Lab Notebook: Diffusion & Osmosis 1) Title & Date 2) Pre-Lab (Key Concepts, Equations, Materials List) 3) Purposes (2-3) 4) Personal Account Part I: Procedure, data table Part II: Hypothesis, procedure, I.V. & D.V., ID control vs. experimental groups, data table, line graph, calculations/equations 5) Discussion (answers to ALL ?s for BOTH parts of lab) 6) Conclusion

Potential materials… Unknown solutions (A-E) Distilled water Dialysis Tubing 10 mL Pipets Beakers (Cups) Scales Paper Towels Clock

Good Experimental Design Hypothesis – “If…then…” Independent & dependent variables - IV: sucrose sol’ns DV: % change in mass Control group: Experimental group: Constants: same temp – same volume – equipment – Time – Random sampling – N/A Large sample size – Repeated – Graph When massing bag, blot off outside. Only inside contents matter. Yes, you may use your one phone per pair as a timer. H2O A - E Room Temperature 10 mL in bag…..’excess’ of H2O in cup scales, pipets, etc. 20 min % change = F-I x 100 I classes all day classes all day

Be sure to find the slide that aligns with your class period!!!

2016– 2nd PERIOD Diffusion & Osmosis Lab Data C D E Control % change 14.29% 5.6% 23.4% 9.26% 19.5% 1.92% 16.35% 6.8% 18.42% 9.87% 20.35% -2.75% 15.7% 9.01% 24.3% Average % change 15.4% 7.1% 22.0% 9.6% 19.9% -0.4%

2016– 3rd PERIOD Diffusion & Osmosis Lab Data C D E Control % change 17.12% 5.8% 19.54% 10.38% 16.50% 0.97% 10.19% 9.5% 22.54% 4.67% 17.10% 0% 12.7% 9.61% 22.81% 12.9% Average % change 13.3% 8.3% 21.6% 9.3% 16.8% 0.5%

2016– 4th PERIOD Diffusion & Osmosis Lab Data C D E Control % change 12.8% 5.8% 19.1% 13.2% 20.5% 0% 11.7% 7.6% 18.7% 8.4% 15.0% 4.8% 23.9% Average % change 6.1% 20.6% 11.6% 19.8%

2016– 6th PERIOD Diffusion & Osmosis Lab Data C D E Control % change 14.6% 8.4% 20.3% 10.9% 19.8% 3.8% 11.2% 5.66% 18.8% 9.3% 18% 0% 16.8% 5.6% 22.6% 15.5% 20% 1.9% Average % change 14.2% 6.6% 20.6% 11.9% 19.3%

2016– 8th PERIOD Diffusion & Osmosis Lab Data C D E Control % change 14.3% 7.7% 15.6% 10.28% 17.91% 3.88% 16.4% 6.8% 21.4% 7.21% 11.7% 0% 18% 8% 23% Average % change 16.2% 7.5% 20.0% 8.7% 14.8% 1.94%

2016– ALL PERIODS COMBINED Diffusion & Osmosis Lab Data Control % change 14.3% 7.7% 15.6% 10.28% 17.91% 3.88% 16.4% 6.8% 21.4% 7.21% 11.7% 0% 18% 8% 23% 14.6% 8.4% 20.3% 10.9% 19.8% 3.8% 11.2% 5.66% 18.8% 9.3% 16.8% 5.6% 22.6% 15.5% 20% 1.9% 12.8% 5.8% 19.1% 13.2% 20.5% 7.6% 18.7% 15.0% 4.8% 23.9% 17.12% 19.54% 10.38% 16.50% 0.97% 10.19% 9.5% 22.54% 4.67% 17.10% 12.7% 9.61% 22.81% 12.9% 14.29% 23.4% 9.26% 19.5% 1.92% 16.35% 18.42% 9.87% 20.35% -2.75% 15.7% 9.01% 24.3% Avg % change 14.5% 7.1% 21.0% 10.4% 18.2% 0.9%