Chemical kinetics

ethics: Possible hazards may be: *Chemical burns. - If this may occur during the experiment, immediately wash your hands and let the teacher or the person in charge know. *Equipment damage. - If some of the materials that have been damaged for example, broken glass or someone drops the test tube accidentally. Do not touch them and report it to the teacher quickly as possible. *Accidentally cut yourself or someone - Wash the wound immediately and do not touch any chemicals, report it to the…

All the materials were purchased from Sigma-Aldrich and used as received unless otherwise stated. Reaction (1) How to make Sodium Azo-Tetrazolate--Pentahydrate (SAT) Approximately 2.15 g of Aminotetrazolate monohydrate was added to approximately 62.5 ml of 2 M sodium hydroxide. While being stirred, the solution was heated, increasing its temperature up 10 degrees Celsius, up to 60 degrees Celsius. Over a one hour time period, potassium…

Along the lines of rate laws come half-lives. Such a common topic that comes to mind with half-lives is the decay of radioactive elements, or the time it takes for a certain sample of an element to reach half of its original size. For example, during the Chernobyl power plant incident in 1986, one of the most dangerous elements to begin its decay was Cesium-137 which has a half-life of 30 years. Therefore, people can’t move back to the area because of the deadly amounts of Cesium-137 still…

The rate at which a reaction occurs, referred to as reaction rate, is a type of reaction property that directly measures the extent of a reaction. Changes in concentration affect reaction rates in chemical formulas, and if the reaction is not specifically known, the rate cannot be determined. The rates are given in negative or positive measurements depending on whether the concentration is a reactant or product. Knowing this, the first step in finding the reaction rate would be to determine the…

Copper Cycle Experiment Date: 31st may 2016 Experiment Time: 1: 30 pm Purpose This lab experiment is divided into two parts A an B . In part A , we will start with our given solution of and synthesize a number of copper compounds by chemical reactions and observing every colour change and appearance, As a final step of part A , we will recover copper metal . In Part B we will synthesize two copper (I) compounds and observe their reactions . However we also get to learn using new…

DATA ANALYSIS The linear relationships between the time elapsed and the volume of gas indicates a constant enzyme reaction rate. The activity rate of catalase in figure 1 is calculated to be approximately 0.15mL/sec. The following figures show how this rate of reaction is affected by different external factors. The results in figures 2 and 5 show an increase in either enzyme concentration or substrate concentration will increase the enzyme activity. In figure 2, the 0.75% enzyme concentration…

There a five ways to speed up reaction rates. The first is to get the particles moving faster, this is done by heating up the particles, giving them more kinetic energy. The second is to increase the surface area, increasing the likelihood in which the particles will have contact with each other because it now has a greater surface area, this can be achieved by breaking down solids. The third is concentration…

Research Question: To compare the enthalpy change of reaction of 3 neutralization reactions by using 3 different acids of distinct pH. The same base of NaOH will be used in all three experiments. Introduction: Chemical reactions always have energy change. Energy in the form of heat, if liberated is known as exothermic and if absorbed in the reaction is known as endothermic. When a reaction carried out under standard condition at a of temperature 298K and 1 atm of pressure and 1 mole of water…

The TG and DTA curves obtained for the compounds (C1-C5) are shown in Figure 9. Table 4 lists the results of the thermal studies of these compounds with the initial and final temperatures (ºC), assignments of each decomposition stage based on mass calculation and DTA peaks. These assignments (Δm - Calcd.) are based on the structural fragments from the theoretical formulae of the compounds (C1–C5). This implies that the groups proposed in the right column of Table 4 are not necessarily the…

Determination of Isoprenaline Hydrochloride Concentration Using Ultra Violet/ Visible Spectroscopy and Quantification of Sodium and Potassium Using Flame Spectroscopy Introduction In UV/VIS (ultraviolet-visible light) spectroscopy, light absorption as a function of various wavelengths gives data about electronic transitions within a solution [1]. The electronic transitions involve exciting an electron from one principle quantum state to another by the absorption of energy [2]. A change in…