The Purpose of this experiment is to test temperatures and how they affect reactions and reaction times.
Hypothesis:
If temperature change is related to the performance of dissolving the tablet in cold water will decrease the time of dissolving.
Materials:
- Three Beakers
- Room temperature water (22 Degrees)
- Ice water(Cold water 10 Degrees)
- Hot water (Boiling water 90 Degrees)
- Thermometer
- Three halves of Alka Seltzer Tablets
- Stopwatch
- Prepare your hot water and bring it to a boil. Record the temperature of the hot water and make sure it is at 90 degrees.
- Fill the beaker with 100ml of hot water
- Place half of the Alka Seltzer Tablet into the hot water.
- Record the time from when it was placed in to when it's dissolved
- Prepare a beaker filled with 100ml of room temperature water. (22 degrees)
- Place half of the Alka Seltzer Tablet into the beaker.
- Record the time from when the tablet was placed into the water to when it is completely dissolved.
- Prepare a beaker filled with cold water(100ml) with the temperature of 10 degrees.
- Place half of the Alka Seltzer Tablet into the cold water.
- Record the time from when it is placed in to when it is dissolved.
Observations:
Discussion:
During this experiment we tested how the different levels of concentrations can affect the speed and times of reactions. We proved our hypothesis correct because the cold water slowed down the rate of which the tablet reacts with the water. It took the tablet 1:40.8 seconds to react with the cold water which proves our hypothesis correct. The tablet reacted the quickest with the hot water with the time of 15.5 seconds. We made sure that everything was the same and the temperatures were correct the only flaw was the tablets. Since the tablets had to be split in half the sizes could have been uneven even if they looked symmetrical. If the tablets had a difference in sizes it could have affected the reaction times majorly. If I could have done this differently I would made sure that the tablets were exactly the same throughout the experiment.
Conclusion:
Our results proved our hypothesis correct when the cold water took the longest out of all the tests to react with the tablet. The approximate half of an Alka Seltzer tablet took 1:40.8 seconds to dissolve completely in cold water. The fastest out of all the tests was the hot water at 90 degrees it took the tablet 15.5 seconds to dissolve. With the time of 51.4 seconds the room temperature comes in in the mid way mark between the cold and hot water.
Observations and Results of the Reaction Rate
Temperatures of Water Time Observations
Hot Water - 90 Degrees 0:15.5 Seconds White bubbles form quickly
Room Water - 22 Degrees 0:51.4 Seconds White bubbles form relatively quick
Cold Water - 10 Degrees 1:40.8 Seconds White bubbles form slowly and continue
to form though out the time it took to
dissolve
Discussion:
During this experiment we tested how the different levels of concentrations can affect the speed and times of reactions. We proved our hypothesis correct because the cold water slowed down the rate of which the tablet reacts with the water. It took the tablet 1:40.8 seconds to react with the cold water which proves our hypothesis correct. The tablet reacted the quickest with the hot water with the time of 15.5 seconds. We made sure that everything was the same and the temperatures were correct the only flaw was the tablets. Since the tablets had to be split in half the sizes could have been uneven even if they looked symmetrical. If the tablets had a difference in sizes it could have affected the reaction times majorly. If I could have done this differently I would made sure that the tablets were exactly the same throughout the experiment.
Conclusion:
Our results proved our hypothesis correct when the cold water took the longest out of all the tests to react with the tablet. The approximate half of an Alka Seltzer tablet took 1:40.8 seconds to dissolve completely in cold water. The fastest out of all the tests was the hot water at 90 degrees it took the tablet 15.5 seconds to dissolve. With the time of 51.4 seconds the room temperature comes in in the mid way mark between the cold and hot water.
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