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    Chemistry Investigation

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    called the collision theory, which I will discuss in greater depth later.  Whether or not there is a catalyst. A catalyst speeds up the rate of reaction and remains chemically unchanged by the end of the experiment. A catalyst lowers the activation energy. This is the energy needed to start a reaction. The variable that I have decided to change is the temperature. I have decided to alter the temperature of the yeast and time the amount of carbon dioxide that will be given off at different

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    successful and give a product while others don't because particles don't have enough energy. Activation energy - The amount of energy needed for the reaction to be started. If there is enough energy then the reaction takes place and a product is formed, but if there isn't enough then no reaction takes place. There are two possibilities for increasing the rate of reaction: 1. The activation energy is reduced so that there is a better chance of particles having enough energy to react

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    is because I know that the higher the temperature the faster the particles will move. This is because the particles have more energy. When the particles have more energy there is more likelihood of a collision between particles, with enough activation energy for a reaction to successfully take place. Apparatus ========= · Test tubes · Thermometer · Beakers · Chronicle flask · Measuring cylinders · Tripods · Heat proof mats · Bunsen burner Method To do

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    com) Within psychotherapy there are multiple types of therapy that are under the term psychotherapy, one of those being Behavioral Activation Therapy. Behavioral activation comes from the work of Peter Lewinsohn. "Starting in 1964, Dr. Lewinsohn’s research interests began to focus on the topic of depression" (ORI) There are core principals in Behavioral activation; a few of those are, structure and schedule, changing how one feels by changing what they do, and change will be easier

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    Rate of Reaction

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    rate of reaction. This is because for two substances to react they have to have a successful collision which means the have to collide with a minimum amount of energy which is called the activation energy. This diagram shows how the particles will react with each other with the minimum amount of energy (activation energy): The higher the temperature of the acid the faster the acid particles will be moving around as they’ll have more energy and there will more collisions. This energy will also allow

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    there are less reactions. What constitutes an effective collision? In order for a molecular collision to be effective it must meet two conditions: þ The collision must have sufficient enough impact energy to overcome the Activation Energy. The Activation energy is the minimum energy necessary for product to form. This impact energy must be sufficient so that bonds can be broken within the reactant molecules and new bonds formed to produce the products. þ The molecules must have

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    hydrochloric acid. Prediction ---------- I think that increasing the concentration will increase the rate of reaction. This is because in order for a chemical reaction to occur particles must collide with sufficient energy to react. This is the activation energy. If the particles do not have enough energy when they collide, they simply bounce off each other. [IMAGE] If two particles move towards each other without the sufficient energy… [IMAGE] [IMAGE] [IMAGE] …when they

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    room is below 20 C the particles will still be moving, but very slowly. This would cause the react to be very slow. At temperatures above 20 C the particles will be moving at a regular speed. Low Concentration High Concentration Activation Energy Activation energy is the energy needed to start a reaction. Each molecule has a certain amount of energy, when molecules collide they have to collide with more energy than they already have in order to react this is called a successful collision

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    Rates Of Reaction

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    fisses and then disappears giving of hydrogen as it fisses and it leaves behind a solution of hydrogen chloride. The activation energy of a particle is increased with heat. The particles which have to have the activation energy are those particles which are moving, in the case of magnesium and hydrochloric acid, it is the hydrochloric acid particles which have to have the activation energy because they are the ones that are moving and bombarding the magnesium particles to produce magnesium chloride

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    if the activation energy changes depending on whether a strong or weak acid is used. I will also be investigating whether or not there is a change in the order of reaction if a dibasic acid is used instead of a monobasic acid. Planning This investigation is therefore split up into separate experiments. Experiment 1 is to find the activation energy for the reactions between hydrochloric acid and magnesium ribbon, then ethanoic acid and magnesium ribbon. The only way to find the activation energy

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