Correct Answer - 5.077g
Mw2(C6H8O6)=12×6+1×8+6×16=72+87+96
=176gmol-1
Mw1(CHM3COOH)=60gmol-1
ΔTf=1.5∘Kf=3.9Kkgmol-1
W1(CHM3COOH)=75g,W2=?
Applying the formula,
ΔTf=Kf×m=Kf×
W2×1000
Mw2×W1
1.5K=3.9Kkgmol-1×
W2×1000
176gmol-1×75g
∴W2=
1.5×176gmol-1×75g
3.9×Kkgmol-1×1000
=5.0769≈5.077g