The area of chemistry that deals with the study of reaction rates and their mechanisms is called chemical kinetics. Chemical kinetics also helps to define the condition in which the reaction rate can be reformed. Temperature, concentration and catalysts are factors that are considered to affect the rate of a chemical reaction. In this experiment, the objectives are to measure the rate of the decomposition of H_2 O_2 (Hydrogen Peroxide), with the presence of the catalyst KI (Potassium Iodide), determine the kinetic order of both reactants, and find the calculations for the activation energy of the reaction. The pressure above a mixed solution of H_2 O_2 and KI with numerous concentrations and temperatures were observed over four different trials …show more content…
Once the order of reaction is determined, the rate constant k can be calculated by the average of the rate constants from the trials at room temperature. The order of reactions tells which molecular components are present during the rate-limiting step of the reaction. The temperature of the reaction affects the rate constant. This can be seen from the Arrhenius equation for most reactions. As the temperature increases, the rate of the reaction also increases. The formula for this is, k = Ae-Ea/RT. The activation energy, Ea, is the minimum amount of energy needed for a specific reaction to occur, R is the gas constant and T is the Kelvin temperature. The last objective it to find the calculations for the energy of the …show more content…
For trials one and two, 10 mL of KI was place3d in a 20 mL syringe and hooked up to the fitted cork. The flask was then checked to make sure it was sealed, and the stopper was closed. To begin the experiment, the stir plate was turned on to 400 RPM and the KI was injected into the flask for the reaction and all data was captured in Logger Pro. A total of four trials were completed. The first trial was done using original stock solutions. The other three were performed at different starting concentrations of H2O2 and KI for each different trial. After all chemicals were disposed of down the house hold drain with running water, the calculations were done. Rate was calculated in Logger Pro, X and Y were calculated using Rate = [A]x[B]y for two similar trials divided over one
Input variables In this experiment there are two main factors that can affect the rate of the reaction. These key factors can change the rate of the reaction by either increasing it or decreasing it. These were considered and controlled so that they did not disrupt the success of the experiment. Temperature-
The Effect of Temperature on the Action of Peroxidase Enzyme Aim To find the effect of temperature on an enzyme in this case peroxidase, by studying it decomposing hydrogen peroxide. Planning I am measuring the amount of gas given off in the reaction. By collecting this figure I can determine the rate of reaction. If I know the rate of reaction I can find out what temperature peroxidase works best at. Equipment · Trough · Clamp · 100ml measuring cylinder · Stop clock · 10ml measuring cylinder · Delivery tubes · Bung · Conical flask Variables Change
This report discusses the effect of the reactants’ concentration on the rate of the chemical reaction. Based on the results and evaluations, it is proven that the reaction rate increases as the concentration of hydrochloric acid increases. The collected data has shown that the 2 M hydrochloric acid has a faster reaction rate than the 0.5 M acid, due to its larger volume of water displacement. In conclusion, the results obtained from the experiment support the hypothesis stated.
The effect of lowering the temperature on the rates of enzyme activity is a slower reaction rate because the lowering of the temperature would slow down the particles.
In Book I of Nicomachean Ethics, Aristotle states that the ultimate human goal or end is happiness. Aristotle then describes steps required for humans to obtain the ultimate happiness. He also states that activity is an important requirement of happiness. A virtuous person takes pleasure in doing virtuous things. He then goes on to say that living a life of virtue is something pleasurable in itself. The role of virtue to Aristotle is an important one, with out it, it seems humans cannot obtain happiness. Virtue is the connection one has to happiness and how they should obtain it. My goal in this paper is to connect Aristotle’s book of Nicomachean Ethics to my own reasoning of self-ethics. I strongly agree with Aristotle’s goal of happiness and conclude to his idea of virtues, which are virtuous states of character that affect our decision making in life.
All the other lines on the graph, however, are. correspond with my prediction and back it up. As the temperature increases, so does the rate of reaction. If I were to repeat the experiment again, I would work under strict. environment, such as in a closed room with no wind or temperature.
How are Rates of Reactions Measured? In order to change the rate at which a reaction occurs we first must measure the current rate and the rate after we have improved the
I chose this because it is the easier to prepare and will provide the most accurate set of results. Equipment --------- Hydrochloric acid (5cm3) Sodium thiosulphate Paper with black cross on Conical flasks Goggles Water Pipette Measuring cylinder Method To provide fair accurate results it is important to ensure that the same printed cross is used for each experiment.
Before conducting my experiment I will research into, amongst other things, the factors that affect the rate of a reaction. This is so that I may enough information to understand the effect of temperature on the rate of a reaction and also gain appropriate understanding to make a suitable prediction as to what the outcome of my experiment will be.
The temperature at which the reaction is carried out Use of a catalyst Reaction equation is mentioned above but rate equation can only be decided by doing experiments. So, the following procedure can be used to carry out the experiment. Plan Equipment 2 Measuring cylinders Beaker Stopwatch Paper with black cross on it Sodium Thiosulphate (different concentrations) Hydrochloric acid (same concentration each time) Water (different concentrations) Pipette. Prediction I predict that the greater the concentration of sodium thiosulphate solution, the faster the chemical reaction will take place.
• Investigate the effect of temperature on the rate and use the results to find the activation enthalpy for this particular reaction.
AIM: Is to determine the kinetics of a pseudo first order reaction. THEORY The pseudo first order reaction is the reaction that is a second order but can be approximated to be first order under a special circumstances. In the experiment the kinetics of the oxidation of GSH by Cr (VI) is studied at neutral pH, which result in formation of glutathionyl disulfide.
show how different temperatures affect the rate of a chemical. reaction, from this I hope to aim for precise and reliable results. The following reaction is what will happen in my experiment. 2Mg + 2HCl = =
When engaging in this enzyme experiment, there were various steps that were involved in the process of breaking down starch that was present in the fungal and bacterial amylase. First let’s begin by defining what exactly is an enzyme? Well, an enzyme is a biological catalyst that is produced by a cell, thus allowing for these cells to speed up their chemical reactions. Enzymes are very important to us in our everyday lives, they are needed for all our body functions and can be found in our blood, intestinal fluids, the mouth, and stomach. (Vorvick, 2017). This experiment will help us determine if there is any correlation between optimal temperature and catabolization. In order for chemical reactions to occur, the enzyme must lower its activation energy
The aim of this investigation is to: 1) find the rate equation for the reaction between hydrogen peroxide, potassium iodide and sulphuric acid by using the iodine stop clock method and plotting graphs of 1/time against concentration for each variable. Then to find the activation energy by carrying out the experiment at different temperatures using constant amounts of each reactant and then by plotting a graph of in 1/t against I/T, 3) to deduce as much information about the mechanism as possible from the rate equation.