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m = 0,4
Kf = 1,86
n = 2 (karena NaCl mempunyai 2 ion)
ΔTf = m × Kf × ( 1 + (n-1) α )
1,488 = 0,4 × 1,86 × ( 1 + (2-1) α)
1,488 = 0,744 × ( 1 + α )
1,488 ÷ 0, 744 = 1 + α
2 = 1 + α
α = 2 - 1
α = 1