The flocculation value of HCl for arsenic sulphide sol. is 30mmolL- 1. If H2SO4 is used for the flocculation of arsenic sulphide, the amount, in grams, of H2SO4 in 250ml required for the above purpose is (molecular mass of H2SO4=98 g/mol )

Question

The flocculation value of HCl for arsenic sulphide sol. is 30mmolL- 1. If H2SO4 is used for the flocculation of arsenic sulphide, the amount, in grams, of H2SO4 in 250ml required for the above purpose is (molecular mass of H2SO4=98 g/mol ) (A) 0.1838 (B) 0.3864 (C) 0.3675 (D) 0.1218

Tardigrade Admin · Accepted Answer

arrow 1 litre solution of 30 m mol of HCl is required arrow For 1 litre solution 15 m mol H2 textS textO4 is required. 250 ml of solution required: (15/4)× 10- 3 (m mol) of H2SO4 =0. text3675 gm

Q. The flocculation value of $H Cl$ for arsenic sulphide sol. is $30 mm o l L^{- 1} .$ If $H_{2} S O_{4}$ is used for the flocculation of arsenic sulphide, the amount, in grams, of $H_{2} S O_{4}$ in $250 m l$ required for the above purpose is
(molecular mass of $H_{2} S O_{4} = 98 g / m o l$ )

0.1838

0.3864

0.3675

0.1218

$\to$ 1 litre solution of 30 m mol of $H Cl$ is required
$\to$ For 1 litre solution 15 m mol $H_{2} S O_{4}$ is required.
250 ml of solution required: $\frac{15}{4} \times 1 0^{- 3}$ (m mol) of $H_{2} S O_{4}$
$= 0. 3675 gm$

Q. The flocculation value of HCl for arsenic sulphide sol. is 30mmolL−1. If H2​SO4​ is used for the flocculation of arsenic sulphide, the amount, in grams, of H2​SO4​ in 250ml required for the above purpose is (molecular mass of H2​SO4​=98g/mol )