The following data is obtained for coagulatin | vedclass

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(B) The coagulating value (or flocculation value) is defined as the minimum concentration of an electrolyte in millimoles per liter $(mmol \cdot L^{-1

Vedclass · Accepted Answer

$7 	imes 10^{-2}$

Vedclass · Answer

(B) The coagulating value (or flocculation value) is defined as the minimum concentration of an electrolyte in millimoles per liter $(mmol \cdot L^{-1})$ required to cause the precipitation of a sol in $2$ hours.From the provided data,the minimum concentration required for precipitation is $7 	imes 10^{-5} \ mol \cdot L^{-1}$.To convert this to the coagulating value in $mmol \cdot L^{-1}$:$	ext{Coagulating value} = 7 	imes 10^{-5} \ mol \cdot L^{-1} 	imes 10^3 \ mmol \cdot mol^{-1} = 7 	imes 10^{-2} \ mmol \cdot L^{-1}$.

Conc. of $Cl^{-}$ in $mol \cdot L^{-1}$	Result
$5 \times 10^{-5}$	Sol not precipitated
$6 \times 10^{-5}$	Sol not precipitated
$7 \times 10^{-5}$	Sol precipitated
$8 \times 10^{-5}$	Sol precipitated
$1 \times 10^{-4}$	Sol precipitated

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