Step 2: Perform the Temperature Experiment

Question

Follow the step-by-step procedure to conduct your experiment. Record and describe your data. You will use this data for Part 2. Step-by-Step Procedure
Here is the step-by-step procedure.

Label one cup Hot Water, the second cup Ice Water, and the third cup Room Temperature Water.
Turn on a faucet and run the tap water until it is very hot. Fill the first cup about full of hot water.
Use the thermometer to take the temperature of the water. Record your data.
Drop one antacid tablet in the water. Measure the time it takes for the tablet to completely dissolve and stop fizzing. Record the time.
Fill the second cup about full of room temperature water. Add the ice cube(s) to bring up the water level so the cup is about full. Wait about 15 seconds for the temperature in the cup to come to equilibrium. The water should be cold.
Repeat Steps 3 and 4. Record your data.
Fill the third cup about full of room temperature water.
Repeat Steps 3 and 4. Record your data.

Record Data and Notes
Record your data from the procedure. You can record your data with any method you choose, but a table is provided as a starting point. If you use another data collection method, remove the table and insert it here. If you noticed anything during your investigation you want to document, use this space to jot down any notes or additional observations. (If needed, add more rows or columns to the table.)

Data
Hot Water
Cold Water
Room Temperature Water
Temperature
85°C
5°C
22°C
Time to Dissolve
45 seconds
120 seconds
60 seconds 
Notes/ Observations
Using the thermometer, I measured the temperature of the hot water; it was 85°C.After dropping an antacid tablet in the hot water, it took 45 seconds for the tablet to completely dissolve and for the fizzing to stop.
After adding ice cubes to the room temperature water and waiting 15 seconds, the temperature of the water dropped to 5°C.The antacid tablet was dropped into the ice water, which took 120 seconds to dissolve completely and stop fizzing.
The room temperature water was measured at 22°C.Upon adding the antacid tablet, it took 60 seconds for the tablet to fully dissolve and stop fizzing.

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Part 2: Analyze the Temperature Experiment
Graph the data you collected in Part 1 and analyze it to understand the effect of temperature on reaction rate. Once your graph is complete, answer the questions that follow.
Step 1: Graph Your Data
Create a line or bar graph of temperature versus reaction time using the data from all three cups. Make sure your data is accurately represented. Note: Insert your data here.

Answer 1

Data Table

| Water Temperature | Temperature (°C) | Time to Dissolve (seconds) | |-----------------------|-----------------------|---------------------------------| | Hot Water | 85 | 45 | | Ice Water | 5 | 120 | | Room Temperature Water | 22 | 60 |

Notes/Observations

• The temperature of the hot water was recorded at 85°C. After dropping an antacid tablet into the hot water, it took 45 seconds for the tablet to completely dissolve and for the fizzing to stop.
• After placing ice cubes in the room temperature water and allowing it to reach equilibrium, the temperature of the water was measured at 5°C. The antacid tablet dropped into this icy water took 120 seconds to dissolve completely and stop fizzing.
• The temperature of the room temperature water was measured at 22°C. Upon adding the antacid tablet, it took 60 seconds for the tablet to fully dissolve and stop fizzing.

Step 2: Graph Your Data

To effectively analyze the data, we will create a bar graph with the water temperature on the x-axis and the time taken for the antacid tablet to dissolve on the y-axis.

Graph:

| Water Temperature (°C) | Time to Dissolve (seconds) | |-------------------------|-----------------------------| | 85 | 45 | | 5 | 120 | | 22 | 60 |

          
120 |                   |
    |                   |                  *    Ice Water (5°C)
100 |                   |
    |                   |
80  |                   |
    |           *       |    Room Temperature Water (22°C)
60  |                   |                  
    |                   |
40  |*                  |    Hot Water (85°C)
    |___________________|__________________________
       0      20     40     60     80    100
                     Temperature (°C)

Note: The above text representation of a graph is just illustrative. Create an actual bar graph using graphing software or tools (like Excel, Google Sheets, etc.) for a clearer visual representation.

Questions for Analysis

1. What trend did you observe regarding the temperature of the water and the time it took for the antacid tablet to dissolve?

   • The data shows an inverse relationship between temperature and time to dissolve. As the water temperature increased, the time it took for the antacid tablet to dissolve decreased.

2. What could explain the relationship between temperature and reaction rate?

   • Higher temperatures typically increase the kinetic energy of molecules, which can lead to more frequent and effective collisions between the water molecules and the antacid tablet. This is likely why the tablet dissolved more quickly in hot water compared to ice water.

3. How do these results relate to the concept of reaction rates in chemistry?

   • These results support the general principle that temperature affects the rate of chemical reactions. As temperature increases, the rate of reaction typically increases, thereby speeding up processes such as dissolution or chemical reactions.

4. Which temperature provided the fastest reaction rate?

   • The hot water at 85°C resulted in the fastest reaction rate, with the antacid tablet dissolving in just 45 seconds.

5. What further experiments could you conduct based on these results?

   • Further experiments could include testing additional temperatures within a more defined range, using different brands or types of antacid tablets, or changing other conditions like pressure and concentration to observe their effect on reaction rates.