Quadratic equation involves following chemical composition in salinity formulation *
NaCl, CaCl2, MgSO4, Na2SO4
Only NaCl NaCl and MgSO4, CaCl2 CaCl2 and MgSO4
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Explanation:
Correct option is C)
Sb
2
S
3
is a negative sol.
Al
2
(SO
4
)
3
will be the most effective coagulant due to higher charge density on Al
3+
by the Hardy-Schulze rule.
According to the Hardy-Schulze rule, the greater the valency of active ion, greater will be its coagulating power.
Thus, the Hardy-Schulze rule states the following:
i. The ions carrying the charge opposite to that of sol particles are effective in causing coagulation of the sol.
ii. The coagulating power of an electrolyte is directly proportional to the valency of the active ions (ions causing coagulation).
The order of effectiveness of cations is as follows:
Al
3+
>Ca
2+
>Na
+
>NH
4
+
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