Question

12. Among sodium phosphate, sodium sulphate and sodium
chloride the solubility in water decreases as :
(a) sulphate > phosphate > chloride
(b) chloride > sulphate > phosphate
(c) chloride > phosphate > sulphate
(d) phosphate > chloride > sulphate​

Answer 1

Answer:

12.(a) sulphate>phosphate>chloride

Explanation:

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Answer 2

Answer:

Solubility is directly proportional to size ratio .

Now , size ratio of phosphate is greatest and size ratio of chlorine is lowest .

Hence , correct option is – ( a )

CONCEPT :

Solubility is inversely proportional to lattice enthalpy .

Lattice enthalpy is inversely proportional to size ratio .