CHM 102 Pre-Lab: Crystal Violet Kinetics Part 3 Name: 1. Why does increasing the

Question

CHM 102 Pre-Lab: Crystal Violet Kinetics Part 3 Name: 1. Why does increasing the temperature usually increase the rate of a reaction? en the emperalvie is increased,The molecul5 increas, rn Speed making a Collision mor eKa-and fre9ventlyroocur 2. The crystal violet reaction has the rate law: rate of reactions kCV' (OH]. State how each parameter changes (increases, decreases, or no change) when the temperature of a reaction b increased m: 3. In measuring reaction rates at different temperatures in this experiment, why are the reactants pre-heated or pre-cooled before mixing them to start the reaction? 4. The data show an initial change in crystal violet concentration (A(CVVAt) with time after mixing crystal violet and OH. From the equation for the trendline, calculate the rate of the reaction, including units. The reaction is CV' + OH' CVOH. y-1.832E-8x+1.013E-5 8% 0.987 CV'] (M) time (s) 5. For the figure in 4, draw a line to show the predicted results if the experiment is repeated at a higher temperature with the same initial concentration of Cv.

Explanation / Answer

1) Increasing temperature usually increases the rate of reaction because due to increased temperature the kinetic energy of reactant molecules become high and they collide with more energy hence decreasing the activation energy gap. This makes the reaction more vigorous and fast.

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