Molarity Of Potassium Iodine

This website was used on October 3, 2014 to help develop a better understanding of collision theory in order to explain the various factors affecting the rate of reaction.

In this lab or experiment, the aim was to determine the following factors of enzymes: (1) the effects of enzymes concentration the catalytic rate or the rate of the reaction, (2) the effects of pH on a particular enzyme, an enzyme known and referred throughout this experiment as ALP (alkaline phosphate enzyme) and lastly (3) the effects of various temperatures on the reaction or catalytic rate. Throughout the experiment 8 separate cuvettes and tubes are mixed with various solutions (labeled as tables 1,3 & 4 in the apparatus/materials sections of the lab) and tested for the effects of the factors mentioned above (concentration, pH and temperature). The tubes labeled 1-4 are tested for pH with pH paper and by spectrophotometer, cuvettes 1a-4a was tested for concentration and cuvettes labeled 1b-4b was tested for temperature in four different atmospheric conditions (4ºC, 23ºC, 32ºC and 60ºC) to see how the enzyme solution was affected by the various conditions. After carrying out the procedures the results showed that the experiment followed the theory for the most part, which is that all the factors work best at its optimum level. So, the optimum pH that the enzymes reacted at was a pH of 7 (neutral), the optimum temperature that the reactions occurs with the enzymes is a temperature of 4ºC or

Enzyme catalysis is dependant upon factors such as concentration of enzyme and substrate, temperature and pH. These factors determine the rate of reaction, and an increase in temperature or pH above the optimum will

Aim: The aim of this experiment is to observe how by increasing the temperature of sodium thiosulfate in a solution with 2.0 molar Hydrochloric acid can affect the rate of reaction and the rate in which a precipitate is formed.

How concentration affects the rate of reaction between Hydrochloric Acid and Sodium Thiosulphate Chemistry Coursework How Concentration Affects a Reaction Aim: The aim of this experiment is to find out how concentration affects the rate of reaction between Hydrochloric Acid and Sodium Thiosulphate. Introduction: This experiment will be carried out by drawing a cross on a piece of paper and mixing hydrochloric acid and sodium thiosulphate together to see if the cross disappears. The concentration of hydrochloric acid would change every reaction to show that concentration effects a reaction.

Three factors that can affect the rate of reaction are temperature, pH and the salinity.

The rate of a chemical reaction often depends on reactant concentrations, temperature, and if there’s presence of a catalyst. The rate of reaction for this experiment can be determined by analyzing the amount of iodine (I2) formed. Two chemical reactions are useful to determining

As seen on table 1, the hypothesis in the introduction of this lab has been supported by the procedures. As the temperature varied from catalases optimal of 37° C, the reaction rate of catalase decreased. 37°C had the highest reaction rate of the three, at 3, while 4°C had the middle rate of reaction at 2.5, and 100° C had the lowest reaction rate of 0.5.

Introduction The purpose of this lab was to test the rate at which the catalyst enzyme reacts and how temperature affects it. Enzymes help to speed up reactions within objects by providing an alternative low energy route for the reaction to occur. In order for a reaction to occur two molecules must collide with each other. The substrate, molecule colliding with the enzyme then locks into it, allowing the enzyme to begin breaking it down.

The slope of this graph, calculated using the average rise / run is also 1. As [S2O8-2] is held constant during these trials, the exponent n for [I-] equals one. The k constant can now be calculated.

Chemical kinetics involving reaction rates and mechanisms is an essential part of our daily life in the modern world. It helps us understand whether particular reactions are favorable and how to save time or prolong time during each reaction. Experiment demonstrated the how concentration, temperature and presence of a catalyst can change the rate of a reaction. 5 runs of dilution and reaction were made to show the effect of concentration on chemical reactions. A certain run from the previous task was twice duplicated to for a “hot and cold” test for reaction rate. The prior run was again duplicated for a test with

was too fast to measure and so for my scale to reach above that, I

To keep this a fair test I have made sure that the acid used is the

Reaction Rates of Sodium Thiosulphate and Hydrochloric Acid at Various Concentrations Introduction/ plan ------------------ I am experimenting into the reaction rates of Sodium Thiosulphate and Hydrochloric acid when under different concentrations. Both Sodium Thiosulphate and Hydrochloric acid are clear solutions but when they react together they produce a cloudy solution, the solution become so cloudy you cannot see through it. To measure the rate of reaction I am going to print off a cross from the computer onto a piece of paper, place it under the beaker with the solution in it and record the time taken for the cross not to be visible. The Symbol equation for my experiment is:

Vent-pipes in cars contain small amount of Platinum-rhodium alloy that transforms toxic emission such as Carbon Monoxide and Nitrogen Dioxide to harmless gas such as Carbon Dioxide. During that process, Catalyst plays an important role in accelerating the gas transformation, in which lowers the activation energy. As an important element in the chemical reaction, catalysts are required in different types of chemical reactions to increase the speed for reaction. During the process of speeding up reaction, the property of catalyst itself will not change as the reaction takes place. But there are other factors could affect the catalytic process, such as temperature, density, or pressure. Besides these factors, is there any other factor that could affect the efficiency of catalytic process? That triggers my interest of investigation. During agricultural use of catalyst, farmers try to change the pH value of fertilizer to control the amount of time seeds need to germinate . Does pH value of solution affect the catalytic efficiency? That becomes next step of investigation. In order to change the pH values of solution but keep the property of solution itself constant. I need to add acid or alkali solution that will not affect with either reactant or product. The acidity of solution is determined by the number of H+ and the alkalinity of solution is determined by the number of (OH)- in the solution. I will find out reactants that do not react with one type of acid and one type of