1. 1. PORTFOLIO Experimental Design Lab Report Example
2. 2. TITLE The Mass of H2O in 2 States of Matter (liquid & solid)
3. 3. BACKGROUND If a person compares the same amount of ice and water, ice does not have more mass than liquid water. They do have different densities though because liquid water has more volume than ice. The density if water is 1g/cubic cm The density of Ice is .92g/cubic cm Source: Helmenstine
4. 4. PROBLEM QUESTION Does H2O have the same mass in liquid and solid form?
5. 5. REAL-WORLD CONNECTION You need to carry a large amount of water and want to know if you should take it frozen or in liquid form so that it weighs less to carry.
6. 6. MATERIALS DIGITAL SCALE BEAKER HOT WATER ICE
7. 7. LAB SET-UP beaker Ice or water digital scale
8. 8. VARIABLES Dependent Variable The state of matter (solid/liquid) (changed) Independent Variable Mass (measured) Constants scale
9. 9. PROCEDURE SUMMARY I wanted to see if the mass of a liquid (water) and a solid (ice) were the same. I weighed (mass) an ice cube and then melted the same ice cube and weighed (mass) it again.
10. 10. HYPOTHESIS What do you think will happen? What is your hypothesis?
11. 11. HYPOTHESIS If I measure the mass of water as a solid (ice) and as a liquid their masses will be equal because they are the same substance H2O.
12. 12. PROCEDURE STEP 1: Weighed the ice in grams inside a 80mL beaker on a digital scale
13. 13. PROCEDURE STEP 2: Poured 100mL of hot water from a hot pot into a 500mL beaker
14. 14. PROCEDURE STEP 3: Put ice into a 80mL beaker and placed into 500mL beaker with hot water
15. 15. PROCEDURE STEP 4: Waited for the ice to melt in the beaker
16. 16. PROCEDURE STEP 5: Take melted ice out of 500mL beaker
17. 17. PROCEDURE STEP 6: Weighed the melted ice (liquid) on the digital scale in grams (g)
18. 18. DEMONSTRATION I will now demonstrate a portion of the lab. ( ONLY if you have a demonstration)
19. 19. DATA MASS OF H2O in 2 States of Matter Trial 1 Trial 2 Trial 3 Mass (grams) Solid (ice) 60 62 50 Liquid (water) 64 62 50 Difference 4 0 0 Average Difference 1.3
20. 20. GRAPH 0 10 20 30 40 50 60 70 1 2 3 60 62 50 64 62 50 Mass(grams) Trials Mass of H2O in 2 States of Matter Solid (ice) Liquid (water)
21. 21. ANALYSIS & RESULTS The data showed that 2 out 3 times, the mass of liquid and solid were the same. Dependent Variable The state of matter (solid/liquid) Independent Variable Mass So the state of matter (dependent variable) does not change the mass (independent variable). Relationship to Background Research: According to my background research on the mass of solid and liquid H2O, they should have been the same. I found this was the case 2 out of 3 trials. This leads me to believe that I had a source of error in trial 1.
22. 22. SOURCES OF ERROR ERROR #1 I may have forgotten to wipe off the excess water when I removed it from the hot water. EFFECT This may have added mass to the liquid ERROR #2 When I put the beaker with ice into the hot water it tipped over, some water may have gotten in EFFECT This may have added mass to the liquid
23. 23. POSSIBLE REVISIONS REVISION #1 I would try and use the same size ice cube EFFECT This will keep the masses more similar REVISION #2 More trials EFFECT There would be more data to compare
24. 24. CONCLUSIONS If I measure the mass of water as a solid (ice) and as a liquid their masses will be equal because they are the same substance H2O. I found that in most cases they are the same. Supporting Evidence: Trial 2 Solid = 62g and Liquid = 62g Trial 3 Solid = 50g and Liquid = 50g
25. 25. CONCLUSIONS continued Hypothesis: If I measure the mass of water as a solid (ice) and as a liquid their masses will be equal because they are the same substance H2O. Supported: My hypothesis was supported according trials 2 and 3 but not in trial 1. Trial 2 Trial 3 Solid = 62g /Liquid = 62g Solid = 50g / Liquid = 50g Trial 1 (Not supported) Solid = 60g and Liquid = 64g (4 grams different liquid had a higher mass)
26. 26. CONCLUSIONS continued NOW CAN YOU ANSWER THE PROBLEM QUESTION? Problem Question: Does H2O have the same mass in liquid and solid form?
27. 27. CONCLUSIONS continued Answer: Yes, it looks like the mass of H2O in liquid and solid form is nearly the same.
28. 28. FURTHER RESEARCH QUESTION #1 Do liquid and solid (ice) H2O have the same volume? QUESTION #2 Do liquid and solid (ice) H2O have the same density? QUESTION #3 Would there be the same results with another type of liquid, juice for example?
29. 29. SOURCES "Density of Ice." Density of Ice. N.p., n.d. Web. 06 May 2015. . "If Ice Is Just Water in Its Solid State Why Does It Float? /r/askscience." Reddit. N.p., n.d. Web. 06 May 2015. . Helmenstine, Ph.D. Anne Marie. "Why Is Water More Dense Than Ice?" N.p., n.d. Web. 06 May 2015. . "Stock Photos & Video Footage." Stock Photos, Royalty Free Images & Video Footage By Dreamstime Stock Photography. N.p., n.d. Web. 06 May 2015. .