Question

19. Which of the following ions have minimum value of
flocculating power?
(a) PO4^3- (b) SO4^2- (c) So3^2-(d) NO3-​

Answer 1

Answer:

NO3-

Explanation:

Flocculating is defined as the precipitating ability of an ion, i.e how easily it can precipitate a sol.

Since all the options given are negatively charged ions, im assuming the sol in question is a positively charged sol.

According to Hardy-Schulz rule , the greater is the valence of the oppositely charged ion of the electrolyte added to a colloidal solution, the faster is the coagulation of the colloidal solution.

In this case, the ion with the maximum charge is PO4^3-, and the one with the least charge is NO3-.

Therefore, the ion with minimum value of flocculating power is NO3-

Answer 2

Question:

Which of the following ions have minimum value of

flocculating power?

(a) PO₄³⁻ (b) SO₄²⁻ (c) So₃²⁻(d) NO₃⁻

Concept:

Focculation :

It is aprocess by which colloids in a suspension could be aggregated.

Given:

We have to choose which ions have minumum value of focalatind power.

Options are (a) PO₄³⁻ (b) SO₄²⁻ (c) So₃²⁻(d) NO₃⁻.

Answer:

(d) NO₃⁻.

Explanation:

According to Hardy-Schulz rule , the greater is the valence of the oppositely charged ion of the electrolyte added to a colloidal solution, the faster is the coagulation of the colloidal solution.

Here, the ion with the maximum charge is PO₄³⁻, and the one with the minimum charge is NO₃⁻.

So the ion with minimum value of flocculating power  would be NO₃⁻.

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