hitungkan fraksi mol gula pasir [ C12 H22 O11 ] dari larutan gula 30 %

Larutan gula 30% artinya 30 gram gula dari total 100 gram gula + air

m C12H22O11 = 30 gr
m H20 = 100 - 30 = 70 gr
Mr C12H22O11 = 342
Mr H2O = 14
n C12H22O11 = 30/342 = 0,087 mol
n H2O = 70/14 = 5 mol

X C12H22O11 = n C12H22O11 ÷ (n C12H22O11 +n H2O)
X C12H22O11 = 0,087 ÷ (0,087 + 5)
X C12H22O11 = 0,017

Jadi, fraksi mol gula pasir = 0,017


- Oswyth -