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A 0.01 solution of  K3(Fe(CN)6) is 50% dissociated at 27degrees then the osmotic pressure of the solution will be 
1. 0.02atm
2. 0.61atm
3. 0.78atm
4. 1.29atm

Asked by damarlasumanjali 20th April 2015, 6:25 PM
Answered by Expert
Answer:

Let the degree of dissociation be 'a' then

space space space space space space space space space space space space space space space space space straight K 3 left square bracket Fe left parenthesis CN right parenthesis 6 right square bracket space left right double arrow space 3 straight K to the power of plus space plus space left square bracket Fe left parenthesis CN right parenthesis subscript 6 right square bracket to the power of 3 minus end exponent Initial space space space space space space space space space space space space space space space 1 space space space space space space space space space space space space space space space space space space space space 0 space space space space space space space space space space space space space space space space space 0 Equi space space space space space space space space space space space space space 1 minus straight a space space space space space space space space space space space space space space space space space 3 straight a space space space space space space space space space space space space space space space space space straight a  straight i space equals space fraction numerator Total space number space of space moles space of space particles space after space dissociation over denominator Total space number space of space particles space before space dissociation end fraction  straight i space equals space 1 minus straight a plus 3 straight a plus straight a equals 1 plus 3 straight a but space straight a space equals space 50 % space equals 50 divided by 100 space equals space 0.5 so space straight i space equals space 1 plus space left parenthesis 3 space cross times space 0.5 right parenthesis space equals space 2.5 Osmotic space pressure space equals space straight i space cross times space Normal space osmotic space pressure space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space straight i space cross times space CRT space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 2.5 space cross times space 0.01 space cross times space 0.082 space cross times space 300 space space space space space space space space space space space space space space space space space space space space space space space space space space space space space space equals space 0.615 space space atm space space space space space space space space space space space space space space space space space space space

Answered by Expert 20th April 2015, 7:09 PM
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