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Problem 6 Easy Difficulty

The arrow in Figure P11.6 indicates the direction of solvent flow through a semipermeable membrane in equipment designed to measure osmotic pressure. Which solution, A or B, is more concentrated? Explain your answer.

Answer

Solvent A has a higher concentration. The definition of osmosis is the movement of a solvent from a low concentration to a high concentration.

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Video Transcript

Okay, so this is problem 11.6 in chemistry of the science in context textbook at the end of chapter 11. Okay. And but they've given us is an image where there's a semi permeable membrane. So this is our semi permeable remembering this line separating solutions A and B remember, semi impermeable memories only allows certain molecules to pass through. For the most part, solvents can go through the semi impermeable membrane, and the large particles that make a solution cannot. Okay, so what they've shown is that the solvent is flowing from this side of the membrane to this. This is the flow of the solvent. Okay? And it asks which is more causing fatal air B and what? OK, so solution A is the more concentrated okay. And the reason why is because generally, solvents will flow from a low to high soul you to concentration base. So solvents move from low to high. Saul, you'd concentration Senate Trey Shin Ok? And if we were to think about this conceptually, let's say that we have solution A which is a soul. That solution be a different type of salt. Okay. And the solvent that's flow. England's for example, say is water. If we had a low concentration of solution be, That means that there are more water molecules. There's lots of water molecules hanging out dissolves, dissolving the solution Be okay, um, and then in solution A, there's a higher concentration. So what will happen is the water will be driven to go to solution pay in an attempt to try to dilute solution A is what What we want in nature is a balance, right? You know, in the natural world, we usually wanna have some type of equilibrium or balance. And so we want to have a an equal concentration of solution and solution be across the membrane. Okay. And so what will happen is water. Any solvent will attempt to will move across this the semi permeable membrane in an attempt of dilute solution. Okay, okay. And so that is an example of osmotic pressure. A the the, um, be driving force that moves water from a low concentration of solid to a high concentration of solid

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