Solutions - Intext Questions and Answer - class 12 chemistry

Solution of NCERT In Text Questions-2.11

Question – 2.11 - Calculate the mass of ascorbic acid (Vitamin C, C₆ H₈ O ₆) to be dissolved in 75 g of acetic acid to lower its melting point by 1.5°C. K _f = 3.9 K kg mol ^{– 1}.

Solution:

Given,

Lowering of melting point

Molar mass of ascorbic acid (M _B) = 176 g mol ^{– 1}

Thus, mass of ascorbic (W_B ) = ?

We know that,

Thus, required mass of ascorbic acid = 5.077 g

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