What is Mole and What is equivalent? Relation Between them.

Mole

• It is the gram molecular weight of'a substance (if compound) or gram atomic weight of a
  substance (if element).
• Molecular weight or atomic weight of a substance expressed in gram.

Example:

• Atomic weight of calcium = 40; so one mole calcium = 40 I calcium'
• Molecular weight of HrSon = 98; so one mole H2So1= 98 I H2So4'
  Molecular weight of NacI = 58.5; so one mole Nacl = 58,5 g NaCl.
  Molecular weight of HrO = 18; so one mole HrO = 18 g HrO'

Equivalent:

• It is the gram equivalent weight of a substance
• Equivalent weight of a substance expressed in gram

Example:

• Equivalent weight of calcium = 20; so one equivalent calcium = 20 $ calcium'
• Equivalent weight of HrSOn = 49; so one equivalent H,SO, = 49 I H2SO4'

Relation Between Mole and Equivalent: