Skip to content

Chemistry · Ch 1 — Some Basic Concepts of Chemistry

Molality

4

Molality

Molality (m)

Molality is defined as the number of moles of solute present in 1 kg of solvent. It is denoted by m:

m=Number of moles of soluteMass of solvent in kgm = \frac{\text{Number of moles of solute}}{\text{Mass of solvent in kg}}

Important

Molality does not change with temperature, because mass (unlike volume) is unaffected by temperature. Note also that a solution of a desired concentration is often prepared in the laboratory by diluting a solution of known higher concentration — the solution of higher concentration is called a stock solution. …

Start your 14-day free trial to unlock the full solution →
← Previous · 3MolarityNext · EXERCISES →NCERT Textbook Exercises -- Supplementary Data Tables