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Sea water is 3.5%by mass of a salt and h...

Sea water is `3.5%`by mass of a salt and has a density `1.04gcm^(-3)` at `293K`.Assuming the salt to be sodium chloride ,calculate the osmotic pressure of sea water.Assume complete ionisation of the salt-

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Mass of NaCl = 3.5 g
`"No. of moles "=3.5/58.5`
Actual number of moles of particles of solute in solution.
`(2xx3.5)/58.5`
`"Volume of solution"=100/(1.04xx1000)litre`
`pi=(2xx3.5)/58.5=(1.04xx1000)/100xx0.0821xx293=29.93atm.`
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