Q. Fill in the blanks:
According to Werners coordination theory, there are ________ kinds of valency, _________ and _________. The primary valency of a central metal ion is satisfied with_________.

 1858  269 Coordination Compounds Report Error

Solution:

According to Werner's coordination theory, there are two kinds of valency, primary and secondary.
The primary valency of a central metal ion is satisfied with anions.
For example, in primary valency is and secondary valency is
Secondary valence refers to coordination number.
Since copper is coordinated to ammonia ligands, secondary valence is .
Primary valence is satisfied by anions.
Since sulphate ion has charge, primary valence is .