In chemistry, molality is a measure of the amount of solute in a solution relative to a given mass of solvent. This contrasts with the definition of molarity which is based on a given volume of solution. A commonly used unit for molality is moles of solute per kilogram solvent (mol/kg). A solution of concentration 1 mol/kg is often written as 1 molal (or 1 m). Molality is the term used to express the concentration of the solution. The concentration of a solution is defined as the measure of the quantity of one substance when it is mixed with another substance. Let's learn about Molality in detail, including its definition, SI unit formula, and solved examples. Definition of Molality The molality of a solution is defined as the number of moles of a solute per kilogram of solvent. It depends on the mass of the solvent. It is also referred to as ... Molality is one of the important properties of solutions. It is used to express the concentration of a solute in a solution and mostly depends on the mass of the solvent. Molality A final way to express the concentration of a solution is by its molality . The molality (m) of a solution is the moles of solute divided by the kilograms of solvent. A solution that contains 1.0 mol of NaCl dissolved into 1.0 kg of water is a "one-molal" solution of sodium chloride. The symbol for molality is a lower-case m written in italics. Molality (m) = moles of solute kilograms of solvent = mol kg Molality differs from molarity only in the denominator. While molarity is based ...
