Final answer:
Reverse osmosis is used in hydration bags to produce safe drinking water by separating potentially polluted water into a hypertonic solution containing ingestible solutes. Forward osmosis allows water to move through a selectively permeable membrane into the bag, producing safe drinking water.
Step-by-step explanation:
Reverse osmosis is a process that can be used to produce safe drinking water from potentially polluted water sources. Hydration bags use forward osmosis, where a selectively permeable membrane separates the potentially polluted water into a hypertonic solution containing ingestible solutes. The ingestible solutes, such as glucose, create a higher concentration inside the bag, allowing water to move through the membrane from the potentially polluted water to the bag, producing safe drinking water.