Question

Suppose that you have a solution of 5% sugar water in a bag. The bag is semipermeable: Water molecules can pass into and out of it, but sugar molecules cannot. Predict what will happen to the mass of the bag if you put it into each of the following:

A beaker of pure water
A beaker of 5% sugar water
A beaker of 7% sugar water

Answer 1

The mass of the bag will increase in pure water due to osmosis, will remain unchanged in 5% sugar water (isotonic), and will decrease in 7% sugar water as water moves out to reach equilibrium (hypertonic).

Step-by-step explanation:

The phenomenon at work here is osmosis, which is the diffusion of water across a semipermeable membrane from an area of lower solute concentration to an area of higher solute concentration.

• When the bag with 5% sugar solution is placed in a beaker of pure water, water molecules will move into the bag, causing the mass of the bag to increase. This is because the pure water has a higher water concentration compared to the sugar solution inside the bag (hypotonic environment).
• If the bag is placed in a beaker of 5% sugar water, there will be no net movement of water molecules into or out of the bag, as the concentrations inside and outside the bag are the same (isotonic environment).
• When the bag is placed in a beaker with 7% sugar water, water will move out of the bag into the beaker, resulting in a decrease in the mass of the bag. The beaker solution has a lower water concentration (hypertonic environment).

Osmosis will continue until there is an equilibrium achieved or until the osmotic pressure is counteracted by the mechanical or structural features of the system.

Answer 2

There will be to much sugar to drink from the water or you can and go to the hospital.