The flocculation value of \( \mathrm{HCl} \) for arsenic sulphide sol. is \( 30 \mathrm{~m} \mat...

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The flocculation value of \( \mathrm{HCl} \) for arsenic sulphide sol. is \( 30 \mathrm{~m} \mathrm{~mol} \mathrm{~L}^{-1} \). if \( \mathrm{H}_{2} \mathrm{SO}_{4} \) is used for the flocculation of
\( \mathrm{P} \) arsenic sulphide, the amount, in grams, of \( \mathrm{H}_{2} \mathrm{SO}_{4} \) in 250

W \( \mathrm{ml} \) required for the above purpose is
(Molecular mass of \( \mathrm{H}_{2} \mathrm{SO}_{4}=98 \mathrm{~g} / \mathrm{mol} \) )
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