Freezing temperature of corn syrup

Lab Report

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