I. The effect of temperature on the rate of reaction.
15C
25C
35C
45C
g/min
0. 15
0. 225
0. 325
0. 475
Table 1: Average Reaction Rate (due to Temperature change) When the temperature increases particles collide more frequently, so more chemical reactions occur in a shorter amount of time. Also, increasing the temperature gives the particles more energy. So when the molecules collide, chemical bonds are more likely to break, and the atoms in the reactants can rearrange more easily to form products. Looking at the results that were collected (shown in Table 1), we are able to deduce that the effect of temperature on the rate of reaction is proportional; that is, if the temperature increases, the average rate of reaction increases as a result.
II. The effect of concentration of reactants on the reaction of rate.
Average Rate of Reaction 1molL HCl 2molL HCl 4molL HCl 6molL HCl g/min 0. 2 0. 7 1. 03 1. 23 Table 2: Average Reaction Rate (due to Acid Concentration change) When the acid concentration increases, particles are more likely to collide when they are highly concentrated. Collisions between particles are necessary to allow the bonds to break and new bonds to form. Looking at the results that were collected (shown in Table 2), we are able to deduce that the effect of acid concentration on the rate of reaction is proportional; that is, if acid concentration increases, the average rate of reaction increases as a result.
III. Rates of reaction at the beginning, the middle, and the end of a reaction Temperature 15C As we can see, the rate of CO2 produced is a steady rising state. From the graph, we can deduce that the time of highest production was between 180 and 200 seconds. The slowest rate was during times 0 and 20 seconds.
25C The line again, rises in a steady state, with a brief flat from 120 to 140 secs, after which it continues to rise steadily. The fastest rate was during the times 20 and 40 seconds, with the slowest rate being from 120 to 140 seconds.
35C In the first 20 seconds, the rate of production jumps, after which the line increases steadily from 20 to 80 seconds. This then it starts to slow down...
