Which egg is isotonic to the solution?

Question

  Three (3) eggs are boiled and all weigh 2g. The eggs are placed in a 15% solution of NaCl and reweighed after 30 minutes.





A.  Egg 1

B.  Egg 2

C.  Egg 3



Clarify Question

· What is the key concept addressed by the question?

· What type of thinking is required?



Gather Content

· What do you know about osmosis? What other information is related to the question?   



Choose Answer

· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?

 

Reflect on Process

· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?

Answer 1

B.  Egg 2

Clarify Question
· What is the key concept addressed by the question?
        o The question asks about osmosis.
· What type of thinking is required?
        o You are being asked to apply your knowledge about osmosis.

Gather Content
· What do you know about osmosis? What other information is related to the question?   
        o In osmosis, water moves from an area that is more hypotonic to an area that is more hypertonic. If no water moves then the areas are isotonic

Choose Answer
· Given what you now know, what information and/or problem solving approach is most likely to produce the correct answer?
        o If egg 3did not change weight, then water was not entering or leaving the egg. If the solution was 15% salt, then it was isotonic relative to the egg.
 
Reflect on Process
· Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
        o This question asked you to apply your knowledge about osmosis. If you got the correct answer, great job! If you got an incorrect answer, where did the process break down? Did you realize that water was not leaving or entering the egg? Did you think that water moved towards a hypotonic solution?