Describe the net movement of water in osmometer 1. Describe the net movement of the water in osmometer 2.The direction of the osmosis travelled down due to the lower concentration of the water in the beaker.How is the movement of water molecules related to the concentration gradient of thesolution? EXERCISE 3 – Effect of solute concentration on rate of osmosisSteps 12-17: Record the masses in the table below. Thensubtract the initial mass from the mass of each of the five bags at 20 minutes and 40 minutes to determine mass change. Record below. 3
© Copyright 2015 Access Learning Systems Step 18:Double click the chart below to open a spreadsheet and enter the results from the table above to complete the graph. If the spreadsheet does not open, click on the “sheet1” tabat the bottom of the chart after you double click, then enter the data and click back to the Chart1 tab. When you are finished with your work, click into another area in the lab report to close the spreadsheet.Answer the questions below based on data displayed in the previous graph.Was the direction of net movement of water in bags 1 to 4 into or out of the bags? Which bag gained the most mass? Why? 4 Bag Bag contents/ beaker contents Initial Mass 0 Min Mass at 20 Min Mass at 40 Min Mass Change 0 Min Mass Change 20 Min Mass Change 40 Min 1 Distilled water/ distilled water 10 10 10 0 0 0 2 10% sucrose/ distilled water 10.6 11.6 12 0 1 1.4 3 20% sucrose/ distilled water 10.8 12.5 13.3 0 1.7 2.5 4 40% sucrose/ distilled water 11 13.1 14.6 0 2.1 3.6 5 Distilled water/ 40% sucrose 10 17.9 16.2 0 7.9 6.2
© Copyright 2015 Access Learning Systems
You've reached the end of your free preview.
Want to read all 9 pages?
- Winter '14
- Osmosis, Access Learning Systems