Question

Berapa gram zat non elektrolit Mr = 40 harus dilarutkan kedalam 1,2 kg air Kf air = 1,86 agar membeku pada temperatur -1,55 C

Answer 1

ム Tf = Tf° - Tf = 0 - (-1,55) = 1.55 °C
ムTf = Kf x m
ムTf = Kf x gr/Mr x 1000/P
1,55 = 1,86 x gr/40 x 1000/1200
62 = 1,55gr
gr = 40 gram