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aqim
Student XII IPA

Diketahui:

Mr urea = 60

mol urea = massa/Mr = 10/60 = 1/6

mol air = 90/18 = 5 (volum air telah dikonversi ke massa karena ρ air = 1 gram/ml

Ditanya : P?

fraksi mol pelarut Xp = mol air / [mol air + mol urea]

Xp = 5 / [5 + 1/6]

Xp = 30/31

p₀ air = 62 cmHg


tekanan uap laruta p = p₀ . Xp

p = 62 x 30/31


jadi p = 60 mmHg

4 tahun yang lalu




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