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Standard XII

Chemistry

Osmotic Pressure

The osmotic p...

Question

The osmotic pressure of the solution obtained by mixing $200 {c m}^{3}$ of $2$ (mass-volume) solution of urea with $200 {c m}^{3}$ of $3.42$ solution of sucrose at $20$ is?

421 P a

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267 P a

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5240 P a

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153 P a

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Solution

The correct option is B $267 P a$
$200 m l$ of $2$ % urea is mixed with $200 m l$ of $3.42$ % of sucrose at $20^{o} C$ .
Osmotic pressure
$π = C R T$
Molar concentration in $400 m l$
$= {(\frac{2}{60})}_{U r e a} + {(\frac{3.42}{342})}_{S u c r o s e}$
$= 0.034 + 0.01 = 0.044$ moles
$= \frac{0.044 \times 1000}{400} = 0.11 M$
$∴ π = 0.11 \times 8.314 \times 293$
$= 267.9 P a$

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Similar questions

Q. The osmotic pressure of the solution obtained by mixing

200 {c m}^{3}

2

%(mass-volume) solution of urea with

200 {c m}^{3}

3.42 %

solution of sucrose at

20^{o} C

is:

Q. What is the osmotic pressure of the solution obtained by mixing

300 c m^{3}

2 %

(mass-volume) solution of urea with

300 c m^{3}

3.42 %

solution of sucrose of

20^{o} C

?
(

R = 0.082 L a t m K^{- 1} m o l^{- 1}

)

What is the osmotic pressure of the solution obtained by mixing 300cc of 2% (m/v) solution of urea with 300cc of 3.42% solution of sucrose at 20^°C? (R = 0.0821 L atm K^-1 mol^-1)

Q. A solution obtained by mixing

100 m L

20 %

solution of urea (

m o l a r m a s s = 60

) and

10 m L

1.65

solution of cane sugar (

m o l a r m a s s = 342

) at

300 K

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). Calculate.
(a)Osmotic pressure of urea solution, (b) Osmotic pressure of cane sugar solution, (c) Total osmotic pressure of solution:

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The osmotic pressure of the solution obtained by mixing 200cm3 of 2 (mass-volume) solution of urea with 200cm3 of 3.42 solution of sucrose at 20 is?

The correct option is B 267Pa200ml of 2% urea is mixed with 200ml of 3.42% of sucrose at 20oC.Osmotic pressureπ=CRTMolar concentration in 400ml=(260)Urea+(3.42342)Sucrose=0.034+0.01=0.044 moles=0.044×1000400=0.11M∴π=0.11×8.314×293 =267.9Pa

The osmotic pressure of the solution obtained by mixing $200 {c m}^{3}$ of $2$ (mass-volume) solution of urea with $200 {c m}^{3}$ of $3.42$ solution of sucrose at $20$ is?