How does sodium cyanide act as depresant in preventing ZnS from formin – InterviewSolution

1.	How does sodium cyanide act as depresant in preventing ZnS from forming the froth ?
Answer» Solution :Sodium CYANIDE combines with ZnS to form a COMPLEX `Na_2 [Zn(CN)_4]` on the surface of ZnS and therefore, it PREVENTS it from FORMING the froth . ` ZnS + 4NaCN to underset("tetracyanidozincate (II)")underset("Sodium")(Na_2 [Zn(CN)_4]) + Na_2 S`

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