Chemical tests

Enzymes Two major factors influence how effective an enzyme is by promoting the rate of reaction. Each enzyme has a specific temperature that allows it to perform the most work. If an enzyme is placed in an environment under its optimal functioning temperature, the speed of the reaction will slow. Reason being, the molecules of the reactants reduce in energy from the low temperature, less movement means less reactions with the enzymes. At higher temperatures, molecules within an enzyme increase…

For chemical method, sulfite browning inhibitor (principally sulfur dioxide or bisulfite) can be one of the method to inhibit the Maillard Browning reaction. The main reason sulfites can inhibit a wide range of browning reactions is the nucleophilic reactivity…

Initially, sand and hydrogen peroxide were added in a test tube to create a mixture. Based on the observation conducted, no reaction was visible (i.e. no gas occurred). In result, the solution did not react because it does not contain the desired enzyme in order to break down H2O2. An enzyme is needed to decompose H2O2 into water and oxygen. With this knowledge, students were able to determine that the results for the rest of the tests did make sense. For example, the solution contained…

are known as catalysts that cause reactions to occur more rapidly by lowering the reaction’s activation energy. A reaction’s activation energy is known as the minimum amount of energy required to get a chemical reaction started1. In order for cells to efficiently manage thousands of different chemical reactions, they make use of biological catalysts. Without these catalysts, biological reactions would not be able to proceed at a proper rate necessary to maintain life. Most, but not all,…

Abstract The primary goal for this laboratory experiment was to synthesize, purify, and identify p-nitroacetanilide using acetanilide as the starting material. To test for the purity and identification of our desired product, we gathered data from: Thin Layer Chromatography (TLC), Melting Point (MP) range, Infrared (IR) spectrum, Gas Chromatography Mass Spectroscopy (GC-MS), and Proton Nuclear Magnetic Resonance (1H NMR). TLC plate indicated the formation of our pure product due to the…

TiV photocatalyst was prepared by sol–gel method using tetra-n-butyl titanate as the precursor. Solution A was prepared by dissolving 17 mL TBT in 30 mL anhydrous ethanol with stirring (300 rpm) for 30 min. The other solution that contained 28.35 mL anhydrous ethanol, 7.25 mL deionized water and 20 mL 3 M acetic acid was slowly added into the above solution with magnetic stirring at room temperature. The prepared mixture was further hydrolyzed for 60 min with stirring until the transparent sol…

to find life in his head he used the acronym CAR-ME-GO. The acronym we teach all Martians that we plan on sending to Earth to decide if an object is living or not. Keeping this in mind as we go through the acronym we will see that cars do pass this test and because it pass that means it is alive. The acronym starts with C which stands for control means that a living thing uses energy to maintain an internal state. Cars have control because the use the liquid substances, that Marty noticed, to be…

Michael is an IG2 chemistry student. He has to his disposal, in the chemistry lab, the chemicals sodium chloride, in both chip and powdered form, and hydrochloric acid. Michael decides to mix the two substances by pouring the hydrochloric acid on the sodium hydroxide in both states chip and powder form. Michael does not have an aim or reason for doing this so his intentions are unknown. Michael gives a possible outcome or hypothesis that as soon as the hydrochloric acid is added the chips of…

The goal of this experiment was to use chemistry to analyze an unknown compound and through testing its physical and chemical properties determine what unknown compound that was found in a landfill. This would benefit the Environmental Protection Agency because once they know what the substance was they could determine the best way to remove it from the landfill and if there were any potential safety hazards to beware of while handling the substance. This would prevent any accidents that may…

The set of for this experiment included filling a 500 ml beaker as well as a 10 ml test tube with water. the second step was to invert the test tube placing it in the beaker without allowing oxygen to enter the test tube. A piece of glass tubing connected to a rubber tube and stopper was then placed in the beaker. The side of the glass tube not attached to the rubber tube is placed under the open end of the test tube. Next 10 ml of the 0.8% concentration of substrate solution was added to 10 ml…