Which of the following electrolytes will have maximum coagulating value for $A g I / A g^{+}$ sol?

N a_{2} S

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N a_{3} P O_{4}

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N a_{2} S O_{4}

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N a C l

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Solution

The correct option is B $N a_{3} P O_{4}$
Electrolyte Anionic part Charge on anion}
$N a_{2} S$ $S^{2 -}$ $2$
$N a_{3} P O_{4}$ $P O_{4}^{3 -}$ $3$
$N a_{2} P O_{4}$ $S O_{4}^{2 -}$ $2$
$N a C l$ $C l^{-}$ $1$
According to hardy-schulze law, greater the charge on anion greater will be its coagulating power.

So, $P O_{4}^{3 -}$ have highest charge hence highest coagulating power.

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A g I / A g^{+}

The electrolyte having maximum floccualtion value for $A g I / A g^{+}$ solution is:

A g I / {A g}^{+}

N a C l

N a_{2} S O_{4}

N a_{3} P O_{4}

A g I / {A g}^{+}

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