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## Main Question or Discussion Point

Why does osmosis happens?

Does osmosis happens when we have osmotic pressure difference between the two solutions (that are connected by a membrane)?

Does osmosis happens when we have two solutions of different concentrations?

My professor told that osmosis happens because of the vapour pressure difference between the solutions. But I didn't understand what vapour pressure has to do with osmosis. Can you explain me that, please?

I've been thinking too and is the vapour pressure of a solution numerically equal to the osmotic pressure of that solution? I see this relation because I know the more concentred is the solution the bigger is it's vapour pressure... that's right?

How do I calculate vapour pressure? (Can I use p V = n R T?)

Does density of the solutions has anything to do with osmosis? And what about hidrostatic pressure?

Thank you for the help,

Rafael Andreatta

Does osmosis happens when we have osmotic pressure difference between the two solutions (that are connected by a membrane)?

Does osmosis happens when we have two solutions of different concentrations?

My professor told that osmosis happens because of the vapour pressure difference between the solutions. But I didn't understand what vapour pressure has to do with osmosis. Can you explain me that, please?

I've been thinking too and is the vapour pressure of a solution numerically equal to the osmotic pressure of that solution? I see this relation because I know the more concentred is the solution the bigger is it's vapour pressure... that's right?

How do I calculate vapour pressure? (Can I use p V = n R T?)

Does density of the solutions has anything to do with osmosis? And what about hidrostatic pressure?

Thank you for the help,

Rafael Andreatta