acid as a control. 4.…

Table 1: Experimental data for standardization of iodine solution. Calculation of standardization factor Standardization factor = (mass of vitamin C titrated) / (Volume of iodine solution used) = (125g) / (41.3ml) = 3.03 mg vitamin C/ml iodine solution Experiment B: Vitamin C titration using fresh fruit sample to determine the content The tabulated experimental data for this experiment is shown below (Table 2). In this experiment, the amount of vitamin C was calculated by multiplying…

Background : Stoichiometry is the relationship between the relative quantities of substances taking part in a reaction or forming a compound, typically a ratio of whole integers. In the lab that I did with my group we used stoichiometry to find out the decomposition of sodium biocarbonate. Sodium carbonate is just another name for baking soda, and that is what we used on our lab. Baking soda is also used in some food items, such as pancakes, waffles etc… When the baking soda is being heated…

standardize a sodium hydroxide solution as well as determine the molar concentration in as strong acid and the percent by mass of acetic acid in vinegar. We used volumetric analysis, also known as titration, in both experiments. The average molar concentration for NaOH was 0.2749 mol/L while the average molar concentration of the acid solution was .2493 mol/L.The average percent by mass of acetic acid in vinegar was found to be 12.3 % Introduction: The Purpose of experiment 9 was to prepare and…

compound that forms the toxic fumes produced when cadmium oxides are heated. It is an odorless white solid that is more dense than water. Cadmium nitrate is prepared by first dissolving the metal cadmium or its oxide, carbonate, hydroxide in nitric acid them immediately…

Since suitable crystals for X-ray single crystal analysis was not obtained, to have reliable structural information, HR-TEM analysis of the product was carried out. The average size of the assembly calculated from HR-TEM measurement is found to be 2.8 nm which is in good agreement with the size of the previously reported Pd6L8 assembly where L is the non N-methylated (2.5nm, Fig. 2).9 As first step, to explore the catalytic activity of 1 in copper and phosphine free Sonogashira coupling reaction…

Discussion: Based off the results from this lab the student was able to determine whether the model cell and cell environment each represent a hypertonic, hypotonic or isotonic solution. The first solution cell and environment the student had, was water and sodium chloride. In this instance water was the model cell (what was in the dialysis tubing) and Sodium chloride was the surround environment (plastic cup). The initial weight of the model cell was 13.2g, but after sitting in the sodium…

hetero-pairs in BLOCK (Plot A) follows similar pattern as Shannon Entropy Method (Plot C). Second, diversity profile for substitution by a given residue follows a characteristic pattern (plot B and D). Positional diversity changes when BLOCK undergoes amino acid substitutions. It is maximum when a position in BLOCK, has maximum and fixed occurrence of a residue (here V, first residue) followed by multiple copies of a second one (here I, second residue) with or without others. When other residues…