Startle reaction

In this study, we use the modified organo nanoclay as a new sorbent for separation and preconcentration trace amounts of Au(III) in aqueous solutions. Nanoclay was modified with 5-(4'-dimethylamino benzyliden)-rhodanine. Modified nanoclay was used as a solid sorbent for separation and preconcentration trace amounts of Au(III) ions. The sorption of gold ions was quantitative in pH range of 2.0 to 6.0, whereas quantitative desorption occurs instantaneously with 6.0 mL of 1.0 mol L-1 Na2S2O3. The…

In experiment 2, we observed that the reaction of halogenoalkanes with aqueous alkali and water which contains dissolved silver nitrate. Halogenoalkanes are alkanes which have one or more hydrogen atoms replaced by halogen atoms such as fluorine (F), chlorine (Cl), bromine (Br) and iodine (I) which are the elements in group 7 in periodic table. Halogenoalkanes have the general formula, RX, whereby R is an alkyl or substituted alkyl group and X is any of the halogen atom. Besides, halogenoalkanes…

rate and order of the reaction. Three trials were done, the first trial acted as a baseline, then the following two trials each varied the concentration of a single reactant, allowing us to calculate the order of the reaction. Additionally, the temperature of the solution was changed to see what effect that would have on the rate. Using this information the activation energy for this reaction could be calculated and compared to the activation energy of the uncatalyzed reaction. Calculations…

keep the human body well maintained including chemical reactions and other complex tasks. In order to carry out these functions, it’s vital for the cell to possess a membrane. Cells create cholesterol, which is a cyclic fatty-product that maintains the cells permeability. Cholesterol is also synthesized to create steroid hormones, and also vitamin D. The way scientists synthesize this cyclic product is through a Diels-Alder reaction. This reaction is very important in the synthesis of many…

element. If they do not, the equation must be balanced by using coefficients. Mole ratios can be found by using these coefficients. Mole ratios are conversion factors and can be used to found the amounts of the reactants and the products in a chemical reaction. These can also be used to find the limiting reactant. A limiting reactant is the reactant that is used up and limits the amount of products formed. The other kind of reactant is the excess reactant, which is the reactant that is left over…

and it also showed if the reaction went to completion or not. In addition, the mass of the final product was obtained to determine the percent yield. To a 5mL conical vial with a magnetic stir bar was added 0.08g 4-t-butylcyclohenanone and 0.5 mL ethanol. Then, 3 mL of 0.6 M NaBH4 was added to the solution, and the solution was stirred for 10 minutes. After 10 minutes, HCl was added to solution. This caused the reaction to foam up and two layers appeared in the reaction. HCl was added until…

The purpose of this lab was to find the most efficient way to transfer heat from a chip to a water beaker. The heat transfer was coming from burning a baked lay and through our calorimeter heat energy was pushed out. Then we took it another step further by modifying our calorimeter to capture even more energy. The overall purpose was to capture as much energy as possible. “Energy is the ability to do work, or the ability to elicit change in matter.” (Castro) Energy can be defined in different…

Do mole ratios affect the amount of reactant that is produced? This experiment tested why mixing reactants in different mole ratios affected the amount of the product and the amount of each reactant that is left over. To solve the problem, the lab contained reacting sodium bicarbonate(baking soda) and acetic acid(vinegar) in different ratios and seeing if the product changed. The data suggests that the higher ratio of baking soda to vinegar creates the most product. For the ratio…

The procedure of the experiment includes two parts: 1. Determination of the Freezing Point of Glacial Acetic Acid: to record the temperature of acetic acid every 30 seconds until it reach 300 seconds (5 minutes). 2. Determination of the Molar Mass of an Unknown Compound: to record the temperature of the mixture between unknown solid and glacial acetic acid. After that, put the ice-water mixture into the tube and record the temperature every 30 seconds. Pre lab questions: 1. Solute: dissolved…

properties and reactivity, and also its synthesis.1 To accomplish this goal, we carried out five tests, the conductivity, solubility, cation, and anion tests because they revealed the identity of unknown sample 3.3 In addition, we carried out five reactions, reacting…