Molality m is defined as:
AMass per kg
BMoles of solute per kg of SOLVENT (temperature independent)
CMoles of solute per liter of solution
DSame as molarity
Answer & Solution
Correct answer: B. Moles of solute per kg of SOLVENT (temperature independent)
m = moles solute / kg solvent. T-independent (mass doesn't change with T). Preferred in colligative property calculations (involve temperature).
Related questions
The mass of NaOH (M = 40 g/mol) required to prepare 500 mL of a 0.20 M NaOH solution isWhich of these solutions will boil at the highest temperature at 1 atm?The molality of a 1 M aqueous NaCl solution (density = 1.04 g/mL, NaCl M = 58.5 g/mol) is Osmotic pressure π of a dilute solution obeys π = C R T. Here C representsVan't Hoff factor i > 1 for a solute indicatesA negative deviation from Raoult law is expected whenIf a solute dimerises in solution, its observed molar mass compared with the calculated vaWhich of the following is NOT a colligative property?