question archive Module 1 Lab Report – CHEM 1808 Colligative Properties Follow the directions in the lab write up
Module 1 Lab Report – CHEM 1808 Colligative Properties Follow the directions in the lab write up
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Module 1 Lab Report – CHEM 1808
Colligative Properties
Follow the directions in the lab write up. Record the requested data below to submit for your lab. Only report the information asked for. Do NOT add rows to the data tables.
Data Table 1. Dialysis Tubing Results or Egg results (6pts)
|
Time |
Mass of Dialysis Tubing and Contents |
|
0 minutes |
17.2g |
|
30 minutes |
20.9g |
|
60 minutes |
25.2g |
Questions (4pts)
A. In your experiment, is the light corn syrup in the dialysis tubing (or outside the egg) hypertonic or hypotonic? Explain your reasoning.
Hypertonic because the corn syrup gained the mass over the given time as we can see in Table 1.
Exercise 2: Freezing Point
Data Table 2. Temperature Readings for Freezing Point. (10pts) **Remember your sig figs!
|
Time (seconds) |
Temp (°C) of control (tap water) |
Temp (°C) of solution + 0.5 tsp (~2.5 mL) salt |
Temp (°C) of solution + 1.0 tsp (~5 mL) salt |
|
30 |
4 |
2 |
0 |
|
60 |
3 |
1 |
0 |
|
90 |
3 |
1 |
-1 |
|
120 |
3 |
1 |
-1 |
|
150 |
2 |
1 |
-1 |
|
180 |
2 |
1 |
-2 |
|
210 |
1 |
1 |
-2 |
|
240 |
1 |
1 |
-2 |
|
270 |
1 |
1 |
-2 |
|
300 |
1 |
1 |
-2 |
|
330 |
1 |
1 |
-2 |
|
360 |
1 |
1 |
-2 |
|
390 |
1 |
1 |
-2 |
|
420 |
1 |
1 |
-2 |
|
450 |
1 |
1 |
-2 |
|
480 |
1 |
1 |
-2 |
|
510 |
1 |
1 |
-2 |
|
540 |
0 |
1 |
-2 |
|
570 |
0 |
0 |
-2 |
|
600 |
0 |
0 |
-2 |
Data Table 3. Graph of Data. (10pts)
|
Graph of Data |
|
|
INSERT YOUR GRAPH ABOVE. THIS GRAPH CAN BE HANDDRAWN OR DRAWN WITH A PROGRAM LIKE EXCEL
Exercise 3: Colligative Properties: Boiling Point
Data Table 4. Temperature Readings for Boiling Point. (6 pts)
|
|
Temp (°C) of control (tap water) |
Temp (°C) of solution + 0.5 tsp (~2.5 mL) salt |
Temp (°C) of solution + 1.0 tsp (~5 mL) salt |
|
Temperature at Rolling Boil |
101 ºC |
104 ºC |
106 ºC |
Questions (4pts)
A. Compare the three boiling points. Is there a relationship between the amount of solute in the solution and the boiling temperature? Compare the three freezing points. Is there a relationship there between the amount of solute in the solution and the freezing temperature? Write 1 conclusion sentence to sum it all up.
When more solute is added it increased the boiling temperature of the solution where in freezing point when more solute is added, the colder the temperature got as time passes.
Temperature (?C) vs. Time (sec)
y = -0.0055x + 3.1211
30.0 60.0 90.0 120.0 150.0 180.0 210.0 240.0 270.0 300.0 330.0 360.0 390.0 420.0 450.0 480.0 510.0 540.0 570.0 600.0 4.0 3.0 3.0 3.0 2.0 2.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.0 0.0 0.0
y = -0.0014x + 1.3842
30.0 60.0 90.0 120.0 150.0 180.0 210.0 240.0 270.0 300.0 330.0 360.0 390.0 420.0 450.0 480.0 510.0 540.0 570.0 600.0 2.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 0.0 0.0
y = -0.0028x - 0.7737
30.0 60.0 90.0 120.0 150.0 180.0 210.0 240.0 270.0 300.0 330.0 360.0 390.0 420.0 450.0 480.0 510.0 540.0 570.0 600.0 0.0 0.0 -1.0 -1.0 -1.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0 -2.0
TIME (seconds)
TEMPERATURE ?C
