Notes Enzymes: What must occur for a reaction to proceed? Collision Theory: 1. Reactants must collide 2. Reactants must have enough energy 3. Reactants must hit with proper orientation Here is morbid example of collision theory. How do a train and school bus react to give a train with engine damage and a school bus in two pieces? [pic] If you look back to the three conditions required for a reaction to occur, we can relate them to his terrible accident. In the collision theory, condition
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Chemistry Extended Essay “How does pH affect the concentration of trihalomethanes formed in a sample of reservoir water when it is disinfected with chlorine or chloramine and to what extent do both chloramine and free chlorine decompose when exposed to ultraviolet light?” Abstract This investigation aims to find out how pH affects the concentration of trihalomethanes formed in a sample of reservoir water when it is disinfected with chlorine or chloramine and the extent to which both
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2.3 Fuel Cell Stack Leela manohar et al. [13] studied the influences of gas pressure and flow rate parameters on fuel cell performance. The fuel cell was operated at various pressure and flow rates that were regulated by mass flow controllers placed upstream of the stack. In this study, four types of control factors considered were: pressures of the fuel and oxidant and the flow rates of the fuel and oxidant to select optimize condition for fuel cell operation. Each factor has two levels, leading
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Discussion: The purpose of this lab was to investigate the effects that the intermolecular forces of different sized alcohols had on temperature decrease during evaporation. This was investigated using a thermometer to measure the initial temperature of a cotton ball containing 10 drops of an alcohol and its final temperature after 3 minutes of evaporation. It was hypothesized that Butanol, the largest molecule and the one with the strongest bonds, would experience the least temperature decrease
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that, we covered it with Parafilm and then began to mix. The next step to the experiment is to observe. After every five minutes, we would observe the color of the reaction , and whether it changed. RESULTS: The information we gathered demonstrates our speculation since it demonstrates that the quickest enzymatic response rate happens when the turnip peroxidase focus is 2%. Our information demonstrates the test tube with 2% peroxidase achieving 100% oxygen in just two minutes instead of more
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acid-catalyzed reaction of bromine and acetone via initial rate measurements and isolation method in order to approach the reaction mechanism. Data and discussion: The initial reaction of the production of brominated acetone can be written as: CH3COCH3 (aq)+ Br2 (aq) ---→CH3COCH2Br(aq) + Br– (aq) + H+ (aq) Data table Trial | Saturated Br2 solution (mL) | Acetone(mL) | 1.00 M HCl(mL) | Initial rate(abs/min) | [Ac](M) | [HCl](M) | Mole/L Br2 reacting per min per liter | Rate constant(M-1
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Investigation of the Rates of Reaction By Gabriella Azanu 11A Introduction A chemical reaction is when a material is changed from a beginning mass to a resulting substance through the addition of one or more other substances. In a chemical reaction, at least one or more new substances are created and the beginning mass disappears in order to make the new mass. In a chemical reaction however, mass is neither lost nor gained so the resulting
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CHEMICAL KINETICS PRACTICE EXAMPLES 1A (E) The rate of consumption for a reactant is expressed as the negative of the change in molarity divided by the time interval. The rate of reaction is expressed as the rate of consumption of a reactant or production of a product divided by its stoichiometric coefficient. A 0.3187 M 0.3629 M 1min rate of consumption of A = = = 8.93 105 M s 1 t 8.25 min 60 s rate of reaction = rate of consumption of A2 = 8.93 105 M s 1
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Purpose: To determine the rate law for the oxidation of I^-1 by S2O8^-2 in aqueous solution and the effect of concentration on the rate of the reaction by studying the initial reaction rate at different reactant concentrations. Also, to examine the effect of a catalyst and the effect of temperature on the reaction rate in order to calculate the activation energy (Ea). Procedure: Use the dropper bottles containing starch, Na2S2O3, KI, and KNO3 to add the appropriate number of drops (indicated
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CAcT HomePage Rate and Order of Reactions Skills to develop Derive the integrated rate laws from differential rate laws. Describe the variation of concentration vs. time for 1st order reactions. Describe the variation of concentration vs. time for 2nd order reactions. Figure out order of reaction from concentration vs. time plots. Rate and Order of Reactions The rate of a chemical reaction is the amount of substance reacted or produced per unit time. The rate law is an expression indicating
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