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blood is said to be isotonic with 0.85%[wt/v].NaCl solution at 40degrees celsius.assuming complete dissosiation of nacl .calculate total concentration of various solutes in blood .also report its approximate freezing point.

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Manish Shankar ·2009-04-13 21:23:42

isotonic means same osmotic pressure

Ï€=CRT for blood

Ï€=iCRT for (NaCl solution)
=2*(0.85/100)/58.5*1000 RT

CRT=2*(0.85/100)/58.5*1000 RT

so C=2*(0.85/100)/58.5*1000=0.29 M

Î”T_f=K_fm=1.86*0.29=0.54 Â°C

so freezing point is -0.54 Â°C

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