Chem Essay

1321 WordsJul 23, 20126 Pages
Prac 7 Factors affecting the rate of reaction Intro The factors that affect the rate of a chemical reaction are important to understand due to the importance of many such reactions to our health, well-being The rate of a reaction is governed by the collision theory. In order for a reaction to occur, there must be a collision between reactant molecules. This collision must have enough energy to break and form the appropriate bonds as well as have the correct orientation when colliding. When all of these things happen, a chemical reaction has occurred. If we can increase the amount of these favourable collisions, then we increase the rate of the reaction.(1) and comfort. Purpose/Objective: The aim of this lab is to observe the effect of temperature and concentration on the rate of a chemical reaction. Procedure: Please refer to Heinemann Chemistry 2 student workbook pg. 138-140 Calculations: Please refer to prac sheet for full calculation Evaluation: One of the factors that affects reaction rate is reactant concentration. The more reactant molecules in a given area, the greater the number of collisions possible, when the concentration increases from 0.05 M to 0.125 M to 0.2 M, the rate of reaction will increase, the less time taken for the “X” mark to disappear. Another factor that affects the rate of reaction is temperature. As temperature increases from 17C to 40C to 60C time for cross to disappear decreases, hence the reaction speeds up but this finding is to be expected because increasing temperature of solution means reactants are moving faster .they collide more frequently and with more energy. They have more chance of overcoming activation energy and reacting. Improvement and Limitation: There were some problems when we were doing this experiment and these errors have produced a minor uncertainty in our experiment. * It was difficult to

More about Chem Essay

Open Document