Europium Reflection

Because it is a tertiary benzylic halide, the reaction is considered an SN1 type. To test the purity, the class then uses a TLC. When one places,” a spot of the substance on the absorbent surface of the TLC plate, the solvent (or solvents) run up through the absorbent,” (Zubrick223). The initial mass of the reactant, triphenylmethyl chloride was 2.006 grams. The experiment yield is 1.589g, which is a 80.3% yield.

The total run time was 25.0 min. Regression equations revealed good linear relationships for Pt and Pz (correlation coefficients: 0.9986 and 0.9989 respectively). This assay offers advantages in terms of practicality and suitability for the analysis of phloretin and phloridzin with acceptable validation results such as linearity, sensitivity, and recovery in terms of RSD (%).The method was linear in the concentration range of 50–500 ng/mL. The limit of quantification (LOQ) and limit of detection (LOD) was 68.74 ng and 20.62 ng for compound 1(PT) and 61.89 ng and 18.57 ng for compound

Hydrated Lime The results show that hydrated lime increased the intermediate temperature stiffness of the PG 64 - 22 binder. Hydrated lime showed to improve the fatigue properties of the aged binder. It could decrease the fatigue parameter by 23% which is a desired result when cracking due to aging is a concern. The mixing was done at three percentages: 1%, 2%, 3% . The lowest aging index was found to be at 2% by weight of the binder.

This took away Fe3+ from the solution, causing the equilibrium to change to reactant favored. With the reactions that the group did in this experiment the equilibrium changes wherever in order to balance the ratio between the products and reactants. The system changes in favor of the side with the least amount of stuff. When the group added heat to the system resulted in a decrease in the concentration of FeNCS2+. When the increasing the temperature it the reverse reaction of the system was the take away the heat.

In this experiment, 293 mg of aldehyde was weighted for method 1 instead of 250 mg and. Although .7906 mg of phosphonium salt was added, this probably was not enough to complete the reaction. The only significant change throughout method was 1 was that the yellowish mixture became slightly lighter. However, it was found that after vacuum filtration, there was some white and yellow

In this experiment, absorbance at A400 was directly proportional to the number of moles of p-nitrophenol. This shows that there is a linear relationship between the absorbance and the number of moles of p-nitrophenol, which later also shows that there is a linear relationship between the absorbance and the concentration of the p-nitrophenol, as the number of moles of p-nitrophenol will increased when the concentration of p-nitrophenol increased. The R2 value obtained for the standard curve is 0.9997, which indicates that the data obtained fit the line of best fit, showing that the data are accurate. The values of absorbance per µmol of p-nitrophenol were then obtained from the gradient of the curve, which will later be used in calculation in determining the enzyme activity. Based on Graph 3, it was shown that the enzyme activity of alkaline phosphatase increased with the increase of MgCl2

The Rf calculations of aspirin in table 1 shows an Rf value of .491; however, in table 2 the Rf value of aspirin was calculated to be .784. This Rf value is the higher among the other compounds because the Rf values decreases from aspirin to caffeine; therefore, this suggests that the

The second extraction was mainly by 100 % methanol. The percent recovery was measured by dividing the amount from the second extraction on the total amount extracted multiple by 100. By using extraction solvent of 100 % methanol, the percent recovery was between 1-5 %, with mean value 3.72 %. That is considered slightly higher percentage when compared with the reported from Esteve et al. With increasing the dilution of Methanol, a slight increase reported in the percent recovery mean value between 12.17 – 16.33 %.

We concluded that the rate of hydrolysis of (CH3)3CCl is directly proportional to water content in the solvent mixture. Aims of experiment • Determine the rate constants for hydrolysis of (CH3)3CCl in solvent mixtures of different composition (50/50 V/V isopropanol/water and 40/60 V/V isopropanol/water) • Examine the effect of solvent mixture composition on the rate of hydrolysis of (CH3)3CCl Introduction With t-butyl chloride, (CH3)3CCl, being a tertiary halogenoalkane, it is predicted that (CH3)3CCl reacts with water in a nucleophilic substitution reaction (SN1 mechanism), where Step 1 is the rate-determining step. The reaction proceeds in a manner as shown

Which totaled 93.00 grams then decreased 1.673 grams them the reaction took place. 2. The color of the copper carbonate hydrate as it was heated can help identify the product? The final color ended up being black which was CuO 3. Given that mass was lost from the copper carbonate hydrate during heating, in this decomposition reaction, how many moles of solid product were produced?