Exploring the Effect of Temperature on Alka-Seltzer Dissolution
School
Coastal Carolina University**We aren't endorsed by this school
Course
BIOLOGY 151
Subject
Mathematics
Date
Dec 12, 2024
Pages
5
Uploaded by AdmiralHeat15768
Post-Lab 2 AssignmentA Scientific Method InvestigationStudent Name - 1. State your hypothesis from activity 1 of this lab. (2 points)If water temperature increases, then the time for the Alka-Seltzer tablet to dissolve will decrease.2. Enter the data from Data Table 1 on page 8 of lab 2 manual. (8 points)Run No. Cup Temp. (̊C) Time (sec.) Observations 1C -10202Slow fizzingRT 059Moderate fizzingH 3041Rapid fizzing2C -10154Similar for allRT 167H 38263C -10172RT 250H 3533Avg.C -10176RT 157H 3433
2. Using graphing software such as Excel, graph only the average data of Activity 1. Please see the Introduction to Graphing manual for guidance. In addition, Watch the video “Temperature vs. Time – Excel” and review the document “Excel Trendline and Equation Instruction” posted in this module to construct and organize your graph. Finally, copy and paste the excel graph in the space below. (5 points)Your graph MUST include the following:A descriptive graph title.Both axes labeled appropriately with units.Average data plotted on the graph.Trendline and the equation of the line in the form of y = mx + b.3. Revisit the hypothesis that you have constructed for this activity in your Pre-Lab 2 Assignment. Does your data support or refute your hypothesis? Explain. (2 points)Yes, the data supports the hypothesis. The time to dissolve decreased consistently as the water temperature increased.4. Predict how many seconds it will take to dissolve an Alka-Seltzer®tablet in 200 mL of water at the following temperatures. Use the trend line and the equation to find the
same and show your work for each calculation. If needed, please refer to the Introduction to Graphing manual for guidance. (5 points)a.35°Cy=−2.6678(35) + 110.9= -93.373 +110.9 =17.53 secondsb.60°CY=-2.6678(60) + 110.9 =-160.068 +110.9 = -49.17 seconds (unrealistic) c.80°Cy=−2.6678(80)+110.9 =−213.424+110.9 =−102.52seconds (not feasible)5. Enter the data from Activity 2 Table on page 9 of lab 2 manual. Note that you need to manipulate a variable other than temperature for activity 2. Manipulating the temperature will generate a very similar, if not identical experiment, which is not acceptable. In addition, make sure to manipulate only one variable and not multiple ones. (6 points)Identify the independent variable.stirring intensity (e.g., no stirring vs. continuous stirring).Identify the dependent variable.Time to dissolve (seconds).List the controlled variables.Water temperature, volume (200 mL), tablet size6. State a hypothesis for Activity 2. Remember to create a statement that is able to be tested empirically. (2 points)If water is stirred continuously, then the Alka-Seltzer tablet will dissolve faster than in still water.5. Enter the data from Data Table 2 on page 10 of lab 2 manual. (8 points)
Run No. Manipulated Variable Time (sec.)Observations1Stirred 45Vigorous bubblingunstirred65Moderate fizzing2stirred47Rapid mixing observedunstirred65Fizzing slowed at end3stirred43unstirred58Avg.stirred45unstirred616. Using graphing software such as Excel, graph only the average data of Activity 2. Please see the Introduction to Graphing manual for guidance. In addition, Watch the video “Temperature vs. Time – Excel” and review the document “Excel Trendline and Equation Instruction” posted in this module to construct and organize your graph. Finally, copy and paste the excel graph in the space below. (5 points)Your graph MUST include the following:A descriptive graph title.Both axes labeled appropriately with units.Average data plotted on the graph.Trendline and the equation of the line in the form of y = mx + b.
3. Revisit the hypothesis that you have constructed for this activity in your answer 6. Does your data support or refute your hypothesis? Explain. (2 points)The data shows that stirring reduces the time to dissolve the Alka-Seltzer tablet