Assuming complete dissociation of all solutes, which of the following solutions would be hyperosmotic to $1 \mathrm{mM} \mathrm{NaCl}$ ?

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[III A]. Osmolarity is the concentration of particles (osmolarity $=\mathrm{g} \times \mathrm{C}$ ). When two solutions are compared, that with the higher osmolarity is hyperosmotic. The $1 \mathrm{mM} \mathrm{CaCl}_{2}$ solution (osmolarity $=3 \mathrm{mOsm} / \mathrm{L}$ ) is hyperosmotic to $1 \mathrm{mM} \mathrm{NaCl}$ (osmolarity $=2 \mathrm{mOsm} / \mathrm{L}$ ). The $1 \mathrm{mM}$ glucose, $1.5 \mathrm{mM}$ glucose, and $1 \mathrm{mM}$ sucrose solutions are hyposmotic to $1 \mathrm{mM} \mathrm{NaCl}$, whereas $1 \mathrm{mM} \mathrm{KCl}$ is isosmotic.

Assuming Complete Dissociation of All Solutes, Which of the Following 1mMNaCl1 \mathrm{mM} \mathrm{NaCl}1mMNaCl

Assuming Complete Dissociation of All Solutes, Which of the Following $1 \mathrm{mM} \mathrm{NaCl}$