Question

In an experiment, a membrane bag containing 95% water and 5% salt was placed in a beaker containing 80% water and 20% salt. Based on the information given, state one way the bag and its content would have changed the next day. Support your answer with an explanation.

A. The bag would have gained weight as water would have diffused into it.
B. The bag would have lost weight as water would have diffused out of it.
C. The concentration of salt in the bag would have increased.
D. The concentration of salt in the bag would have decreased.

Answer 1

The membrane bag in the experiment would have lost weight as water diffused out of it due to osmosis, moving from a higher water concentration inside the bag to a lower concentration outside in the beaker.

Step-by-step explanation:

In the experiment where a membrane bag containing 95% water and 5% salt was placed in a beaker containing 80% water and 20% salt, the bag and its content would have experienced osmotic movement. The correct answer is B. The bag would have lost weight as water would have diffused out of it. This is because water moves from an area of higher concentration to an area of lower concentration through the process of osmosis, which is the diffusion of water across a semipermeable membrane. Since the water concentration inside the bag is higher than outside in the beaker, water would move out of the bag into the beaker. This would result in the bag losing weight due to the loss of water.