6.04 Lab Report: Reaction Rates and Temperature—Assignment Template To use this template, go to File, select Download As. Then select the file type you can edit. Once you are done please save this file and attach to your assessment. Name: In this activity you will complete a virtual experiment to determine how the temperature of water affect the time it takes for antacid tablets to dissolve. Read over the lab report before you begin. If you choose to conduct this experiment by setting it up at home, then please review the lab safety guide in the Course Information section before you begin. Keep in mind you may use the video in the lesson to record the reaction times. Pre-lab Questions: (10 points) 1. How does an increase in concentration affect a chemical reaction? With an increase of concentration, the number of molecules will increase, therefore making the reaction much faster. 2. When temperature increases, what happens to the molecules in a chemical reaction? When the temperature is increased, it also increases the average speed of the molecules in the reaction. 3. How do we measure the average kinetic motion of molecules in a solution? We can measure the average kinetic motion of molecules by how much heat is in the solution. Hypothesis: (4 points) Before you begin your lab, write a hypothesis that reflects how you think temperature of the water will affect the reaction rates. Record your hypothesis as an “if, then” statement. If the temperature increases, then the length of time it takes for the antacid tablets to dissolve increases. Variables: (6 points) This experiment tests how the temperature of water affects the time it takes for antacid tablets to dissolve. What is the independent variable? the antacid tablets What is the dependent variable? the different temperature waters. Materials Note that you may choose to conduct this lab with the materials listed below (follow all lab safety procedures) or by watching the experiment video in the lesson. ● 4 antacid tablets ● 2 clear cups labeled Hot and Cold ● Water ● Timing device Procedure 1. Observe the experiment in the virtual lab window. (Or, if you choose to perform this experiment yourself, follow the same procedures shown in the video.) 2. Record the time for each trial of the experiment. Data: (5 points) Data table: Record the length of time for each trial. Trial 1 2 Time for tablet to dissolve in hot water fifty five seconds twenty seven seconds Time for tablet to dissolve in cold water one minute and two seconds thirty two seconds Graph: (5 points) Create and include a graph to show the results from the trials. You may use the Create a Graph tool located in the course toolkit for help creating a graph. Post-Lab Questions (10 points) 1. Review your data. Did your experiment support your hypothesis? Support your answer with data from your experiment. Yes, my experiment goes along with my hypothesis. Because, according to my research, the higher the temperature of the water is, the faster it takes for the tablets to dissolve. 2. How did the temperature affect the time it took for the antacid tablet to dissolve? The higher the temperature of the water is, the faster it takes for it to dissolve. For example, in trial 1 the tablets dissolved in 55 seconds in hot water, in contrast to when the tablets were in the cold water. 3. What evidence indicates that a chemical reaction took place? The evidence that indicates that a chemical reaction took place was when the tablets dissolved in the water. 4. Predict what would happen if the same experiment was conducted with different amounts of water. I predict that the results would still be the same and that the hot water will continue to be faster to dissolve the tablets rather than the cold water.
