Factors affecting rate of chemical reactions
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Factors affecting rate of chemical reactions
- 1. Experiment No. 4 Factors Affecting Rate of Chemical Reactions
- 2. Objectives: To show the effects of the different factors in the rate of a given chemical reaction
- 3. Procedure: Nature of Reactants Compare the speeds of the following sets of reaction and write the corresponding equations:
- 5. Experiment No. 2 dilute KmnO4 dilute H2SO4 test tube 1 test tube 2 acidified with dilute KmnO4 acidified with dilute H2SO4 1mLof hydrogen peroxide
- 6. Experiment No. 3 3mL0f 6NHCl test tube 1 test tube 3 test tube 2 3mL0f 6NHCl 3mL0f 6NHCl
- 7. Experim ent No. 3 test tube 1 3mL0f 6NHCl 3mL0f 6NHCl 3mL0f 6NHCl test tube 2 test tube 3
- 8. Experim ent No. 3 test tube 1 3mL0f 6NHCl 3mL0f 6NHCl 3mL0f 6NHCl test tube 2 test tube 3½gramof Zn granules ½gramofAl 1pieceofmagnesiumriboon Record the time for Al and Magnesium to be consumed.
- 10. Experiment No. 1 2mL hydrogen peroxide apinchof manganese dioxide test tube 1 test tube 2 2mL hydrogen peroxide Compare the rate at which decomposition of hydrogen peroxide takes place in the two test tubes.
- 11. Experiment No. 2 5mLof 6NHCl 3mLof 1%MnSO4 test tube 1 3mLH2O test tube 2 5mLof 6NHCl
- 12. Experiment No. 2 5mLof 6NHCl 3mLof 1%MnSO4 test tube 1 3mLH2O test tube 2 5mLof 6NHCl
- 13. Experiment No. 2 5mLof 6NHCl 3mLof 1%MnSO4 test tube 1 3mLH2O test tube 2 5mLof 6NHCl stripof magnesium ribbon stripof magnesium ribbon
- 14. Procedure: Concentration of Reactants
- 15. Experiment No. 1 3mL0f 3NHCl test tube 1 test tube 3 test tube 2 3mL0f 6NHCl 3mL0f 12NHCl
- 16. Experiment No. 1 3mL0f 3NHCl test tube 1 test tube 3 test tube 2 3mL0f 6NHCl 3mL0f 12NHCl apieceof magnesium ribbon apieceof magnesiumribbon apieceof magnesium ribbon
- 18. 3mLof0.1N sodium oxalate 3mLof KmnO4 test tube 1 test tube 2 3mLof0.1N sodium oxalate acidified with fewdropsof diluteH2SO4
- 20. Procedure: Surface area of Reactants
- 21. 3mLof 6NHCl test tube 1 test tube 2 3mLof 6NHCl folded magnesium ribbon flatstrip magnesium ribbon
- 22. 3mLof 6NHCl test tube 1 test tube 2 3mLof 6NHCl folded magnesium ribbon flatstrip magnesium ribbon
- 23. Observation and Results: Nature of Reactants Compare the speeds of the following sets of reaction: Experim ent No. 1 The solution in the second test tube has no reaction after adding a few drops of disodium phosphate The solution in the first test tube has the faster reaction after adding a drop of BaCl2
- 24. Observation and Results: Nature of Reactants Compare the speeds of the following sets of reaction: Experim ent No. 2 The reaction in the first test tube occur faster upon adding hydrogen peroxide. The reaction in the second test tube occur fast.
- 25. Observation and Results: Nature of Reactants Compare the speeds of the following sets of reaction: Experim ent No. 3 The fastest reaction is in the 2nd test tube with a piece of magnesiu m ribbon The reaction in the 3rd test tube is slow upon adding ½ gm of Al. In the third test tube with Zn, the reaction is faster than in the 3rd test tube.
- 26. Observation and Results: Catalyst Determine the rate of decomposition of H2O2 that takes place into the two test tubes. This maybe determined from the rate of evolution of oxygen gas. Experim ent No. 1 The decompositi on in the 2nd test tube is faster upon adding manganese dioxide.
- 27. Observation and Results: Catalyst Time the reaction.Experim ent No. 2 in the 1st test tube, the magnesium ribbon was consumed more rapidly which occured in only 1min. in the 2nd test tube, the magnesium ribbon was consumed after 3mins.
- 28. Observation and Results: Concentration of Reactants Compare the reaction rates by noting the rate of evolution of hydrogen gasExperim ent No. 1 The fastest reaction is in the 2nd test tube with a piece of magnesium ribbon which reacted in less than 1min. The reaction in the third test tube is slow and it begun after 5mins. The magnesium in the 1st test tube reacted after 3mins. The reaction is moderate
- 29. Observation and Results: Temperature Observe the change in color and record the time of the reaction.Experim ent No. 1 In 2nd test tube, the color also changed from violet to colorless for only 3mins. upon heating at 75C. In the 1st test tube, the color suddenly change into violet upon adding the potasium permanganat e solution.
- 30. Observation and Results: Surface Area of the Reactants Record the time of the reaction. Experim ent No. 1 The flat strip of magnesium ribbon reacted in less than 1min the coiled strip reacted after 1min.
- 31. Generalization: There are five factors that effects the rate of chemical reaction: 1. Nature of Reactants. There are chemicals that are more active than others. These can change the speed of the reaction. 2. Presence of Catalyst. Adding catalyst in the solution increases the rate of reaction but the speed depends on the solution where the catalyst is added.
- 32. Generalization: There are five factors that effects the rate of chemical reaction: 3. Concentration of Reactants. Increasing the concentration of reactants also increases the rate of reaction because the no. of possible collisions also increases. 4. Temperature As the temperature rises, the collision frequency and the collision efficiency increases.
- 33. Generalization: There are five factors that effects the rate of chemical reaction: 5. Surface Area of Reactants Increase in surface will increase reaction rate because greater no. of reactant will come in contact with each other.
- 34. Prepared and presented by: Abigail M. Sapico