Question

Diketahui masa molekul relatif fruktosa Mr = 180. molalitas larutan fruktosa 10% adalah .... molal

Answer 1

Diket:
10% Fruktosa
Mr fruktosa = 180
Dit: molalitas (m)....?
10% Fruktosa berarti dlm dlm tiap 100 gram larutan glukosa, massa glukosa = 10 gram, massa air (p) = 90 gram = 0,09 kg
mol Fruktosa (n) = Massa Fruktosa/Mr = 10/180
m = n/p
m = (10/180) / 0,09
m = 10/16,2
m = 0,617 molal.