100ml of 0.0018% (w/v) solution of Cl^- ion was the minimum concentration of Cl^- required to precipitate a negative sol in one h. THE coagulating value of Cl^- ion is_________.

(Nearest integer)

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Vishal Baghel | Contributor-Level 10

6 months ago

Wt of Cl^- in 100 ml = 1.8 * 10^-3 gm

Mol. of Cl^- in 100 ml = $\frac{1.8 * 1 0^{- 3}}{35.5} = 0.0507 * 1 0^{- 3} m o l e$

$∴ [C l^{-}] = \frac{0.0507 * 1 0^{- 3} * 1000}{100} = 5.07 * 1 0^{- 4} M$

i.e. 0.507 milli mole in one lit required in one hr.

Coagulation value = (millimole/lit) required in one hr = 0.507

= 1 (the nearest integer)

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100ml of 0.0018% (w/v) solution of Cl- ion was the minimum concentration of Cl- required to precipitate a negative sol in one h. THE coagulating value of Cl- ion is_________. (Nearest integer)

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