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Question: sol can be more easily coagulated by \(\mathrm { NaPO } _ { 4 }\) in comparison than KCl because...

sol can be more easily coagulated by NaPO4\mathrm { NaPO } _ { 4 } in comparison than KCl because

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(a) Mass of NaPO4\mathrm { NaPO } _ { 4 } is more than KCl hence it is more effective than KCl

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(b) Phosphate ion has higher negative charge than Cl\mathrm { Cl } ^ { - } ion hence are more effective for coagulations

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(c) KCl is more soluble than hence less effective for coagulations

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(d) ions are more effective than ions for coagulations

Explanation

Solution

(b)

Sol. Ferric hydroxide is a positively charged sol hence ions carrying negative charge can coagulate it. Since PO43\mathrm { PO } _ { 4 } ^ { 3 - } has higher negative charge than Cl\mathrm { Cl } ^ { - }hence it is more effective for coagulations.