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ΔTb = 101,56 - 100 = 1,56
ΔTb = kb . m . i
1,56 = 0,52 . .
1,56 = 0,52 . .
1,56 = 0,52 . . 4
269,1 = 2,08 gr
gr = 129,375
mr bacl= 172,5 ; i=2 karna BaCl termasuk larutan elektrolit
ΔTb= Kb.m.i
1,56=0,52.m.2
m= 1,56/1,04
m= 1,5
m= gr/mr x 1000/gp
1,5= x/172,5 x 1000/250
258,75=x . 4
x=64,6875
coba cek hasilnya, kalo caranya insyaAllah udah bener.