Chemistry - Class Twelve

Solutions

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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

Solutions class 12 chemistry - NCERT In Text Solution57

Molar mass of ascorbic acid (M B) = 176 g mol – 1

Thus, mass of ascorbic (WB ) = ?

We know that,

Solutions class 12 chemistry - NCERT In Text Solution58

Thus, required mass of ascorbic acid = 5.077 g

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Topics covered in this chapter of Solutions

1. Solutions

2. Types of Solutions

3. Solutions - Concentration

4. Solution of NCERT In Text Questions

Class 12 Biology

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