Module 2: Biochemistry Topic 1 Application: Properties of Water Scientific Investigation Report Title: Properties of Water Scientific Investigation Hypothesis Using the Procedure and Data Collection...

Module 2: Biochemistry Topic 1 Application: Properties of Water Scientific Investigation Report Title: Properties of Water Scientific Investigation Hypothesis Using the Procedure and Data Collection section below, read through the procedural information for each section of this scientific investigation. Based on your understanding of the procedure, develop your own hypotheses which describe your expected results. Record these hypotheses in the Hypothesis section of your Properties of Water Scientific Investigation Report. Record these hypotheses below: Procedure In this lab you will use a webpage that will allow you to measure the density of water as a function if temperature (T). It is exploits the fact that mass is essentially independent of temperature. For a known mass of water we only need to measure its volume to know its density. You will notice that the apparatus does not a low us to drop the temperature below 0.00cC, the temperature at which water freezes. Liquid water can exist at temperatures below OCC. This is known as supercooled water. Supercooled liquid water is not stable, however. A loud noise or a thump can induce freezing. When water goes from a liquid to a solid, its densty changes rapidly and dramatically -- it decreases from - o.gggg g/ml to — 0.93 g/ml. You will now investigate the relationship between the density of water, and temperature. Click HERE to view the virtual Lab. You will be taken to a page that has an image similar to the one below. Click Proceed. Your goal is determine the temperature at which water has its highest density, to within 0.5C. You will need to take at least five data points. It is also likely that you will want to take a reading at a temperature close to your estimate for the temperature of maximum density, just to be sure you are right. To adjust the temperature please see the image below. Data Part I Data Table Temperature Column Height 20 Data Analysis Provide responses to the following questions: Part I 1. Why can changes in volume be used to estimate changes in density? 2. Where might errors creep into your observations? 3. Why don't all liquids display a temperature versus density relationship similar to that of water? 4. If a single molecule does not have a temperature, what does temperature measure? 5. Why is ice less dense than water? 6. What would happen to our apparatus if the water in it froze Conclusion Compose three to four sentences describing an overall conclusion based on your data. Were your hypotheses true or false, and how do you know? Use the data and notes that you collected from your investigation to form your conclusion. Make sure that you include information that you gained from data analysis to support your conclusion. Experimental Sources of Error Provide responses to the following questions: Are there any sources of error? If so, what are they, and what could be done to minimize error? Once you have completed the Properties of Water Scientific Investigation Report, please submit your work to the dropbox. 3