Q. 114.3( 22 Votes )

Calculate the mas

Answer :

Given,


Mass of acetic acid, w1 = 75 g


Lowering of melting point, ΔTf = 1.5 K


Kf = 3.9 K kg/mol


Molar mass of ascorbic acid (C6H8O6), M2 6 × 12 + 8 × 1 + 6 × 16 = 176 g/mol[1]


We know that,


ΔTb =


1.5 =


w2 =


= 5.08 g


Hence,


5.08 g of ascorbic acid is needed to be dissolved.


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