What is the osmolarity of a solution made by dissolving 25.0 g of the strong electrolyte KCl in 1.0 L of solution?
A)0.168 Osm
B)0.335 Osm
C)0.250 Osm
D)0.670 Osm
E)1.34 Osm

Question

Quizplus · Accepted Answer

The molar mass of KCl is approximately 74.55 g/mol. Dissolving 25.0 g of KCl gives 0.335 moles of KCl. Since KCl dissociates into two ions (K+ and Cl-), the osmolarity is 0.335 moles/L * 2 = 0.670 Osm.

What Is the Osmolarity of a Solution Made by Dissolving