NAME: _____________________________________________________ PERIOD _____________
PROCEDURES
Day 1: Vinegar
1.
Measure on the scale and record the mass of the raw egg on the data table.
2.
Add 150 ml of vinegar to the cup, and carefully place the egg into the cup.
3.
Record observations on the data table.
4.
Cover the cup with saran wrap and secure with a rubber band.
Day 2: Syrup
1.
Record observations after 24 hours. Remove egg carefully and weigh the egg but keeping the liquid in the cup.
2.
Measure and record volume of liquid in the cup.
3.
Carefully rinse off the egg. Discard vinegar in the sink after volume taken and rinse cup.
4.
Add 150 ml of syrup to the cup and place the egg in the cup.
5.
Record observation in the data table.
6.
Cover egg back up with saran wrap and secure with a rubber band.
Day 3: Water
1.
Carefully remove egg from syrup, rinse egg and weigh the egg. Record observations.
2.
Measure and record the volume volume of liquid in the cup.
3.
Add 150 ml of water to the cup. Place egg into the water, and cover back up with saran wrap and rubber band.
Day 4: Conclusions
1.
Remove egg and do a final weighing of the egg.
2.
Record observations measure the volume of water in the cup.
3.
Clean up, discard eggs in the trash can, and throw cups away with the saran wrap. GIVE TEACHER BACK
RUBBER BANDS
4.
Answer final lab questions and turn in this paper.
PREDICTIONS :
1.
Will the egg gain or lose mass after being put into the following solutions for 24 hours?
Vinegar______ Syrup_______ Water________
2.
Will the volume of the liquid in the beaker increase or decrease after the egg has been placed in the following solutions for 24 hours?
Vinegar______ Syrup_______ Water________
DATA TABLE
Initial mass of the egg for today (grams)
Final mass of the egg after
24 hours
(grams)
Change in the mass of the egg
(+/- grams)
Initial volume of the solution
(mL)
Final volume of the solution after 24 hrs
(mL)
Change in the volume of the solution
(+/- mL)
VINEGAR
SYRUP
WATER

LAB QUESTIONS
1.
How did your predictions compare with the results?
2.
To what biological structure is the egg comparable?
3.
What passive process of moving molecules is demonstrated in this lab?
4.
What effect did the vinegar have on the egg?
5.
Did water move into or out of the egg when placed into syrup?
6.
Did water move into or out of the egg when placed into water?
7.
In which instance is the egg in a hypertonic solution?
8.
In which instance is the egg in a hypotonic solution?
9.
In which instance is the egg in an isotonic solution?
10.
Why do dried beans swell when they are cooked? (describe concentration of water)
11.
Why are vegetables sprinkled with water at the grocery store? Explain what happens and why this is important.
12.
Roads are sometimes salted to melt ice. What does the salting do to the plants on the side of the road? Why?