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Physical Chemistry

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20 Feb 2007 17:51:01 IST

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535

solutions,

None

1) with which molarity of NaOH solutionwill be iso-osmotic with 4N H₂SO₄ at 25 ⁰C

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vir sharma

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Joined: 17 Feb 2007

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20 Feb 2007 18:39:46 IST

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PLZ TELL THE ANS.

rik_mad

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20 Feb 2007 19:00:29 IST

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is it 2 molar

vir sharma

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20 Feb 2007 19:13:15 IST

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Osmotic pressure
P(pi)=CRT
C = concentration or molarity
P=osmotic pressure
here molarity = normality/2 (acidity of H2S04 is 2 & basicity of NaOH is 1)

AS temp. is same R is same therefore
P1=P2 when C/2 = C2 OR C1=2 C2

Bipin Dubey

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Joined: 23 Jan 2007

Posts: 7942

22 Feb 2007 00:27:22 IST

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Osmotic pressure = CRT
C is the concentration
T is the temperature(constant in this case)

Since their osmotic pressures are equal their concentrations are also equal.
Molarity of NaOH = Molarity of H₂SO₄
                          = Normality/acidity
                          = 4/2
                          = 2 M

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