Rate of reaction__temperature[1]

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Rate of reaction__temperature[1]

  1. 1. TOPIC 1. LAB ACTIVITY 2<br />THE EFFECT OF TEMPERATURE CHANGES ON REACTION RATE<br />Silvia Jiménez Álvarez (1º batx.)<br />
  2. 2. INTRODUCTION:<br /><ul><li>Oxalicacidreactswithacidifiedsolution of potassiumpermanganate.</li></ul>Reaction Formula:<br />5(COOH)₂(aq)+6H⁺+2MnO₄⁻ 2Mn²⁺(aq)+10CO₂(g)+H₂O(l)<br />
  3. 3. REQUIREMENTS<br /><ul><li>Selection of syringes
  4. 4. 100 cm³ glassbeakers
  5. 5. Timer
  6. 6. Thermometer
  7. 7. 600 cm³ beaker
  8. 8. Heater
  9. 9. 0,2M oxalicacid
  10. 10. 1M sulphuricacid
  11. 11. 0,02 potassiumpermanganate
  12. 12. Deionisedwater</li></li></ul><li>
  13. 13. PROCEDURE:<br />Usingsyringesadd 5 cm³ of sulphuricacid, 2 cm³ of potassiumpermanganatesolution and 40 cm³ of waterto a 100 cm³ dry, glassbeaker.<br />Heatthe mixture toabout 40°,50°,60°, 70°<br />Place thebeakeron a whitetable.<br />Add 1 cm³ of oxalicacidtothe mixture in thebeaker as soon as possible and at thesame time startthetimer.<br />Gentlystirthereaction mixture withthethermometer.<br />Whenthereaction mixture turnscolourlessstop thetimer and record the time (in seconds). Measure and record thetemperature of thereactionmixture.<br />Workoutthereactionrate.<br />
  14. 14. 2.<br />3.<br />
  15. 15. Change of Colour:<br />
  16. 16. Activities:<br />1. Statetheaim of theexperiment:<br />Theaim of theexperimentisto determine whethertherate of thisreactionisconsistentwiththetemperature.<br />2. Statetwofactorswhichhadtobekeptconstant in theexperiment:<br />Wehadtokeepconstantthevolume of thereactants and thepressure of theglass.<br />3. Howwastherate of thereactiondetermined?<br />Itwasdeterminedbythetemperature of thesolution, ifthetemperature of thesolutionwashigherthantherate of reactionincreased. <br />
  17. 17. 4. Present your results in tabular form:<br />5. Work out the rate of each reaction and add these to your results table.<br />135 40 <br />
  18. 18. 6. Draw a line graph of reaction rate/s¯¹ against temperature/°C.<br />
  19. 19. 7. Statetheconclusion of theexperiment.<br />In conclusion we can state that the higher the temperature the quicker the reaction rate and thus the quicker we have a change in color. <br />

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