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Po = 23,76 mmHg
X(urea) = 0,2, maka
X(air)=0,8
Ditanya : P
sehingga
P = Po.X(air)
= 23,76 .0,8
= 19,008 mmHg
2) Diketahui, massa glukosa 18 gram, H2O = 90 gram
Po= 97,5 mmHg
Ditanya : ΔP?
Jawab :
mol glukosa = gram/Mr = 18/180 = 0,1 mol
mol H2O = gram/Mr = 90/18 = 5 mol
X(glukosa) = (mol glukosa)/(mol glukosa + mol H2O)
= (0,1)/(0,1+5)
= 0,1/5,1 = 0,0196
ΔP = Po.X(glukosa)
= 0,0196 . 97,5 = 1,91176 mmHg = 1,91 mmHg