A 100 Mmol/L Solution of MgCl₂ Would Be Expected to Have

Question

A 100 mmol/L solution of MgCl2would be expected to have an osmolality of which of the following?
A)50 mOsm/kg H2O
B)100 mOsm/kg H2O
C)200 mOsm/kg H2O
D)300 mOsm/kg H2O
E)350 mOsm/kg H2O

Accepted Answer

MgCl2 dissociates into three ions (Mg2+ and 2 Cl-), so a 100 mmol/L solution results in 300 mmol/L of particles, equating to an osmolality of 300 mOsm/kg H2O.

A 100 mmol/L solution of MgCl2 would be expected to have an osmolality of which of the following?

A 100 mmol/L solution of MgCl₂ would be expected to have an osmolality of which of the following?