The flocculation value of HCl for arsenic sulphide sol.
is 30 m mol L-1 If H2SO4 is used for the flocculatiopn of arsenic sulphide, the amount in grams, of H2SO4 in 250 ml required for the above purposed is ______.
(molecular mass of H2SO4 = 98 g/mol)
Answer (integer)
0
Solution
Arsenic sulphide sol is negatively charged, so for flocculation
positive ion required. Here positive ion H<sup>+</sup> present.
<br><br>for 1 L, 30 mm moles of H<sup>+</sup> is required
<br><br>for 250 ml, ${{30} \over 4}$ mm moles H<sup>+</sup> is required
<br><br>$\therefore$ for 250 ml, ${{30} \over {4 \times 2}}$ mm moles H<sub>2</sub>SO<sub>4</sub> is required.
<br><br>$\therefore$ Weight of H<sub>2</sub>SO<sub>4</sub> required = ${{30} \over {4 \times 2}} \times {10^{ - 3}} \times 98$
<br><br> = 0.3675 g
About this question
Subject: Chemistry · Chapter: Some Basic Concepts of Chemistry · Topic: Mole Concept
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