Purpose: To see how the presence of catalyst changes the rate of reaction.
Hypothesis: If the rate of reaction is related to the presence of a catalyst then, the presence of a catalyst will make the rate of reaction faster.
Independent Variable: Presence of a catalyst
Depend variable: Rate of reaction
Controlled Variables: Amount of catalyst added type of catalyst used
Materials:
4 beakers
3 pieces of paper
Dish Soap
6% hydrogen peroxide solution (H2O2) (120 ml)
Potassium iodide (KI)
Copper(ll) chloride (CuCl2)
Sodium chloride (NaCl)
4 Timers
Procedure:
1. Take the catalyst, KI CuCl NaCl and place them on pieces of paper, label them 1-3.
2. Take 4 beakers and label them 1-4 place one drop of dish soap in each beaker.
3. In each beaker pour 30ml of hydrogen peroxide.
4. Take each catalyst and put them into their respective beakers.
5. As soon as the catalysts are dropped into the beakers start the timers to see which one has reacted the fastest.
6. Observe and record your results.
7. Put away your equipment.
Results of experiment, Data collected: test of effect of catalyst on reactions.
-KI- 2 min
-CuCl2- 4 min
-NaCl- 3 min
-Control 5 min
Discussion
My hypothesis was proven correct each reaction with a catalyst made the reaction faster than the control with no catalyst. I predicted that a catalyst would speed up the reactions and I was right. I have learn that catalyst provide the needed energy for reactions to occur that’s why they are faster then a reaction without a catalyst.
I made the experiment so that all variables would be accounted for. The timers were all started at the same time and the temperature was always the same. The presence of the catalyst was the independent variable and the rate of reaction the dependent variable. When the independent variable was changed it affected the dependent variable. I found no problems with the experiment and the results are valid.
When the first catalyst was added (KI) the result was that the reaction sped up significantly to the control. The control took 5 min to react while with the catalyst the reaction happened in 2 min. When the second catalyst was added (CuCl2) it was a weaker catalyst but it still speed up the reaction rate only taking 4 min to react. When the last catalyst was added it was in the middle it took around 3 minutes to react and was a pretty good catalyst. All catalyst proved that a catalyst sped up the rate of reaction.
The experiment was successful and overall done very well. If I could change something it would be the kind of catalyst used I would try to find very fast catalyst and try to make the reactions even faster. No problems were identified all variables were considers including the amount of reactants and catalyst added. If I were to repeat the project I would also test inhibitors and their affect on rate of reactions. All in all the experiment was definitive and awesome to try.
Conclusion
My results were proved my hypothesis correct. If the presence of a catalyst affects the rate of reaction then a catalyst will speed up the rate of reaction. All my data proved that having a catalyst speed up the rate of reaction. The first catalyst took 2 min to react, the second 4 min and the last 3 min all of them faster then the 5 min the control took with no catalyst. The experiment was successful and valid all variables accounted for. The experiment was great to be apart of and I hope to do it again!
Hypothesis: If the rate of reaction is related to the presence of a catalyst then, the presence of a catalyst will make the rate of reaction faster.
Independent Variable: Presence of a catalyst
Depend variable: Rate of reaction
Controlled Variables: Amount of catalyst added type of catalyst used
Materials:
4 beakers
3 pieces of paper
Dish Soap
6% hydrogen peroxide solution (H2O2) (120 ml)
Potassium iodide (KI)
Copper(ll) chloride (CuCl2)
Sodium chloride (NaCl)
4 Timers
Procedure:
1. Take the catalyst, KI CuCl NaCl and place them on pieces of paper, label them 1-3.
2. Take 4 beakers and label them 1-4 place one drop of dish soap in each beaker.
3. In each beaker pour 30ml of hydrogen peroxide.
4. Take each catalyst and put them into their respective beakers.
5. As soon as the catalysts are dropped into the beakers start the timers to see which one has reacted the fastest.
6. Observe and record your results.
7. Put away your equipment.
Results of experiment, Data collected: test of effect of catalyst on reactions.
-KI- 2 min
-CuCl2- 4 min
-NaCl- 3 min
-Control 5 min
Discussion
My hypothesis was proven correct each reaction with a catalyst made the reaction faster than the control with no catalyst. I predicted that a catalyst would speed up the reactions and I was right. I have learn that catalyst provide the needed energy for reactions to occur that’s why they are faster then a reaction without a catalyst.
I made the experiment so that all variables would be accounted for. The timers were all started at the same time and the temperature was always the same. The presence of the catalyst was the independent variable and the rate of reaction the dependent variable. When the independent variable was changed it affected the dependent variable. I found no problems with the experiment and the results are valid.
When the first catalyst was added (KI) the result was that the reaction sped up significantly to the control. The control took 5 min to react while with the catalyst the reaction happened in 2 min. When the second catalyst was added (CuCl2) it was a weaker catalyst but it still speed up the reaction rate only taking 4 min to react. When the last catalyst was added it was in the middle it took around 3 minutes to react and was a pretty good catalyst. All catalyst proved that a catalyst sped up the rate of reaction.
The experiment was successful and overall done very well. If I could change something it would be the kind of catalyst used I would try to find very fast catalyst and try to make the reactions even faster. No problems were identified all variables were considers including the amount of reactants and catalyst added. If I were to repeat the project I would also test inhibitors and their affect on rate of reactions. All in all the experiment was definitive and awesome to try.
Conclusion
My results were proved my hypothesis correct. If the presence of a catalyst affects the rate of reaction then a catalyst will speed up the rate of reaction. All my data proved that having a catalyst speed up the rate of reaction. The first catalyst took 2 min to react, the second 4 min and the last 3 min all of them faster then the 5 min the control took with no catalyst. The experiment was successful and valid all variables accounted for. The experiment was great to be apart of and I hope to do it again!