On which of the following properties does the coagulating power of an ion depend?

Options

A. The magnitude of the charge on the ion alone.
B. Size of the ion alone.
C. Both magnitude and sign of the charge on the ion
D. The sign of charge on the ion alone

Answer

C

Explanation

According to Hardy-Sxhulze rule, the greater the valency (magnitude of charge) of the flocculating ion (decided by sign of charge), the greater is its power to cause precipitation.