Determine the molality of an aqueous solution prepared by dissolving 0.224 moles of LiBr in 27.4 moles of H₂O. A) 0.454 m B) 0.220 m C) 0.818 m D) 0.122 m E) 0.153 m

Question

Quizplus · Accepted Answer

Molality is calculated as moles of solute per kilogram of solvent. Here, the solvent is water (H2O), but the question mistakenly uses "H₂O" instead. Assuming 27.4 moles of water, and knowing 1 mole of water weighs approximately 18 grams, 27.4 moles weigh about 492.2 grams or 0.4922 kilograms. Molality = 0.224 moles LiBr / 0.4922 kg H2O ≈ 0.454 m.

Determine the Molality of an Aqueous Solution Prepared by Dissolving