higher concentration to those of lower concentration‚ until there is an even concentration. This movement is random because it is a result of kinetic energy. Diffusion is a slow process‚ but there are many factors that will affect it’s rate. The rate of diffusion will vary depending on the size of the particle. For example‚ a smaller particle will move faster than a large molecule at a given temperature . During reactions‚ when there is more energy‚ the reaction will take place at a faster rate. An
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Effect of changes in substrate concentration on the reaction rate of an enzyme IB biology Internal Assessment 3/23/12 Research Question: Effect of changes in substrate concentration amount on the reaction rate of an enzyme Introduction: In this experiment‚ the substrate is hydrogen peroxide. The purpose of this investigation is to find out the relationship between the substrate concentration and the rate of reaction. Substrates are molecules that are acted upon by enzymes. For instance
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Aim: The rate at which a reaction occurs‚ or takes place‚ is affected by various factors‚ such as the temperature at which the experiment is conducted in‚ the pressure which is given‚ the surface area which is exposed‚ use of catalysts‚ and the concentration. In this investigation‚ I would be investigating the affect of surface area‚ or particle size‚ in the rate at which a reaction occurs. Background Information: The more finely divided the solid is‚ the faster the reaction happens. A powdered
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Coursework-Rates of Reactions Introduction Investigating how the concentration of sodium-thiosulphate (STS) and hydrochloric acid (HCL) affects the rate of reaction in the experiment. In addition I am also checking how different variables affect my experiment and also how I can make my test more precise‚ reliable and accurate. Strategy According to my results‚ as the concentration of STS solution increased the rate of reaction of my experiment was increased. Also as the concentration of STS
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change the concentration to what you need. 3.Take note of the amount of water in the measuring cylinder. 4.Put the marble chips and hydrochloric acid into the conical flask. Replace the bung and start the stopwatch. 5.Once the decided amount of time has passed‚ take note of the remaining amount of water in the measuring cylinder. Subtract this number from the one noted down in step three‚ this is the volume of gas produced. 6.Repeat experiment with at least 5 different concentrations of acid.
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examine the final product for the presence for ions. Materials- Sheet of Paper Lead (II) Nitrate Potassium Iodide Deionized Water Filter Paper Charcoal Matches Equipment- Clean dry spatula Small Beakers Glass stirring rod Ring stand Funnel Tweezers Bunsen Burner Small Test Tubes Safety- During this lab we are dealing with some dangerous chemical including Lead Nitrate‚ Potassium Iodide. In this lab you will need to be wearing safety goggles at all times and closed toed shoes and for people that
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investigate the effect of temperature on an enzyme controlled reaction Introduction and planning For the investigation of enzymes‚ I am going to conduct an experiment to see how temperature can affect the rate of reaction of enzymes by testing it with starch. The enzyme that we are going to use is called amylase. We are going to test this enzyme with starch. By mixing amylase and starch solutions together under different temperature conditions‚ we can record the rate of reaction by taking a sample out
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Investigation How does the concentration of the sodium thiosulfate affect the rate of reaction to hydrochloric acid? contents page 1: contents‚ aim‚ prediction‚ equation‚ diagram page 2: equipment‚ preliminary experiments page 3: page 4: page 5: page 6: page 7: page 8: Aim: In my investigation I am trying to find out how the rate of reaction between sodium thiosulfate and hydrochloric acid gets affected but the concentration of the thiosulfate. Prediction: My prediction is that the increased
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Affecting Rate of Reaction Introduction Hydrogen Peroxide (H2O2)‚ is the most simple peroxide and commonly used in several household items such as toothpaste or as an alternative to bleach. However hydrogen peroxide it is a very dangerous substance when accumulated in large amounts. If that situation occurs this substance must be decomposed. But how can we decompose this reaction? Well it decomposes by itself very slowly (2H2O2(aq) -> 2H2O(l) + O2(g))‚ but that would take too long. This reaction can
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+CO2 (g) In this experiment‚ I am going to see if temperature affects the reaction rate between marble chips and hydrochloric acid by timing the release of carbon dioxide in the reaction. I predict the higher the temperature‚ the faster the reaction rate. This is due to the kinetic theory. The more heat that is given to matter‚ the faster the particles move. This happens in the acid‚ so the faster the particles move‚ the faster the reaction rate due to more collisions between the marble chips and
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