Consider the separate solutions of0.500 M C2H5OH (aq)0.100 M Mg3(P04)2(aq)0.250 M KBr(ag)0.125 MNa3PO4(aq)each at 25C.Which statement is true about these solutions assuming all salts to be strong electrolytes?[JEE Main 2014]a)They all have same osmotic pressureb)0.100 M Mg3(P04)2 (aq)has the highest osmotic pressurec)0.125 M Na3P04(aq)has the highest osmotic pressured)0.500 M C2H5OH(aq) has the highest osmotic pressureCorrect answer is option 'A'. Can you explain this answer?

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Consider the separate solutions of

0.500 M C₂H₅OH (aq)

0.100 M Mg₃(P0₄)₂(aq)

0.250 M KBr(ag)

0.125 MNa₃PO₄(aq)

each at 25°C.
Which statement is true about these solutions assuming all salts to be strong electrolytes?

[JEE Main 2014]

a)
They all have same osmotic pressure
b)
0.100 M Mg₃(P0₄)₂ (aq)has the highest osmotic pressure
c)
0.125 M Na₃P0₄(aq)has the highest osmotic pressure
d)
0.500 M C₂H₅OH(aq) has the highest osmotic pressure

Correct answer is option 'A'. Can you explain this answer?

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Consider the separate solutions of0.500 M C2H5OH (aq)0.100 M Mg3(P04)2...

(a) Salts have been assumed as strong electrolytes, van't Hoff factor, i = [1 + (y - 1)x]

y = number of ions from one mole of salt

x = degree of ionisation = 1

C₂H₅OH is a non-electrolyte hence, y = 1

Thus, π ∝ Mi, RT being constant. Greater the value of Mi, greater the osmotic pressure.

Thus, π ∝ Mi have equal values.

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Consider the separate solutions of0.500 M C2H5OH (aq)0.100 M Mg3(P04)2(aq)0.250 M KBr(ag)0.125 MNa3PO4(aq)each at 25C.Which statement is true about these solutions assuming all salts to be strong electrolytes?[JEE Main 2014]a)They all have same osmotic pressureb)0.100 M Mg3(P04)2 (aq)has the highest osmotic pressurec)0.125 M Na3P04(aq)has the highest osmotic pressured)0.500 M C2H5OH(aq) has the highest osmotic pressureCorrect answer is option 'A'. Can you explain this answer?

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