Lab Notebook: Diffusion & Osmosis 1) Title & Date 2) Pre-Lab (Key Concepts, Equations, Materials List) 3) Purposes (2-3) 4) Personal Account – Part I:

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Presentation transcript:

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 Pipets Beakers Scales Paper Towels Clock

1.Hypothesis – “If…then…” 2.Independent & dependent variables - IV: sucrose sol’ns DV: % change in mass 3.Control group: Experimental group: 4.Constants: -same temp – -same volume – -equipment – -Time – 5.Random sampling – N/A 6.Large sample size – 7.Repeated – 8.Graph When massing bag, blot off outside. Only inside contents matter. Yes, you may use your one phone per pair as a timer. Good Experimental Design H2OH2OA - E Room Temperature 10 mL in bag…..’excess’ of H 2 O in cup scales, pipets, etc. 15 min classes all day % change = F-I x 100 I

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

ST PERIOD Diffusion & Osmosis Lab Data ABCDEControl % change12.61%8.49%5.76%20.5%20%0% % change12.15%8.57%3.7%17.6%14.54%0% % change12.8%7.87%4.81%17.39%18.3% Average % change 12.5%8.3%4.8%18.5%17.6%0%

2015– 2 nd PERIOD Diffusion & Osmosis Lab Data ABCDEControl % change10.19%9.43%4.9%14%11.11%0% % change10.19%6.60%3.8%14.9%10.71%.96% % change8.65%8.49%2.88%16.66%13.3% Average % change 9.7%8.2%3.9%15.2%11.7%0.48%

2015– 3 rd PERIOD Diffusion & Osmosis Lab Data ABCDEControl % change9.26%6.542%5.71%12.5%11.82%.95% % change7.27%5.6%3.8%7.0%9.65%0% % change%%% Average % change 8.3%6.1%4.8%9.8%10.7%0.48%

2015– 4 th PERIOD Diffusion & Osmosis Lab Data ABCDEControl % change9.09%7.55%3.77%14.16%11.13% % change9.35%6.54%3.64%13.39%16.346%-0.952% % change%%% Average % change 9.22%7.05%3.71%13.78%13.74%-0.48%

2015– 6 th PERIOD Diffusion & Osmosis Lab Data ABCDEControl % change11.9%7.3%5.77%15.7%10.00%3.81% % change8.41%7.62%7.69%20.33%12.38%0% % change19.61%7.5%%% Average % change 13.3%7.47%6.73%18.02%11.19%1.90%