Rate of reaction Essay Example for Free

Rate of reaction EssayApart from these few improvements I think the equipment and the method I used was an appropriate centering of investigating how tightfistedness effects the browse of reaction on an enzyme. A variable that I could try for an extra experiment is temperature. I could try increase the temperature of the catalase to see if increasing the temperature has the same effect on an enzyme as it does with concentration. This would help me to see which variable, temperature or concentration has a greater effect on the passel of oxygen produced from the reaction of an enzyme. I am going to work out the rate of reaction from the number value of all(prenominal) of the concentrations of hydrogen hydrogen bleach. I forget work out the rate of reaction for every 10 second from the average values by using my represents. chemical reaction Rate for the concentration of Reaction Rate for the concentration of 6%cm3/s From looking at these calculations I can say that for a ll the concentrations of hydrogen peroxide the reaction rate was alacritous at the start of the reaction.During the reaction the rate decreased and eventually the reaction stopped. I can explain this by using the lock and key model. This occurs because the catalase is shift the particles of the hydrogen peroxide to form into oxygen. This causes the hydrogen peroxide to get used up as the catalyst can alter the rate of reaction without get used up.This then leaves the catalase to react with no substance. Data Logging Data logging is another experiment I did to extend my experiment. I looked at the enzyme performance experiment in a different way. This sequence I used the same quantity of catalase and hydrogen peroxide but instead of measuring the passel of oxygen produced, I found out the temperature increase for each of the different concentrations of hydrogen peroxide. Method 1. Collect all equipment and set the experiment up 2. acquit safety glasses as you be using chemica ls 3. Pour 25cm3 of each concentration of hydrogen peroxide into a measuring cylinder4. Pour each concentration of hydrogen peroxide into three different polystyrene loving cups 5. Measure 1mm of catalase into three different syringes 6. Make sure that the end of the probe is touching the bottom of the cup and that the hydrogen peroxide is completely covering it 7. Inject all three of the catalase at the same time into each polystyrene cup 8. At the same time start the computer as you inject the catalase, to start of the measurement of the temperature, of the hydrogen peroxide 9. Watch how the computer measures the temperature for 2minutes as it transfers all the information into a graph 10.Stop the graph at 2 minutes and print out the results Conclusion From my results I can see that the 6% concentration of hydrogen peroxide has presumptuousness of the highest temperature. This is because the concentration of 6% has legion(predicate) particles of hydrogen peroxide which will have a greater chance of colliding with the catalase. The concentration of 1. 5% and 3% has given of less heat causing a lower temperature. This is because they have less particles of hydrogen peroxide to collide with the enzymes. This result can be explained by the energising and collision theory. The increase in heat gave an increase in the kinetic energy.This means that there would be more collision between the hydrogen peroxide particles and the catalase, which would lead to a better chance of collision being successful. This experiment is related to my first experiment as the increase in concentration gave away more oxygen which gave us an increase in temperature. I found out that the 6% concentration gave of the most oxygen which causes a rise in temperature and the 1. 5% gave of the least oxygen causing a lower temperature. The 6% also gave off the most oxygen in the shortest time whereas the 1. 5% concentration gave off the least oxygen in the longest time.From looking at my g raph I can see that the 6% concentration had the steepest pitch which if I relate back to my rates of reaction theory. I can say that the steeper the slope the faster the reaction. The 1. 5% concentration had the smallest gradient which means it had the dilatory rate of reaction. Overall this proves my original prediction, that the 6% concentration of hydrogen peroxide has the fastest rate of reaction and the 1. 5% concentration has the slowest. Reaction Rates During a reaction, reactants are being used up and products are forming. The reaction rate tells us how fast the reaction is taking place.You can calculate the reaction rate by measuring how a lot reactant is used up or how much product forms in a given time. Reaction rate = change in amount of a substance time taken The reaction rate can also be calculated by using a graph. The slope of the graph tells us how quickly the reaction is happening. The steeper the slope, the faster the reaction Results from the Trial Experiment Time (s) batch of O2 evolved (cm3) 1. 5% Volume of O2 evolved (cm3) 3% Volume of O2 evolved (cm3) 6% Average I did a trial experiment to help me understand the experiment.The trial experiment showed me how quickly each concentration of hydrogen peroxide produced the amount of oxygen gas in one minute. I also learnt that slow pressure is needed with the small gas syringe because too much pressure causes the catalase to spill out. Results from the concentration of 1. 5% Time(s) oxygen evolved (cm3)oxygen evolved (cm3) oxygen evolved (cm3) oxygen evolved (cm3) oxygen evolved (cm3) oxygen evolved (cm3) average.I am going to use columns 5,6 and 7 for my average because these columns have the nearest results to each other and the range of results are realistic. Results from the concentration of 3% Time(s) oxygen evolved (cm3) oxygen evolved (cm3) oxygen evolved (cm3) oxygen evolved (cm3) oxygen evolved (cm3) average 1 I will be using columns 4,5 and 6 for my average because these col umns have the nearest results to each other and the range of results are realistic. Results from the concentration of 6% Time(s) oxygen evolved (cm3) oxygen evolved (cm3) oxygen evolved (cm3) oxygen evolved (cm3) average.I will use column 2,3 and 4 for my average because these columns have the nearest results to each other and the range of results are realistic. Time (s) Temperature (oC) 1. 5% Temperature (oC) 3% Temperature Show preview only The above preview is unformatted text This student written piece of work is one of many that can be found in our GCSE Patterns of Behaviour section.