titik beku 2 gr suatu zat non ekeltrolit dalam 500°gr air ialah -0,124°c temukan MR zat non elektrolit itu jika diketahui kf air 1,86°c

Diketahui :
non elektrolit, berarti tak perlu dikalikan i
m = 2gr
P = 500gr
Kf air = 1,86

Tf = 0 - ∆Tf
-0,124 = 0 - ∆Tf
∆Tf = 0,124

Berapa Mr zat tsb?

∆Tf = Kf × molal
∆Tf = Kf × (gr/Mr) × (1000/P)
0,124 = 1,86 × (2/Mr) × (1000/500)
(124/1000) = (186/100) × (2/Mr) × 2
(124/10) = 186 × (2/Mr) × 2
124 Mr = 186 × 2 × 2 × 10
Mr = 7440/124
Mr = 60