To investigate the factors that affect rate of reaction Essay Example for Free

To investigate the factors that affect value of reaction EssayI lead pour one lot into the glass phial, I leave behind then measure break through five distinguishable concentrations of acid. I will do this by victimization a two bomber acid and will vary the ratio of water, the combinations will be venereal infection piss 25 ml 0 ml = 2 wedge 15 ml 5 ml = 1. 6 molar 12. 5 ml 12. 5 ml = 1. 2 molar 10 ml 15 ml = 1 molar 5 ml 10 ml = 0. 8 molar Then I will pour the two molar acid into the phial, put the shilling on and start the timer as soon as the cork is in go under, so we ar able to start timing when gas is being collected and not before as this would dupe it an invalid result of the first ten seconds. I will quote this process for each concentration. later each experiment I will rinse out the phial, to make sure the stain chips custom start reacting before I pour the acid in. I will record the measurement from the spray e very ten seconds by folding the pipa ge over to stop the gas from escaping through, and will leisure the syringe of gas after each experiment. Trial Run Below is a results table viewing our first trial run of our plan of action so I can see if anything need changing. Concentration g/dm3 Time (s) 2 molar 1. 6 molar 1. 2 molar 1 molar 0. 8 molar.These results do follow the pattern predicted so I will not metamorphose my plan of action for the real experiment. Apparatus . 5 measuring cylinders to measure out the different concentrations . Water . 2 molar acid . syringe to measure the gas produced . 5 lots of sm altogether marble chips each weighing 2. 5 grams . Electronic weighing scales to weigh out the marble chips.5 beakers to donjon the marble chips . Rubber tube with a cork attached to capture the gas produced . A phial to hold the marble chips with the acid whilst reacting . Stop clock to take readings every 10 seconds Fair screen out I will make sure it is a fair test by rinsing out the phial after each react ion has interpreted place so the next lot of marble chips wont start reacting before the experiment begins. I will utilize the very(prenominal) bottle of 2 molar acid to make sure I dont engage slightly different concentrations and will usurp the experiment three times to get a good average of the results.Also I will use the like measuring cylinders so I will be measuring to the same nearby ml each time. Method . Make sure you afford all the equipment stated in weapon list . Weigh out five lots of 2. 5g of marble chips . Measure out the five different concentrations . Pour one lot of marble chips into the phial . Pour acid in the phial with the chips and place on the cork . As soon as cork is in place start the stop watch . Every 10 seconds record the gas measurement from the syringe . Rinse out the phial and repeat for each concentration . Record all results on a table SAFETY BOX.Wear goggle and aprons to protect from acid spillage . Keep lid on acid when not in use . Make sure bags and coats are out of the way Results Concentration g/dm3 Time (s) 2 molar 1. 6 molar 1. 2 molar 1 molar 0. 8 molar Concentration g/dm3 Time (s) 2 molar 1. 6 molar 1. 2 molar 1 molar 0. 8 molar Average Results Here is a table showing the average of the three sets of results that I have recordedConcentration g/dm3 Time (s) 2 molar 1. 6 molar 1. 2 molar 1 molar 0. 8 molar Results Table for Rate Of CO2 Production Concentration g/dm3 ( Rate Of CO2) Time (s) 2 molar 1. 6 molar 1. 2 molar 1 molar Evaluation Overall I think that my results are reliable but not as completed as they could be. Reasons for this are that the measuring cylinder for measuring the acid and water was only accurate to 0.5ml and the syringe to measure the production of CO2 gas was only accurate to 1ml, or more with the human meat reading it. The balance to weigh out the small marble chips was very accurate to 0. 01g but there was no guarantee that the surface area was the same which will have affected th e results. Starting the stopwatch at exactly the same time for each experiment was impossible and will have vary each time affecting the first 10 second readings. In my supposition I mentioned approximately temperature effecting the rate of a reaction, and the room temperature wasnt the same each day during the experiment so this will to a fault have added inaccuracys.Due to human error the gas may have leaked out through the tube whilst we were trying to read from the syringe resulting in us reading more then what we should have. With all this taken into account I have concluded that although my results follow the patterns and trends predicted they arent very accurate. If I was to do the experiment again then I would have the same amount of marble chips as well as the same weight as this would make the surface area more accurate. I would also do the experiments all in one day so that the temperature would be roughly the same.Also I would probably use a different method of track ing the locoweed instead of displacement. I would do this because although displacement is very clear and simple, it can also be very inaccurate and is read through the human eye, whereas mass loss would be done with a machine and would be extremely accurate. I have undercoat no anomalous results as each graph follows the trends and patterns expected. My graphs clearly illustrate that my theory was correct. The collision theory in particular as this was the factoral that we were changing (concentration).The higher the molarity the more particles there were in the same volume of water so the swift the reaction. As you can see from my graphs that the higher the molarity went the faster the gas was produced. Conclusion In conclusion the experiment went very well and I have prove that my theory was correct and that my results are reliable. You can see this from the graphs present. Show prevue only The above preview is unformatted text This student written piece of work is one of ma ny that can be open in our GCSE Patterns of Behaviour section.