substance that possess the ability to increase or speed up the rate of reaction without itself being used up in the process. Enzymes provide an alternate reaction pathway by lowering the activation energy needed for a reaction to occur. For two molecules to react they must collide with each other‚ however‚ they have to collide with sufficient energy. Sufficient energy means that between them they have enough energy to overcome the energy barrier to reaction. This is called the activation energy.
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hypothesis proposed that if a small amount of salt was added to the reaction‚ then it cause the rate of the reaction to speed up‚ but if too much salt was added‚ then it will instead decrease the rate of the reaction. The data revealed that no additional amount of salt was the reaction that had the highest rate. As shown previously in the data table‚ the first trial’s average reaction rate of 4.5 mL/min was higher than the other two reaction rates where salt was added for trial 2 and trial3‚ 2.125 mL/min and
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comfortable with. Moreover‚ as “the head of department leads the department in a relatively informal and relaxed manner” may have an impact on the work. However‚ as he says that “I prefer a democratic approach” suggests that he takes into account what the workers have to say but when it comes to decision making‚ he makes the final decision. Anne may not be used to this as in her previous job‚ she was a partner of the company and people would seek solutions as well as recommendations from. Whereas
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Today I will inform my audience of the history of Alzheimer’s ‚ what happens to the brain in alzheimers disease; the stages as well as treatment. Alzheimer’s disease is an irreversible‚ progressive brain disease that slowly destroys memory and thinking skills and‚ eventually even the ability to carry out the simplest tasks of daily living. In most people with Alzheimer’s‚ symptoms first appear after age 60 but it can precent itself sooner. Alzheimer’s disease is the most common cause of dementia
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The Effect of Electrolysis On the Height Increase Rate Of the Palay Plant A Scientific Investigatory Project Presented to the Faculty of the University of St. La Salle Integrated School Bacolod City In Partial Fulfillment of the Requirements of the Subject Science 10 Chemistry By: Ablan‚ Victor Emmanuel P. De la Peña‚ Percival A Penado‚ Keith Nealson M. Puey‚ Patrick Anthony A. Villamor‚ Rex John Theodore Y. 10E i i Acknowledgement In this study‚ the researchers were
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on the Rate of Reaction? By : 22/10/2013 The effect of changing the surface area on the rate of reaction? Unit Question: Should we speed things up or slow them down? Hypothesis: According to collision theory‚ should the surface area increase the amount of collisions increase increasing the rate of reaction. Therefore‚ my hypothesis is that when the surface area increases the rate of reaction increases.
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Aim It is to tell how the reaction between magnesium and hydrochloric acid will be effected if we change the concentration of hydrochloric acid. Introduction In the experiment the magnesium reacts with the hydrochloric acid to create magnesium chloride and hydrogen. The balanced formula for this is: Mg(s) + 2HCL(aq) MgCl2(aq) + H2(g) Magnesium + hydrochloric acid Magnesium Chloride + Hydrogen Magnesium will react with hydrochloric acid‚ because it is higher in the reactivity series than hydrogen
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Effects of Particle Size‚ Temperature‚ Concentration‚ and a Catalyst on Reaction Rate Introduction: Chemical reactions can be affected by a number of different factors. Particle size‚ temperature‚ concentration of a solution‚ and catalysts play a big role in the rate of reaction‚ they determine how fast a reaction will occur. According to the collision theory‚ the rate of reaction depends on the frequency of effective collisions between particles. Every reaction is different in that they all require
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The effect on rate of an enzyme catalysed reaction by different objectives which include effect of substrate‚ temperature‚ ph and effect of a competitive inhibitor phosphate ions. This is determined by the reaction of hydrolysis by p-nitrophenylphosphate (PNP) as a substrate by the enzyme phosphatase. Abstract The hydrolysis of p-nitrophenyl phosphate has been studied in human red blood cells. To see if hydrolysis was related to the functioning of the sodium pump. Acid phosphatase catalysis’s
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Concentration The Problem In many colleges over 8% of the students report problems concentrating on their studies. Most of these students blame outside distractions for their problems. Many research studies manipulating noise levels and distractions have found that such disturbances may increase‚ decrease‚ or not even affect concentration. These researchers have therefore concluded that distracters don’t cause concentration problems directly. It is the way the distracters are interpreted
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