hitunglah titik beku larutan 12, 8 gram naftalebc( C4 H8 ) dalam 250 gram benzena. jika titik beku benzena = 5,5° C,, Kf Benzena = 5,10° kg/mol

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hitunglah titik beku larutan 12, 8 gram naftalebc( C4 H8 ) dalam 250 gram benzena. jika titik beku benzena = 5,5° C,, Kf Benzena = 5,10° kg/mol

ΔTf = Kf.M.i
Tf°-Tf = Kf. frac{grt}{Mrt} .frac{V}{grp}.i
5,5-Tf = 5,1.frac{12,8}{56} . frac{1000}{250} .1 \\ 5,5-Tf = 5,1.frac{12,8}{56}.4 \\ 5,5-Tf = 4,661 \\ Tf= 0,839°C