Characterize EACH of the three given statements as being TRUE or FALSE and then indicate the collective true-false status of the statements using the choices. (1) To find the molarity of a solution, both solution volume and the number of moles of solute must be known.
(2) Osmosis involves the passage of solvent from a dilute solution (or pure solvent) into a more concentrated solution.
(3) 5.0 %(m/v) glucose solution and 0.9 %(m/v) sodium chloride solution have the same osmolarity and are hypotonic relative to red blood cells.
A) All three statements are true.
B) Two of the three statements are true.
C) Only one of the statements is true.
D) None of the statements is true.

Question

Quizplus · Accepted Answer

1) True - Molarity is defined as the number of moles of solute per liter of solution, requiring knowledge of both the amount of solute (in moles) and the volume of the solution. 2) True - Osmosis is the movement of solvent molecules through a semipermeable membrane from a region of lower solute concentration to a region of higher solute concentration. 3) False - The osmolarity of solutions depends on the total concentration of all solute particles. A 5.0% glucose solution and a 0.9% sodium chloride solution do not necessarily have the same osmolarity because osmolarity depends on the number of particles in solution, and sodium chloride dissociates into two particles (Na+ and Cl-), while glucose does not dissociate.

Characterize EACH of the Three Given Statements as Being TRUE