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M terlarut = 10 gr
M pelarut = 50 gr
Kb air = 0,52
Tb = 102,08
DTb = 2,08
n = 3
Mr = 90
ditanya = a ?
jawab =
Dtb = Kb×m×i
2,08 = 0,52 × 10/90×1000/50 ×i
2,08 = 0,52 × 0,11 × 20 × i
2,08 = 1,14 × i
i = 2,08 - 1,14
i = 0,94
i= 1+(n-1)a
0,94 = 1+(3-1)a
0,94=1+2a
2a = 0,94 -1
a. = -0.06/2
a. = -0.03