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I think that the Alka-seltzer tablet will dissolve faster in the hot water than the cold or ice water.
1. First, in the Lab notebook, make a data table to record the results of the experiment.
2. Prepare a drinking glass so that it is marked at the 250mL point. You will use the same glass for multiple trials, so it is convenient to mark the desired water level.
3. You will fill the drinking glass with the same volume of water at three different temperatures: hot tap water, cold tap water, and ice water.
The results of the hot tap water experiment
Trial 1 :
pre water temperature = 64C
dissolve time= 17.80 seconds
Trial 2:
pre water temperature= 65C
dissolve time= 16.06 seconds
Trial 3:
pre water temperature= 65C
dissolve time= 14.29 seconds
Trial 4:
pre water temperature= 65C
dissolve time= 13.72 seconds
average time= 15.4675
What effect does heat have on a chemical reaction? (Alka seltzer tablets)
1. Alka-Seltzer tablets: 1 tablet for each type of water (hot, cold, and ice). Each type of water gets 4 trials. 12 tablets in total.
2. Thermometer with a range of at least 0 to 60 degrees C
3. Clear drinking glass or jar ( 12 ounce [ 355 mL] or larger)
4. Graduated cylinder, 100 mL
5. Masking tape
6. Something to stir with, a spoon or a chopstick.
7. Hot and cold tap water,12 ounces (for each trial)
8. 4 Ice cubes (per trial for ice water)
9. Stopwatch or a clock or watch with a second hand.
10. A helper
11. Lab notebook
12. Pencil
In conclusion, the hot water had the fastest dissolve time out of the three types of water. The ice water took the longest dissolve time out of the three. My hypothesis was correct, heat did have the fastest dissolve time.
One thing I could of done differently was to have separate 12 ounce glasses for the three different types of water. This would benefit the experiment because the temperatures will stay the same in the different glasses. This also means that I would have consistent answers during each trial.
The results of the cold tap water experiment
Trial 1 :
pre water temperature = 10C
dissolve time= 1.04.20 seconds
Trial 2:
pre water temperature= 12C
dissolve time= 1.14.37 seconds
Trial 3:
pre water temperature= 12C
dissolve time= 1.13.39 seconds
Trial 4:
pre water temperature= 12C
dissolve time= 1.16.29 seconds
average time= 1.120625
The results of the ice water experiment
Trial 1 :
pre water temperature = 2C
dissolve time= 3.04.94 seconds
Trial 2:
pre water temperature= 1C
dissolve time= 3.12.14 seconds
Trial 3:
pre water temperature= 1C
dissolve time= 3.14.82 seconds
Trial 4:
pre water temperature= 2C
dissolve time= 3.01.98 seconds
average time= 3.0847
4. Prepare the drinking glass with one of the three temperatures as described in step 3. Then measure the reaction time for that temperature.
5. Repeat step 4 three more times with the same temperature.
6. Repeat steps 4 to 5 for each of the other temperatures.
7. Calculate the average reaction time for each of the temperatures.
8. Make a graph of the average reaction time, in seconds (on the y- axis ), v.s. water temperature, in degrees Celsuis (on the x-axis).