Question

Minta tolong kakakk no 5 sama 6

Answer 1

5. ΔTb = m . Kb
100,1 - 100 = m . 0.5
m = 0.2 molal

gram air = p . V = 1 . 250 = 250 gram

0.2 = X / 342 x 1000/250
X = 17.1 gram (D)

6. ΔTb = m . Kb . i
100.26 - 100 = m . 0.52 . 2
m = 0.25 molal

ΔTf = m . Kf . i
Tf° - Tf = 0.25 . 1.86 . 2
0 - Tf = 0.93
Tf = - 0.93°C (D)