Chemical kinetics

The results of the lab show the decomposition rate of H2O2 at various amounts of KI, H2O, and H2O2. In addition, the effect of temperature on the rate of the reaction can also be seen in the results. Figure 1 Figure 2 `Figure 3 Figures 1,2 and 3 represent the results obtained from the keeping the amount of KI constant and varying the amount of H2O2 and water. It can be seen that when H2O2 is doubled (Figure 1 to Figure 2) the rate is also doubled from 0.0368 mL/s to 0.0723 mL/s. When the…

unit. The interface transfers the analyte in solution phase from the LC column to the high vacuum of the MS as a single molecule in the gas phase. Two interfaces will be discussed: Electrospray Ionisation Interface (ESI) Atmospheric Pressure Chemical Ionisation (APCI) Interface Electrospray Ionisation Interface (ESI) Figure 2: Schematic Diagram of Electrospray Ionisation…

3. Results and Discussion 3.1. Temperature dependence of D.C. Electrical Resistivity The temperature dependence of the D.C. electrical resistivity of all the samples of Co-Cr ferrite system was studied using two probe method in the temperature range of 200-7000C. The resistivity of the prepared samples was calculated using the relation 1. From fig. 1 and 4, it is clear that the resistivity decreases with increasing temperature ensuring the semiconducting nature of the prepared spinel ferrites…

Paragraph 1 This paper talks about how the crystal structure of FePO4will change at different ranges of temperatures. FePO4 has a crystal structure which is similar to quartz, which is made up of 2 phases at different temperatures. At low temperature, FePO4 will demonstrate α phase till the transition temperature of 980K before demonstrating the β phase. Space group of α phase FePO4 is said to be P3121, thus suggesting it has a trigonal structure. As for β phase FePO4, the space group will be…

Freezing and crystallization are linked in that both processes involve initial nucleation followed by crystallization. Sonication is thought to enhance both the nucleation rate and rate of crystal growth in a saturated or supercooled medium by producing a large number of nucleation sites in the medium throughout the ultrasonic exposure. Two main theories which explained the mechanism of nucleation are Hickling theory and molecular segregation theory. Among two theories Hickling is most commonly…

Diffusion and osmosis affect the environment, our bodies, and the world we live in. They are processes that happen constantly. The diffusion of chemicals and smog from factories and cars into the atmosphere causes problems (Ovodenko, Alexander, and Keohane). Diffusion is also used in our homes, for common things like perfume (Diffusion). Diffusion and osmosis are also important to our bodies. Diffusion can be a process of molecules entering cells and taking out waste (Why is...). Diffusion also…

The hypothesis for the experiment is that if the temperature and pH increases (but not past optimal levels), and the higher concentration of amylase, then it will result in faster rates of enzyme activity. Therefore, if the opposite were to occur, then the reaction will slow down and not function properly. For concentration, my hypothesis was proved to be correct. The undiluted solution had higher frequencies of collision at the active site of the enzyme and substrate. Which means the percent of…

It is believed that at higher potential foils can be overheated and deformed, which can quench the reaction propagation. The quenched reaction front with deformation will be explained in more detail in the next section. The reaction front speed of 1Ti/2Al reactive foil is nearly constant for different potentials. The high conductivity of this foil type and moderate diffusion distance of atomic mixing exhibit nearly constant reaction velocity. With increasing activation potentials, the reaction…

Reviewing my data table and graph results it is clear to see that as the substrate concentration increases so does the rate of reaction. The catalysing of enzymes involves molecular movement of the substrate and enzymes in an aqueous solution. Therefore the substrate and enzymes are moving randomly within the solution (Brownian motion). By increasing the concentration of the substrate particles the rate of reaction is increased as the substrate is much more likely to find an active site. This…

Discussion As a result of the calculations made above, considering the overall; CH3COCH3 (aq) + I2 (aq) + HCl (aq)  CH3COCH2I (aq) + HI (aq) the rate law for this reaction is, Rate = k[CH_3 COCH_3 ]^m [I_2 ]^n [HCl]^p. As supported in question 3 part A, the reaction orders m, n and p for acetone, iodine and HCL, respectively were 1, 0, 1. Resulting in an overall reaction order of 2. Manipulations were based on the usage of initial concentrations to calculation the rate constant for the…