Catalytic Decomposition of Hydrogen Peroxide by Potassium Iodide Brief Description: Two solutions are mixed resulting in an eruption of foam resembling a huge stream of toothpaste. This is the classic “Elephant Toothpaste” reaction. Purpose/Goal: Procedure presents an example of a catalyzed reaction. Explanation of Experiment: The rapid evolution of oxygen gas is produced by the following reaction: 2 H2O2 (aq) = 2 H2O (l) + O2 (g) + heat The decomposition of hydrogen peroxide
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MATLAB Programs 1. Chapter No. Two Program 2.1 MATLAB m-file for the Bisection Method function sol=bisect(fn‚a‚b‚tol) f a = f eval(f n‚ a); f b = f eval(f n‚ b); if f a∗f b > 0; fprintf(’Endpoints have same sign’) return end while abs (b − a) > tol c = (a + b)/2; f c = f eval(f n‚ c); if f a ∗ f c < 0; b = c; else a = c; end end; sol=(a + b)/2; Program 2.2 MATLAB m-file for the Fixed-Point Method function sol=fixpt(fn‚x0‚tol) old= x0+1; while abs(x0-old) > tol; old=x0; x0 = f eval(f n‚ old);
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Lab 5 DECOMPOSITION (Nov 2‚ 2011) Introduction: Decomposition is the breakdown of organic material into its smaller molecules and elements. (This term is generally considered as a biotic process but one may find it also used to describe an abiotic process‚ e.g.‚ due to weathering.) The decomposing organisms may use the release of elements for nutrients and by breaking apart the carbon-carbon bonds in organic matter this can release energy for them. These smaller molecules and nutrient elements
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Chapter 10 Phase Transformations in Metals: development of microstructure and alteration of mechanical properties 1. Phase Transformations: a change in the number and/or character of the phases that constitute the microstructure of an alloy *phase: a homogenous portion of a system that has a uniform physical and chemical make up. *Stages of phase transformation 1. Nucleation: the formation of very small particals‚ called nuclei‚ of the new phase‚ which are capable of growing. 2. Growth: The
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Abraham Lincoln once stated‚ “Nearly all men can stand adversity‚ but if you want to test a man’s character‚ give him power.” One key term in Lincoln’s statement is adversity‚ which defines as a state of serious difficulty‚ misfortune‚ or tragedy. In his utterance‚ power stands as another important term‚ which means political control‚ authority‚ or influence over an area or people. Across the board‚ Lincoln hints that power changes a man more than hardship does. Furthermore‚ Lincoln implies in his
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This experiment will investigate the factors that affect the rate of reaction of the enzyme catalyse‚ an enzyme found in food such as potato and liver. Catalyse is used to remove hydrogen peroxide from cells. The enzyme speeds up the rate of decomposition of hydrogen peroxide into water and oxygen. The reaction is: Catalyse is able to speed up the process because the enzyme lowers the activation energy of the reaction. This means that the free energy required for the reaction to take place
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-------------------------------------------------------------------------------- Zinc and hydrochloric acid In the lab‚ zinc granules react fairly slowly with dilute hydrochloric acid‚ but much faster if the acid is concentrated. The catalytic decomposition of hydrogen peroxide Solid manganese(IV) oxide is often used as a catalyst in this reaction. Oxygen is given off much faster if the hydrogen peroxide is concentrated than if it is dilute. The reaction between sodium thiosulphate solution
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Kinetics of the Decomposition of Hydrogen Peroxide Lab Introduction: In this week’s lab experiment‚ the rate of decomposition of hydrogen peroxide forming oxygen gas will be observed and studied. Since the rate of a chemical reaction is dependent on two things; the concentrations of the reactants and the temperature at which the process is performed‚ the rate can be measured at which a reactant disappears or at which a product appears. When measuring the rate‚ the rate law will be applied. The
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Determination of the Enthalpy for Decomposition of Hydrogen Peroxide Objective: To construct a coffee cup calorimeter‚ measure its calorimeter constant‚ and determine the enthalpy of decomposition and formation of hydrogen peroxide. Background: This experiment is a classic thermodynamics lab. In it‚ we attempt to measure the enthalpy (H) of a chemical reaction. The main obstacle is that this is a quantity that cannot be measured directly. It instead is observed as heat from one substance is transferred
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import numpy as np import scipy as sp import matplotlib.pyplot as plt import scipy.linalg as la import scipy.io as sio D = sio.loadmat("baseball_data.mat") # X represents the total number of wins per team X = D["X"].ravel() # Y represents the total payroll per team Y = D["Y"].ravel() # The number of rows of matrix A m=X.size #by sorting the value of X‚ I realized that the minimum value in X is 672 and the maximum is 956‚ so I made the plotting range for x-axis from 650 to 1000
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