Question

Aug molarity, but a few extra rules or particles in an que fes extra rules must be taken to consideration. Osmolarity is abbreviated OsM. Example 1: Consider a solution that is both 0.5 M plnen fore 1 L of this solution contains 0.5 moles of glucose AND A acid. This is a total of 1 mole of stuff" per 1 Liter of water. Thus solution is 1 OsM. 1 glucose and 0.5 M of an amino acid AND 0.5 moles of amino water. Thus, the osmolarity of the Example 2: A IM NaCl solution will have 1 mole of NaCl per 1 Lite However, since NaCl is a salt, it dissolves in water into its respective ions: Na and . Thus, each salt "particle" actually dissolves into two particles in water. The tre osmolarity, then, is double the molarity. This solution is 2 OsM. Rule of Thumb: Since water dissociates most ions, salts always have a higher osmolarity than malam For example, CaCl, dissolves into Ca' and 2 C ions. Thus, the osmolarity is 3x the molarity for this sale 3) A solution has 10 mM of glucose and 25 mM of albumin protein. What is the osmolarity of this solution? 4) A solution contains 50 mM NaCl, 20 mM glucose, and 10 mM albumin. What is the osmolarity of this solution? It is straightforward to compare osmolarity between a cell and a solution. A solution with a higher osmolaritie hvernem

Answer 1

3. Molarity of Solution is = molarity of glucose + molarity of albumin protein

= 10 mM + 25 mM = 35mM = 0.035M

Here both glucose ( a sugar ) and albumin( a protein ) don't dissociate in solvent to give ions as the salts do. So the molarity of the solution is the osmolarity. 0.035 is the osmolarity of the solution.

4. Molarity of Solution is = molarity of NaCl + molarity of glucose + molarity of albumin protein

= 50mM + 20 mM + 10 mM

Osmolarity of Solution is = osmolarity of NaCl + osmolarity of glucose + osmolarity of albumin protein

= 2*50mM + 20 mM + 10 mM = 130mM = 0.13 OsM

Here NaCl is a salt which gives 2 ions such as Na+ and Cl- ion in solvent. So its osmolarity is two times of the molarity.

0.13 is the osmolarity of the solution.