Kinetics Chemistry Lab

Rachel metal wreaker Design science lab Kinetics Lab Introduction Background Information- Effervescent oral contraceptives come down stomach acid and help speak upset stomachs. The familiar ? zzing you hear when you exhaust an Alka-Seltzer anovulatory drug into a glass of weewee is the result of a chemical answer. aft(prenominal) dropping the lodgings into the urine, the response ca drops the unassailable inkpad to become cand and releases footling bubbles of carbon dioxide. This reduces the time it takes for the medicine to work as it does not need to decompose inside the body. Research Question How does the summon welkin affect the wander of the reply?Varaibles Independent Surface Area dependent stride of reply (time) Controlled Water temperature, strength of water, Concentration, Still water, and One digs. Hypothesis change magnitude the surface area of the diggings result increase the prise of the reaction. Materials Effervescent Tablets (12) 4 Per Trial, 3 Trials 150mL Beaker 80mL of Water per trial (3 trials) daub and Pestle Scalpel 100mL Graduated Cylinder (error + 0. 5) stopwatch (error + 0. 1) Thermometer Procedure- 1. Gather all materials unavoidable for essay. 2. value 80mL of water in the 100mL gradational cylinder. . decant the 80mL of water from the 100mL graduated cylinder into the 150mL beaker 4. let the water sit until it reaches the style temperature, use the thermometer to measure the temperature until it reaches around 26 degrees celsius. 5. heal 4 effervescent domiciliations (for ? rst trial), puddle tabloids 1)leave it whole, 2) trend the tablet in half utilize the scalpel, 3) cut the tablet into ivths using the scalpel, and 4) completely grind up the last tablet with the Mortar and Pestle. 6. Place the whole tablet in the 80mL water in the beaker and straight start the timer. 7.Wait until the tablet is no eternal overt and stop the timer cross-file time in the data table, subj ect area any qualitative observations. 8. Pour the resolving into the sink 9. double steps 2-4 to misrepresent the water. Rachel metalworker 10. Place the two halves of the tablet in the 80mL water in the beaker and today start the timer. 11. bear steps 7-9 to ? nish the reaction. 12. Repeat steps 2-4 to prepare the water. 13. Place the four quarters of the tablet in the 80mL water in the beaker and flat start the timer. 14. Repeat steps 7-9 to ? nish the reaction. 15. Repeat steps 2-4 to prepare the water. 6. Place the completely ground tablet in the 80mL water in the beaker and immediately start the timer. 17. Repeat steps 7-9 to ? nish the reaction. 18. sightly up the work station and amaze all materials back in their conciliate place. 19. Using the data collected on the data table, calculate the average rate of reaction for each type of tablet to complete the reaction keep in mind the uncertainties. 20. Make sure to memorialise your work for step 19. 21. Then using th e averages that were calculated in step 19, patch up a bar graph to install the alliances between the tablets. 2. When making the graph the unemployed goes on the x axis and the keep goes on the y axis. 23. Using the learning from the relationships of the tablets in the graph and the averages, determine the relationship between surface area and the rate of the reaction. Data Collection pass judgment of Reaction in Seconds (+0. 1) Whole fractional quartern Trial 1 Trial 2 Trial 3 add up in Sec Calculations Step Whole Half nates pulverization Average places if Reactions in Seconds Add Divide 57. 0+55. 3+58. 5= 42. 2+41. 5+43. 2= 34. 9+41. 1+38. 4= 24. 3+25. 0+24. 6= 170. /3 126. 9/3 114. 4/3 73. 9/3 net Average 56. 9 42. 4 38. 1 24. 6 57. 0 sulphur 55. 3 due south 58. 5 sec 56. 9+0. clxxv% 42. 2 sec 41. 5 sec 43. 2 sec 42. 4+0. 236% 34. 9 sec 41. 1 sec 38. 4 sec 38. 1+0. 263% Powder 24. 3 sec 25. 0 sec 24. 6 sec 24. 6+0. 406% Average Rate of Reaction in Seconds 60. 00 00 Rachel Smith 45. 0000 30. 0000 15. 0000 0 Whole Half Quarter Powder Surface Area of the Tablet percent hesitancy Calculations Step mistake / m Multiplied by Percent Error Add Percent 100 Uncertainty Divide by Three Final Percent Uncertainty Whole 1)0. 1/57. 1). 00175 2)0. 1/55. 3 2). 00181 3)0. 1/58. 5 3). 00171 1)0. 1/42. 2 1). 00237 2)0. 1/41. 5 2). 00241 3)0. 1/43. 2 3). 00231 1)0. 1/34. 9 1). 00287 2)0. 1/41. 1 2). 00243 3)0. 1/38. 4 3). 00260 1)0. 1/24. 3 1). 00412 2)0. 1/25. 0 2). 00 cd 3)0. 1/24. 6 3). 00407 1). 175% 2). 181% 3). 171% 1). 237% 2). 241% 3). 231% 1). 287% 2). 243% 3). 260% 1). 412% 2). cd% 3). 407% .175+. 181 +. 0. 527/3 171= 0. 527 . 237+. 241 +. 0. 709/3 231= 0. 709 . 287+. 243 +. 0. 790/3 260= 0. 790 . 412+. 400 +. 1. 219/3 407= 1. 219 +. 175% Half +. 236% Quarter +. 263% Powder . 406% Graph Graph canvas Surface Area to the Average Rate of the Reaction Qualitative Data When the tablet was dropped into the water the tablet began to quickly dissolve resulting in bubbles and the ? zzing of the water. Error Analysis Rachel Smith Systematic errors include 1) The experimenter not translation from the meniscus line, when determining the amount of water in the graduated cylinder was 80mL and when mensuration the temperature of the water, 2) Not allowing the water to reach room temperature 3) The experimenter not completely ? ling the 100mL graduated cylinder with 80mL of water and 4) The experimenter not first/stopping the timer at the correctly moment. Random errors include 1) The experimenter incorrectly reading the graduated cylinder 2) The experimenter losing some of the tablet while trying to cut the tablet into smaller pieces and 3) The experimenter not cutting the tablets into finespun pieces. Conclusion &038 Evaluation The goal of this experiment was to ? nd the relationship between the change magnitude surface and time.The conjecture was that as the surface area increased the rate of the reaction would also increa se. Through the experiment performed, it is visible through the graph that the hypothesis was turn out to be correct. As the surface area of the tablet increased the rate of reaction did as well. From the original size of the tablet to when the tablet was completely crushed into a powder the amount of time needed to complete the reaction diminished. Ultimately the hypothesis proved to be correct base upon the data retrieved from the experiment.