If a compound has molecular weight 180 and valence 3, its equivalent weight is

If a compound has molecular weight 180 and valence 3, its equivalent weight is

• A. 60
• B. 180
• C. 120
• D. 3

Answer: (A)

Equivalent weight is the mass of a substance that reacts with or supplies one mole of reactive units (such as H+, OH−, or electrons). It is found by dividing the molar (molecular) weight by the valence. Here, the molecule has a molecular weight of 180 and a valence of 3, so one mole provides 3 equivalents. 180 divided by 3 gives 60. Therefore, the equivalent weight is 60.

Equivalent weight is the mass of a substance that reacts with or supplies one mole of reactive units (such as H+, OH−, or electrons). It is found by dividing the molar (molecular) weight by the valence. Here, the molecule has a molecular weight of 180 and a valence of 3, so one mole provides 3 equivalents. 180 divided by 3 gives 60. Therefore, the equivalent weight is 60.