Which of the following ionic species has the | vedclass

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(D) According to the Hardy-Schulze rule,the precipitating power of an ion is directly proportional to its valency (charge).Greater the magnitude of th

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$Al^{3+}$

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(D) According to the Hardy-Schulze rule,the precipitating power of an ion is directly proportional to its valency (charge).Greater the magnitude of the charge on the ion,the higher is its precipitating power.Comparing the charges: $Na^{+}$ $(+1)$,$Cu^{2+}$ $(+2)$,$Al^{3+}$ $(+3)$,$SO_4^{2-}$ $(-2)$.Since $Al^{3+}$ has the highest magnitude of charge $(+3)$,it has the highest precipitating power.

Which of the following ionic species has the highest precipitating power?

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