Question

Why active mass of a solid is taken as unity?

Answer 1

Active massis defined as the molar concentration ie. number of Gram-moles per litre. ... Molar concentration is directly proportional to density. Since density ofsolidor liquid always remains constant, theactive massistakenas1 For solids or liquids, as mass decreases the volume also decreases by a proportional amount. 1000L water and 10mL water both have molar densities of 55.5 mol/L. Thus active mass of a solid is taken as unity