Question #024f2

1 Answer
Jan 5, 2018

Answer:

The osmolar concentration of the solution is 1 Osmol/L.

Explanation:

An osmole (Osmol) is 1 mol of particles that contribute to the osmotic pressure of a solution.

For example

#"CaCl"_2"(s)" → "Ca"^"2+""(aq)" + "2Cl"^"-""(aq)"#
#color(white)(ll)"1 mol"color(white)(mmmll)"1 mol"color(white)(mmm)"2 mol"#

Thus,

#"1 mol CaCl"_2 ≡ "3 Osmol"#

Sodium lactate (#"NaLac"#) is the sodium salt of lactic acid.

It ionizes in solution according to the equation

#"NaLac(s)" → "Na"^"+""(aq)" + "Lac"^"-""(aq)" + #

Thus,

#"1 mol NaLac ≡ 2 Osmol"#

#(0.5 color(red)(cancel(color(black)("mol NaLac"))))/"1 L" × ("2 Osmol")/(1 color(red)(cancel(color(black)("mol NaLac")))) = "1 Osmol/L"#