Virtual Lab: Determination of the Sucrose Content in a Cola Sample. Purpose: In this virtual lab activity, you will prepare a series of sucrose (sugar) solutions and measure their densities. You will...

Chemistry online lab


Virtual Lab: Determination of the Sucrose Content in a Cola Sample. Purpose: In this virtual lab activity, you will prepare a series of sucrose (sugar) solutions and measure their densities. You will then use this information to determine the sucrose concentration in a sample of cola. This activity will show you that the physical properties of a solution are related to the concentration of the solution. · To complete this activity, you will need to go to the Virtual Lab at: http://chemcollective.org/activities/vlab/66 · You will also be using Excel to make a graph and fit a linear trendline. You will then use the trendline equation to find an unknown. If you haven’t done this before, the video linked below will be useful. https://www.youtube.com/watch?v=d65jx4BhslA As you work through the assignment below, type your answers to the questions directly on this document. When you are finished, save the document and upload it to D2L. Go to Assessments Assignments and then click on the Determination of Sucrose Content in a Cola Sample folder. Click Add a File to upload your assignment. 1) Using the Virtual Lab, prepare the sucrose solutions in the table below and measure the density of each solution. How you prepare the solutions and measure the density is up to you. However, make note of how you did it because you will need to describe it below. NOTE: These concentrations are different than what is in the video. Use the concentrations in the table below, not what’s in the video. Record all data to 5 significant figures. Sucrose Concentration (M) Density (g/mL) 0.2 < insert="" answer="" here=""> 0.4< insert="" answer="" here=""> 0.6< insert="" answer="" here=""> 0.8< insert="" answer="" here=""> 1.0< insert="" answer="" here=""> 2) Describe how you made these solutions. Be specific and include the glassware used, amounts, etc. I should be able to exactly repeat your experiment based on this description. < insert="" answer="" here=""> 3) Describe how you measured the density. Again, be specific. < insert="" answer="" here=""> 4) Measure the density of the Cola sample in the Virtual Lab. Report the density below along with a description of how you measured it below. < insert="" answer="" here=""> 5) Use Excel to make a graph of Sucrose Concentration vs. Density. Copy the table from #1 above and then open Excel and paste the table into an Excel spreadsheet, or just type it in. Instructions for making the graph with Excel are in the link above. Make sure to add a linear trendline and display the trendline equation. Also, your graph needs a title and axis labels with units. Once you have finished the graph, copy and paste it below. Right click on the graph in Excel and the click Edit Copy. Then, click on the line below and then Edit Paste. Your graph should appear below.< insert="" graph="" here=""> 6) Using the trendline equation from #5 and the density of the Cola sample found in #4 above, find the concentration of the Cola sample. (Cola is mainly sugar and water so we will assume its density behaves like sucrose solutions). Report your answer below and show your work. Don’t forget units! < insert="" answer="" here=""> 7) How many grams of sucrose are in 20 oz. of the Cola sample? Show your work. (Hint: You need to use your answer from #6 for this.) < insert="" answer="" here=""> 8) What is the density of a 0.750 M sucrose solution? Show your work. < insert="" answer="" here=""> When you are finished, save the document and upload it to D2L. Go to Assessments Assignments and then click on the Determination of Sucrose Content in a Cola Sample folder. Click Add a File to upload your assignment.