Three (3)eggs are boiled and all weigh 2g.The eggs are placed in a 15% solution of NaCl and reweighed after 30 minutes.
McGraw-Hill Education
-Which egg is isotonic to the solution?
A)Egg 1
B)Egg 2
C)Egg 3

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.
  McGraw-Hill Education
-Which egg is isotonic to the solution?
A)Egg 1 
B)Egg 2 
C)Egg 3

Quizplus · Accepted Answer

Isotonic solutions have equal concentrations of solutes as the solution they are in, meaning there is no net movement of water. Egg 2 is the only egg that is still the same weight after being placed in the 15% NaCl solution, indicating that it is isotonic to the solution. Eggs 1 and 3 likely lost weight due to water moving out of the egg into the hypertonic solution or gained weight due to water moving into the egg from the hypotonic solution, respectively.

Three (3)eggs Are Boiled and All Weigh 2g