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Calculate the molar concentration of ure...

Calculate the molar concentration of urea solution if it exerts an osmotic pressure of 2.45 atmosphere at 300K . (R=0.0821L atm `mol^-1 K^-1`)

Text Solution

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The correct Answer is:
`0.0995 mol L^(-1)`
`pi = 2 . 45 atm , t = 300 K`
`R = 0.0821 L atm K^(-1) mol^(-1)`
`pi = CRT`
`C = (pi)/(RT) = ((2 . 45 atm))/((0.0821 L atm K^(-1) mol^(-1)) xx 300K)`
`= (2.45 )/( 3 xx 8 .21) mol L^(-1) = 0.0995 M`
`= 0.095 xx 10 ^(-2) M`
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