Binder viscosity was altered by changing temperature. The initial dispersion of the binder in the

After each of the solids were completely dry, each was placed into a MelTemp device. The temperature at which each solid began to melt and completed melting was recorded.

While we refluxed the solution there was no color change, the solution stayed clear. After gravity filtration the solution stayed clear. After roto vap, solution was a milky brown color.

Melting points are indicative of identifying an unknown product and the level of impurity the product contains. In this case, the possible identity of the product based on its melting points are determined by comparing the obtained melting points of the product to the melting points of the five possible products. Two mini capillaries, containing the product only, were used to determine the product’s melting point. For one mini capillary, the temperature range was 132.1-134.2℃, and the product’s melting point for the second minicapillary ranged from 135.1-137.5℃. In addition, melting points were obtained with the product mixed with meso-hydrobenzoin. The temperature range was 135.0-136.0℃ and 135.0-137.5℃. Although the recorded melting point values fall into the racemic range, but the results still indicate that the product is a meso-hydrobenzoin. The melting point values for the product mixed with the meso-hydrobenzoin standard explains that it is unlikely that the product is racemic. The melting point values were two degrees from each other due to the meso-hydrobenzoin standard making

The mixture was transferred to an ice bath to crystallize the product, after which the product was collected by vacuum filtration on a Hirsch funnel, washing the flask with small aliquots of cold xylene and pouring the solution over the crystals, allowing the vacuum to thoroughly dry the product. Additional drying was achieved by transferring the product to filter paper and pressing the crystals to remove any excess moisture. The product was then weighed and a melting point determined. A comparative TLC was run in Hexanes:Ethyl Acetate solvent against maleic anhydride to verify the purity of the

Introduction: The rate of a reaction is the speed at which a chemical reaction happens. If a reaction has a low rate, that means the molecules combine at a slower speed than a reaction with a high rate. Some reactions take hundreds, maybe even thousands, of years while others can happen in less than one second. (Chem for Kids, 2016). Reactions require collisions between reactant molecules or atoms. The formation of bonds requires atoms to come close to one another. New bonds can form only if the atoms are close enough together to share electron. Higher temperatures make the collisions between molecules more violent. The higher temperatures mean higher velocities. This means there will be less time between collisions. The frequency of collisions will increase. (Chem, 1999) H2O2 is the chemical formula for hydrogen peroxide. The decomposition of hydrogen peroxide will break down into oxygen and water.

Water was added to the glue in a separate cup and another separate ratio of water was added to the sodium borate. The mixtures were mixed with glass stirring rods. In each trial, different mass ratios were used. Grams was the metric unit that was used in this experiment. After adding up the ratio of glue/water/sodium borate/water for one trial, forty grams should be the total mass. In trials

In performing the proper experimentation, we poured some of the methylene blue substrate in a piece of paper, for ease transport towards the agar plates. We performed it cautiously by not inhaling it, for it is a form of powder. We carefully place the substrate at the center of the agar plates, to ensure that is that there is enough space for diffusion to take place. After the moment we placed the substrate, we carefully placed a transparent ruler under the plate to measure the diameter of the substrate in 0 minutes. We carefully note the time, having a 15-minute interval and record the changes in the diameter of the substrate. We continued it, until we have an hour observation.

Pursuant to Article 4.12 of the CSU-AAUP Collective Bargaining Agreement, I am submitting this binder in support of my Professional Assessment. The content of this letter is organized to reflect the order appearing in “Professional Assessment Form-DEC” found at the Office of Human Resources website. The material in this binder is selected in order to abide by the Senate Bill Clarifying Procedures for Renewal, Tenure, and Promotion (SB 03/04-1) which states that “in no case is the assessment dossier to exceed one one-inch binder.”

Next, the layer was dried with anhydrous sodium sulfate and exchanged to round base flagon to set up for basic refining. The round base jar is discharged out and set up for sublimation. As a result of the choking of time, the blend was not ready to sufficiently warm to get a nice sum on the tube to gather for weight and dissolving point. Along these lines, I was not ready to inspire enough to finish dissolving point. The softening point was taken from somebody in lab whose dissolving point was between 88-100°C. The measure of grams recouped was .07g. That is a modest number which prompts a low percent yield and is expected to not having the capacity to warm for a drawn out stretch of time because of the test being longer than

What we did in this lab first we did was shake the cup with the sugarcubes in it and break it down to weigh it. The cubes represented the rocks, we used sugarcubes because they are like rocks and they break easily. I thought the sugarcubes were going to break down and it was just going to be powder. What did not happen was they broke all the way down to a powder. My data does not make a perfect line because it was a prediction and predictions are not always right.

The hopper is filled with granules of plastic powder. The hopper stores the material until it is needed.

Lava temperature impacts viscosity and velocity because a high lava temperature means that there is lower viscosity and that there is a higher velocity. For Room group A in C period, the “lava” flowed not too fast and not too slow. The average velocity for this group was 4.23 cm/second. The length of the pancakes was either 12 cm or 13 cm and the time that it took to travel throughout the pancake ranged from 2.09 seconds to 4.46 seconds. The syrup flowed faster than the Cold group’s syrup did, while it flowed slower than the Hot group’s syrup did. Room A group’s data was pretty good data and there was not many mistakes that led to an outlier. The only way that the data was slightly influenced was that someone dumped the cup and it spilled all

Once cooled, the mixture was then transferred to a separatory funnel using the funnel while avoiding adding the boiling chip. 10 ml of water was then added to the mixture. The mixture was gently shaken and the phases were allowed to separate. The funnel was then unstopped and the lower aqueous phase was drained into a beaker. 5 ml of 5% aqueous NaHCO3 was added and then shaken gently. A great deal of caution was taken into consideration because of the production of carbon dioxide gas which caused pressure to develop inside the funnel. The pressure needed to be released so the funnel was vented frequently. The phases were allowed to separate and the lower aqueous phases was drained into the beaker. After draining, 5 ml of saturated NaCl was added to the funnel and then shaken gently. Once again, the phases were allowed to separate and the lower aqueous phase was drained into a beaker. An ester product was produced and was transferred into a 25 ml Erlenmeyer flask. This organic product was then dried over anhydrous Na2SO4 to trap small amounts of water in its crystal lattices thus removing it from the product. Finally the ester was decanted, so that the drying agent was excluded from the final product.

The objective of this experiment is to obtain the grading curve for both fine and coarse aggregate.

The ethanol solution was stirred at regular intervals using an unreactive rod, whilst a stopwatch was used to accurately determine the melting-point of each capillary tube, by clear visualisation of the meniscus