Reaction rate

the factor tested to see how it affected the rate of reactions. Tweaking the method for the first experiment, the sodium thiosulphate were in three different temperature; one was placed on a hotplate and heated, another in an ice bath and the last was room temperature. This showed how the temperature of the solution can be an important factor when investigating reaction rates. Concentration of the reactants affects reaction rate by increasing the rate when the concentration is also increased. According

Chemical Background Hydrogen peroxide is a by-product of many reactions that occur within the body – however, it is toxic so needs to be broken down. The equation for this decomposition is as follows: 〖2H〗_2 O_2 → 〖2H〗_2 O+ O_2 In the body, this reaction can be catalysed by the enzyme catalase. Catalase is not removed or used up in this reaction, and speeds up the rate of reaction. It is acting as a catalyst. The decomposition can be catalysed by other catalysts, however, and this is the basis of

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. Since enzymes are proteins, they are subject to denaturation at high temperatures. Catalase is an enzyme present in the human liver and functions at an

Enzymes are substances made of protein that help stimulate chemical reactions. One of the enzymes crucial to human health is lipase. Lipase is one of the vital digestive enzymes released mainly by the pancreas into the small intestine, to help the body process and absorb fats. Lipase is a digestive enzyme that breaks down triglycerides into fatty acids and glycerol. Phenolphthalein is an indicator that is pink in alkaline solutions around pH10. When the pH drops below pH 8.3 phenolphthalein goes

to be able to measure the rate of reaction of peroxydisulfate ion with iodide ion. Students will be allowed to calculate the reaction order, partial order and rate constant of four different reaction solution. Furthermore, observe and record the time when the color changes when KI solution (potassium iodide), starch solution, Na2S2O3 solution (sodium thoisulfate), KNO3 solution (Potassium nitrate) and EDTA solution is mixed in an Erlenmeyer flask. Measuring a reaction rate is not only significant

An Investigation of the Effects of Temperature on the Rates of Reaction of Enzyme Activity Enzymes are important protein macromolecules that act as biological catalysts that catalyse biochemical reactions and speed up reaction rates inside the living systems of plant and animal cells. The practical studies the break down reaction rate of enzymes where the substrate molecule binds and interacts with the complementary enzyme at the active site. For the break down process, activation energy located

A chemical reaction is a process that involves the movement of the molecules in a substance. All chemical reactions involve both reactants and products. Reactants are substances that cause a chemical reaction, and products are substances that are generated in the reaction. The reaction rate for a reactant or product in a particular reaction is defined as how quickly or slowly a reaction takes place. In general, the reactions between covalent compounds are slow. For example rusting of iron. In the

How does the concentration affect the rate of a reaction? 30/1/2012 By Alex Whenman Contents page 1. Introduction to my investigation 2. Background information on concentration 3. What experiment I will be conducting 4. Equipment I will be using 5. How I will be conducting the experiment 6. Heath and safety risk assessment 7. What I think will happen 8. How I will set up my experiment 9. Why I’m having my experiment set out like

1. How does surface area affect reaction rate? 2. How does the mass of an object affect its acceleration? 3.How does the temperature of a solvent affect the solubility of a solute? Variables involved in the investigation Chosen Aim: How does surface area affect reaction rate? What has been discovered previously? By increasing the surface area of the reactant, more particles are exposed to the other reactant. The speed of a chemical reaction can be made faster by increasing

Reaction Rates Calculations Directions: Calculate the reaction rate for the following (reaction rate = volume ÷ time): A. 300 mL of carbon dioxide gas were produced in 20 seconds after mixing baking soda and vinegar. B. 300 mL of carbon dioxide gas were produced in 15 seconds after mixing baking soda and vinegar. C. 300 mL of carbon dioxide gas were produced in 10 seconds after mixing baking soda and vinegar. D. 300 mL of carbon dioxide gas were produced in 5 seconds after mixing baking soda