1. l\'onicity Problems In the diagram below are two solutions (A and B) Use this
ID: 3506037 • Letter: 1
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1. l'onicity Problems In the diagram below are two solutions (A and B) Use this as the starting condition for the questions separated by a membrane permeable to water but nol solutes. below. A. B. 480 osmoles 10 liters 6 liters a, In this initlal condition, what is the osmolarly of In this initial condition, what is the osmolarity of solution B? b. If you compare osmolarities of solution A to B, solution A is to B. d. After all osmosis has occurred, what will the osmolarity of compartment A be? How much total water has moved into or out of compartment A? e. If a 5 liter solution with 20 osmoles of sucrose (A) is separated from a 2 liter solution with 10 osmoles of sucrose (B) by a membrane impermeable to sucrose and permeable to water, in which direction will movement of water occur? 2. a. from-solution B to solution A b. from solution A to solution B (A 4 OsM, B-5 OsM) c. to solution A and then back to solution B d. to solution B and then back to solution A e. there will be no movement of water in this case 3. A 300 mOsM urea solution is a. hyposmotic to a 200 mM solution of NaCI. (200mM NaC 400 mOsM) .b. hyperosmotic to a 200 mM solution of NaCl. c. isosmotic to a 200 mM solution of NaCl. d. isosmotic to a 600 mM solution of NaCtI e. isosmotic to a 0.18 % solution of NaCl. 4. What are the two extracellular fluid compartments in the body?Explanation / Answer
Answer 1---Osmolarity= oSMOLES/LITER OF SOLUTION
= osmolarity of solution A= 480/10=48 osmoles/l
= osmolarity of solution B=252=42 osmoles/l
b) solution A is hyperosmotic to B.
c)Water move from solution A to solution B.
Answer 2- solution A osmolarity= 20/5=4 OSM
Solution B osmolarity= 10/2=5 OsM
sO WATER MOVES FROM SOLUTION A to solution B.
Answer b is correct.
Answer 3- A 300mOsM urea solution is hypoosmotic to a 200 mM solution of NaCl. The osmotic pressure is measured by the van't Hoff equation: = icRT, where "ic" represents osmolarity. The van't Hoff factor is equal to how many particles the solute dissociates in to. For example, NaCl dissociates into Na+ and Cl-, so the van't Hoff factor is 2. Urea does not dissociate.
aNSWER A is correct
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