1. 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

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

3. 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

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

5. 2016– 2nd PERIOD Diffusion & Osmosis Lab DataC 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%

6. 2016– 3rd PERIOD Diffusion & Osmosis Lab DataC 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%

7. 2016– 4th PERIOD Diffusion & Osmosis Lab DataC 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%

8. 2016– 6th PERIOD Diffusion & Osmosis Lab DataC 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%

9. 2016– 8th PERIOD Diffusion & Osmosis Lab DataC 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%

10. 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%