Question

A) A solution of c6h2o4 in c2h5oh has a boiling point of 80.38 Celsius. what is the molality of the solution ?

B) what is the approximation of concentration of dissolved solution in blood, if the osmotic pressure is 7.65 atm at 37Celsius.

Answer 1

a. molality-m=1.623

b. molarity-M=0.3

Further explanation

a. Boiling point

`\tt \Delta Tb=Kb* m`

Kb for ethanol=1.22 °C/m

Boiling point for ethanol = 78.4 °C

ΔTb=80.38-78.4=1.98

`\tt 1.98=1.22* m\\\\m=(1.98)/(1.22)=1.623`

b. osmotic pressure

`\tt \pi =MRT`

π = 7.65 atm

R = 0.08205 L/atm K

T = 37 + 273 = 310 K

`\tt M=(\pi)/(RT)=(7.65)/(0.08205* 310)=0.3~M`