The depression in freezing point is given by ΔTf = i × kf × m i can be calculated, if we consider the following reaction: K3[Fe(CN)6] → 3K++[Fe(CN)6]3− i = 3 + 1 = 4 ΔTf = i × kf×
WB
MB
×
1000
WA
= 4 × 1.86 ×
0.1
329
×1000100 = 0.0226 ~ 2.3 × 10−2 Freezing point = –2.3 × 10–2 (negative sign because there is depression in freezing point).