Question

question 6 (mandatory) (2 points) a semipermeable sac filled with a solution containing 4% nacl, 9% glucose, and 10% albumin is suspended in a solution with the following composition: 10% nacl, 10% glucose, and 40% albumin. the diagram below illustrates the solutes inside and outside of the sac. assume that the sac is permeable to all substances except albumin (meaning nacl, glucose, and water can pass through the bag’s membrane). with respect to net movement, state whether each of the following will: move into the sac, move out of the sac, or not move. make sure you spell your answer correctly because blackboard will automatically mark it wrong even if you misspell by a letter. a. what will happen to glucose? (you can ignore all the other components and just think about what glucose will do according to to its concentration) b. what will happen to water overall? (you can think about the total concentration of all solutes in the bag and the beaker) c. what will happen to albumin? (again, you can ignore the other components and just think about the albumin. keep in mind whether albumin can cross the membrane or not) d. what will happen to nacl? (again, you can ignore the other components, and only look at the nacl concentrations) question 7 (mandatory) (1 point) partially visible

Explanation:

Part A: Glucose Movement

Step1: Identify Glucose Concentrations

Inside sac: \( 9\% \) glucose; Outside sac: \( 10\% \) glucose. Wait, no—wait, the sac (the yellow bag) has \( 9\% \) glucose, and the beaker (outside) has \( 10\% \) glucose? Wait, no, re-reading: The sac is filled with \( 4\% \) NaCl, \( 9\% \) glucose, \( 10\% \) albumin. The beaker (outside) has \( 10\% \) NaCl, \( 10\% \) glucose, \( 40\% \) albumin. Wait, no—wait the diagram: Sac (inside) has \( 4\% \) NaCl, \( 9\% \) glucose, \( 10\% \) albumin. Beaker (outside) has \( 10\% \) NaCl, \( 10\% \) glucose, \( 40\% \) albumin. Wait, glucose: inside sac is \( 9\% \), outside is \( 10\% \)? Wait no, maybe I misread. Wait the problem says: "A semipermeable sac filled with a solution containing \( 4\% \) NaCl, \( 9\% \) glucose, and \( 10\% \) albumin is suspended in a solution with the following composition: \( 10\% \) NaCl, \( 10\% \) glucose, and \( 40\% \) albumin." So sac (inside) glucose: \( 9\% \); outside glucose: \( 10\% \)? Wait, no—wait, the sac is the yellow bag: in the diagram, sac has \( 4\% \) NaCl, \( 9\% \) glucose, \( 10\% \) albumin. Beaker (outside) has \( 10\% \) NaCl, \( 10\% \) glucose, \( 40\% \) albumin. So glucose concentration inside sac: \( 9\% \), outside: \( 10\% \)? Wait, no, that would mean outside is higher. But wait, maybe I flipped. Wait, the sac is the internal solution: \( 4\% \) NaCl, \( 9\% \) glucose, \( 10\% \) albumin. External (beaker): \( 10\% \) NaCl, \( 10\% \) glucose, \( 40\% \) albumin. So glucose: inside \( 9\% \), outside \( 10\% \). Wait, but the question is "what will happen to glucose? (you can ignore all the other components and just think about what glucose will do according to its concentration)". Wait, net movement of solute is from higher concentration to lower concentration. Wait, outside glucose is \( 10\% \), inside is \( 9\% \)? No, wait, no—wait the sac is filled with \( 4\% \) NaCl, \( 9\% \) glucose, \( 10\% \) albumin. The beaker has \( 10\% \) NaCl, \( 10\% \) glucose, \( 40\% \) albumin. So glucose concentration: inside sac is \( 9\% \), outside is \( 10\% \). Wait, that would mean outside is higher, so glucose would move into the sac? No, wait, no—wait, maybe I misread the sac's glucose. Wait the diagram: sac has \( 9\% \) glucose, beaker has \( 10\% \) glucose? Wait, no, the problem says "sac filled with... \( 9\% \) glucose" and "suspended in a solution with... \( 10\% \) glucose". So glucose: inside \( 9\% \), outside \( 10\% \). Wait, but net movement is from high to low. So outside is higher, so glucose would move into the sac? Wait, no—wait, \( 10\% \) outside, \( 9\% \) inside. So the concentration gradient is outside (10%) > inside (9%), so glucose will move from outside to inside? Wait, no—wait, the sac is semipermeable, but the problem says "the sac is permeable to all substances EXCEPT albumin (meaning NaCl, glucose, and water CAN pass through the bag’s membrane)". So glucose can pass. So glucose will move from higher concentration (outside, 10%) to lower concentration (inside, 9%)? Wait, no—inside is 9%, outside is 10%, so outside is higher. So glucose moves into the sac (from outside to inside) to reach equilibrium. Wait, yes: because outside glucose is 10%, inside is 9%, so net movement is into the sac.

Part B: Water Movement

Step1: Calculate Total Solute Concentration

Total solute inside sac: \( 4\% \, \text{NaCl} + 9\% \, \text{glucose} + 10\% \, \text{albumin} = 23\% \).
Total solute outside sac: \( 10\% \, \text{NaCl} + 10\% \, \text{glucose} + 40\% \, \text{albumin} = 60\% \).
(Note: Albumin cannot cross, but water can. Water moves from low solute concentration (high water potential) to high solute concentration (low water potential).)

Step2: Determine Water Movement

Inside total solute: \( 23\% \); Outside total solute: \( 60\% \).
Since outside has a higher total solute concentration, water will move out of the sac (from inside, lower solute/higher water potential, to outside, higher solute/lower water potential) to dilute the outside or concentrate the inside, until equilibrium.

Part C: Albumin Movement

The problem states: "the sac is permeable to all substances EXCEPT albumin". Thus, albumin cannot pass through the membrane, so there will be no net movement of albumin.

Part D: NaCl Movement

Answer:

move into the sac