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Q.
Equivalent weight of a metal is $4.5$ and the molecular weight of the chloride is $80$ . The valency of the metal is______
Some Basic Concepts of Chemistry
Solution:
Valency of metal $=x$
Atomic weight of the metal $=$ Eq. wt. $\times x =4.5 x$
Formula of the metallic chloride $= MCl _{ x }$
Mol. weight of the chloride $=4.5 x +35.5 x$
$=40 x-80$
Hence $x =$ valency of the metál $=\frac{80}{40}=2$